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Gossen Metrawatt PROFITEST MTECH plus Manual

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Operating Instructions
3-349-647-03
11/11.14
Series PROFITESTMASTER
PROFITESTMBASE+, MTECH+, MPRO, MXTRA, SECULIFEIP
Test Instruments for DIN VDE 0100
2 GMC-I Messtechnik GmbH
456
8
91011
7
MEM: Key for memory functions
HELP: Access context sensitive help
I
N
: Tripping test
Proceeding to next function
(semi-automatic measurement)
Start offset measurements
ON/START
: Switch instrument on,
start/stop measurement
ESC:Return to submenu
13
31
Softkeys
Control Panel
Test Instrument and Adapter
16 1715
14
Fixed Function Keys
2
19 20 21
22
12
!
RS 232
2
• Parameter selection
• Specify limit value
• Entry functions
• Memory functions
LEDs and connection icons
section 18
9
10
Sockets for Current Clamp Sensor, Probe and
PRO-AB Leakage Current Adapter
15
16
17
Interfaces, Charger Jack
* Refer to section 2.1 page 5 regarding usage of
the test probes.
*
*
*
18
GMC-I Messtechnik GmbH 3
Key
Overview of Device Settings and Measuring Functions
1)
nur MXTRA & SECULIFE IP
2)
nur MXTRA
3)
nur MTECH+ & MXTRA
Test Instrument and Adapter
1 Control panel with keys and
display panel with detent for
ideal viewing angle
2 Eyelets for attaching the
shoulder strap
3 Rotary selector switch
4 Measuring adapter (2-pole)
5 Plug insert (country specific)
6 Test plug (with retainer ring)
7 Alligator clip (plug-on)
8 Test probes
9 t key ON/START *
10 I key I
N
/compens./Z
OFFSET
11 Contact surfaces for finger
contact
12 Test plug holder
13 Fuses
14 Holder for test probes (8)
Connections for Current Clamp,
Probe and PRO-AB Adapter
15 Current clamp connection 1
16 Current clamp connection 2
17 Probe connection
Interfaces, Charger Jack
18 Bluetooth
®
19 USB slave for PC connection
20 RS 232 for connecting barcode
scanner or RFID reader
21 Jack for Z502P charger
Attention! Make sure that no
batteries are inserted before
connecting the charger.
22 Battery Compartment Lid
(compartment for batteries
and replacement fuses)
Please refer to section 17 for
explanations regarding control
and display elements.
Battery level indicator
Meas. function
Meas. in progress /
Memory occupancy
Measured
Parameter
Display Panel
PE
Save value
Battery full
Battery OK
Battery weak
Battery (nearly)
Battery level indicator
BAT
BAT
BAT
BAT
Memory occupancy display
MEM
Memory half full
MEM
Memory full > transfer data to PC
Connection Test – Mains Connection Test ( section 18)
N
PE
L
N
PE
L
)(
Connection OK L and N reversed
N
PE
L N
PE
L
x
N
PE
L N
PE
L
x
x
RUN READY
Connection test section 18
depleted: U < 8 V
L
PE
N
x
L
PE
N
These operating instructions describe a tester with
software version SW-VERSION (SW1) 01.15.00
* Can only be switched on with the key on the instrument
Bluetooth
®
active:
quantities
stopped
Switch
Setting,
Descr. on
Picto-
graph
Device Settings
Measuring Functions
SETUP
page 8
Brightness, contrast, time/date, Bluetooth®
Language (D, GB, P), profiles (ETC, PS3, PC.doc)
Default settings
< Test: LED, LCD, acoustic signal
Rotary switch balancing,
battery test >
Measurements with line voltage
U
page 16
Single-phase measurement U
L-N-PE
UL-N Voltage between L and N
UL-PE Voltage between L and PE
UN-PE Voltage between N and PE
US-PE Voltage between probe and PE
f Frequency
3-phase measurement U
3~
UL3-L1 Voltage between L3 and L1
UL1-L2 Voltage between L1 and L2
UL2-L3 Voltage between L2 and L3
f Frequency
Phase sequence
Appears for all meas.
shown below:
U / U
N
Line voltage / nominal line voltage
f / f
N
Line frequency / nominal line frequency
IN
page 18
UIN Contact voltage
ta Tripping time
RE Earth resistance
IF
page 20
UIN Contact voltage
I Residual current
RE Earth resistance
ZL-PE
page 26
ZL-PE Loop impedance
IK Short-circuit current
ZL-N
page 28
ZL-N Line impedance
IK Short-circuit current
RE
page 30
2-pole measurement (ground loop) RE(L-PE)
2-pole measurement with country spec. plug
3-pole measurement (2-pole with probe)
Selective meas. with current clamp sensor
UE Earth electrode voltage (probe/clamp)
Measurements at voltage-free objects
RE
(MPRO)
(MXTRA)
page 37
3-pole measurement
4-pole measurement
Selective measurement with current clamp sensor
2-clamp measurement (earth loop res.)
Soil resistivity
E
RLO
page 47
RLO Low-resistance with polarity reversal
RLO+, RLO– Low-resistance, single-pole
Roffset Offset resistance
RISO
page 44
RISO Insulation resistance
RE(ISO) Earth leakage resistance
U Voltage at the test probes
UISO Test voltage
Ramp: triggering/breakdown voltage
SENSOR
page 50
I
L/AMP
Residual or leakage current
T/RF Temperature/humidity (in preparation)
EXTRA
page 51
U Voltage drop measurement
ZST Standing surface insulation impedance
kWh test Meter start-up test, earth contact plug
IL
1
Leakage current meas. with Z502S adapter
IMD
2
Check insulation monitoring device
Ures
2
Residual voltage test
ta + I
2
Intelligent ramp
RCM
2
RCM (residual current monitor)
e-mobility
3
Electric vehicles at charging stations (IEC 61851)
PRCD
2
Testing of PRCDs type S and K
AUTO
page 64
Automatic test sequences
4 GMC-I Messtechnik GmbH
Table of Contents Page Page
1 Scope of delivery ............................................................. 5
2 Applications ..................................................................... 5
2.1 Using Cable Sets and Test Probes ...............................................5
2.2 Overview of Features Included
with PROFITEST MASTER & SECULIFE IP Device Variants ..........6
3 Safety Features and Precautions ..................................... 6
4 Initial Start-Up .................................................................. 7
4.1 Preparation for use ......................................................................7
4.2 Installing or Replacing the Battery Pack .....................................7
4.3 Switching the Instrument On/Off .................................................7
4.4 Battery Test .................................................................................7
4.5 Charging the Battery Pack in the Tester .....................................7
4.6 Device Settings ...........................................................................8
5 General Notes ................................................................ 13
5.1 Connecting the Instrument ........................................................13
5.2 Automatic Settings, Monitoring and Shut-Off ...........................13
5.3 Measurement Value Display and Memory .................................13
5.4 Testing Earthing Contact Sockets for Correct Connection ........13
5.5 Help Function ............................................................................14
5.6 Setting Parameters or Limit Values using RCD Measurement as an
Example .....................................................................................14
5.7 Freely Selectable Parameter Settings or Limit Values ..............15
5.8 2-Pole Measurement with Fast or Semiautomatic Polarity Reversal ... 15
6 Measuring Voltage and Frequency ................................ 16
6.1 Single-Phase Measurement ......................................................16
6.1.1 Voltage Between L and N (U
L-N
),
L and PE
(U
L-PE
) a
nd N and PE
(U
N-PE
)
with Country-Specific Plug Insert, e.g. SCHUKO .............................16
6.1.2 Voltage between L – PE, N – PE and L – L with 2-Pole Adapter Connection 16
6.2 3-Phase Measurement (line-to-line voltage) and Phase Sequence 17
7
Testing RCDs .......................................................................17
7.1 Measuring Contact Voltage (with reference to nominal residual
current) with
1
/
3
Nominal Residual Current and Tripping Test with
Nominal Residual Current .........................................................18
7.2
Special Testing for Systems and RCCBs .........................................20
7.2.1 Testing Systems and RCCBs with Rising Residual Current (AC) for Type
AC, A/F, B/B+ and EV RCDs .........................................................20
7.2.2 Testing Systems and RCCBs with Rising Residual Current (AC) for Type
B/B+ and EV RCDs (nur MTECH+, MXTRA & SECULIFE IP) ............20
7.2.3 Testing RCCBS with 5 I
N .............................................................21
7.2.4 Testing of RCCBs which are Suited for
Pulsating DC Residual Current ......................................................21
7.3 Testing for Special RCDs ...........................................................22
7.3.1 System, Type RCD-S Selective RCCBs ..........................................22
7.3.2 PRCDs with Non-Linear Type PRCD-K Elements ............................22
7.3.3 SRCD, PRCD-S (SCHUKOMAT, SIDOS or comparable) ....................23
7.3.4 Type G or R RCCB .......................................................................24
7.4 Testing Residual Current Circuit Breakers in TN-S Systems .....25
7.5 Testing of RCD Protection in IT Systems with High Cable
Capacitance (e.g. in Norway) ....................................................25
8 Testing of Breaking Requirements
Overcurrent Protective Devices,
Measurement of Loop Impedance and
Determination of Short-Circuit Current
(functions Z
L-PE
and I
K
) ................................................. 26
8.1 Measurements with Suppression of RCD Tripping ....................27
8.1.1 Measurement with Positive Half-Waves (only MTECH+/MXTRA/
SECULIFE IP) ...............................................................................27
8.2 Evaluation of Measured Values .................................................27
8.3
Settings for Short-circuit current Calculation – Parameter I
K
........28
9 Measuring Line Impedance (Z
L-N
function) ................... 28
10 Earthing Resistance Measurement (R
E
function) ........... 30
10.1 Earthing Resistance Measurement – Mains Operated ..............31
10.2 Earthing Resistance Measurement – Battery Powered
(only MPRO & MXTRA) ...............................................................31
10.3 Earthing Resistance, Mains Powered – 2-Pole Measurement with 2-
Pole Adapter or Country-Specific Plug (Schuko) without Probe ... 32
10.4 Earthing Resistance Measurement, Mains Powered – 3-Pole Me-
asurement: 2-Pole Adapter with Probe ....................................33
10.5 Earthing Resistance Measurement, Mains Powered – Measu-
rement of Earth Electrode Voltage (U
E
function) ......................34
10.6 Earthing Resistance Measurement, Mains Powered – Selective
Earthing Resistance Measurement with Current Clamp Sensor as
Accessory ..................................................................................35
10.7 Earthing Resistance Measurement, Battery Operated – 3-Pole
(only MPRO & MXTRA) ...............................................................37
10.8 Earthing Resistance Measurement, Battery Operated – 4-Pole
(only MPRO & MXTRA) ...............................................................38
10.9 Earthing Resistance Measurement, Battery Operated – Selective
(4-pole) with Current Clamp Sensor and PRO-RE Measuring Adap-
ter as Accessory (only MPRO & MXTRA) ...................................40
10.10 Earthing Resistance Measurement, Battery Powered – Ground Loop
Measurement (with current clamp sensor and transformer, plus PRO-
RE/2 measuring adapter as accessory) (only MPRO & MXTRA) ..... 41
10.11 Earthing Resistance Measurement, Battery Powered
– Measurement of Soil Resistivity
E
(only MPRO & MXTRA) ...42
11
Measuring Insulation Resistance ........................................ 44
11.1 General ......................................................................................44
11.2 Special Case: Earth Leakage Resistance (R
EISO
) .....................46
12 Measuring Low-Value Resistance
up to 200 Ohm
(protective
conductor and equipotential bonding conductor) ............... 47
12.1 Measurements with Constant Test Current ..............................48
12.2 Protective Conductor Resistance Measurement with Ramp Curve
– Measurements on PRCDs with Current-monitored Protective
Conductor Using PROFITEST PRCD Test Adapter as Accessory 49
13 Measurement with Accessory Sensors .......................... 50
13.1 Current Measurement with Current Clamp Sensor ...................50
14
Special Functions – EXTRA Switch Position ..............................51
14.1 Voltage Drop Measurement (at ZLN) – U Function .................52
14.2 Measuring the Impedance of Insulating Floors and Walls (standing
surface insulation impedance) – Z
ST
Function .........................53
14.3 Testing Meter Start-Up with Earthing Contact Plug
– kWh Function (not SECULIFE IP) .............................................54
14.4 Leakage Current Measurement
with PRO-AB Leakage Current Adapter as Accessory
– I
L
Function (PROFITEST MXTRA & SECULIFE IP only) .............55
14.5 Testing of Insulation Monitoring Devices – IMD Function
(PROFITEST MXTRA & SECULIFE IP only) ...................................56
14.6
Residual Voltage Test – Ures Function (
PROFITEST MXTRA
only) .....58
14.7
Intelligent Ramp – ta+ID Function (
PROFITEST MXTRA
only) ....... 59
14.7.1 Applications ................................................................................59
14.8 Testing Residual Current Monitors
– RCM Function (PROFITEST MXTRA only) ................................60
14.9 Testing the Operating States of Electric Vehicles at Charging Sta-
tions per IEC 61851 (MTECH+ & MXTRA only) ..........................61
14.10 Test Sequences for Report Generation of Fault Simulations on
PRCDs with PROFITEST PRCD Adapter (MXTRA only) ...............62
14.10.1 Selecting the PRCD under Test .....................................................62
14.10.2 Parameter Settings ......................................................................62
14.10.3 Test Sequence PRCD-S (single phase) – 11 Test Steps .................63
14.10.4 Test Sequence PRCD-S (three-phase) – 18 Test Steps ..................63
15 Automatic Test Sequences – AUTO Function ................. 64
16 Database ........................................................................ 66
16.1 Creating Distributor Structures, General ...................................66
GMC-I Messtechnik GmbH 5
16.2 Transferring Distributor Structures ........................................... 66
16.3 Creating a Distributor Structure in the Test Instrument ........... 66
16.3.1 Creating Structures (example for electrical circuit) ......................... 67
16.3.2 Searching for Structural Elements ................................................ 68
16.4 Saving Data and Generating Reports ........................................ 69
16.4.1 Use of Barcode Scanners and RFID Readers ................................. 70
17 Operating and Display Elements ....................................71
18 LED Indications, Mains Connections and Potential Differences 73
19 Characteristic Values ......................................................82
20 Maintenance ...................................................................87
20.1 Firmware Revision and Calibration Information ....................... 87
20.2 Rechargeable Battery Operation, and Charging ....................... 87
20.2.1 Charging Procedure with Charger for Z502R ................................. 87
20.3 Fuses ........................................................................................ 87
20.4 Housing ..................................................................................... 87
21 Appendix .........................................................................88
21.1
Tables for the determination of maximum or minimum display values
under consideration of maximum measuring uncertainty: ...................88
21.2 At which values should/must an RCD actually be tripped?
Requirements for Residual Current Devices (RCDs) ................. 90
21.3 Testing Electrical Machines per DIN EN 60204 –
Applications, Limit Values ......................................................... 91
21.4 Periodic Testing per DGUV provision 3 (previously BGV A3) – Limit
Values for Electrical Systems and Operating Equipment .......... 92
21.5 List of Abbreviations and their Meanings ................................. 93
21.6 Keyword Index .......................................................................... 94
21.7 Bibliography .............................................................................. 95
21.7.1 Internet Addresses for Additional Information ............................... 95
22 Repair and Replacement Parts Service
Calibration Center and Rental Instrument Service .........96
23 Recalibration ..................................................................96
24 Product Support .............................................................96
1 Scope of delivery
1Test instrument
1 Earthing contact plug insert (country-specific)
1 2-pole measuring adapter and 1 cable for expansion into a
3-pole adapter (PRO-A3-II)
2 Alligator clips
1 Shoulder strap
1 Compact Master Battery Pack (Z502H)
1 Charger Z502R
1 DAkkS calibration certificate
1USB cable
1 Condensed operating instructions
1 Supplement Safety Information
– Detailed operating instructions for download from our website
at www.gossenmetrawatt.com
2 Applications
The PROFITEST MASTER and SECULIFE IP measuring and test instru-
ments allow for quick and efficient testing of protective measures
in accordance with DIN VDE 0100, part 600:2008
(Erection of low-
voltage installations; tests – initial tests), as well as
ÖVE-EN 1 (Aus-
tria), NIV/NIN SEV 1000 (Switzerland) and other country-specific
regulations.
The test instrument is equipped with a microprocessor and com-
plies with IEC 61557/EN 61557/VDE 0413 regulations:
Part 1: General requirements
Part 2: Insulation resistance
Part 3: Loop resistance
Part 4:
Resistance of earth connection and equipotential bonding
Part 5: Earth resistance
Part 6: Effectiveness of residual current devices (RCD) in TT, TN
and IT systems
Part 7: Phase sequence
Part 10:Electrical safety in low-voltage systems up to 1000 V AC
and 1500 V DC – Equipment for testing, measuring or
monitoring of protective measures
Part 11:Effectiveness of type A and type B residual current moni-
tors (RCMs) in TT, TN and IT systems
The test instrument is especially well suited for:
•System setup
• Initial start-up
• Periodic testing
• Troubleshooting in electrical systems
All of the values required for approval reports (e.g. for ZVEH) can
be measured with this instrument.
All acquired data can be archived, in addition to the measurement
and test reports which can be printed out at a PC. This is of spe-
cial significance where product liability is concerned.
The applications range of the test instruments covers all alternat-
ing and three-phase current systems with nominal voltages of
230 V / 400 V (300 V / 500 V) and nominal frequencies of 16
2
/
3
/
50 / 60 / 200 / 400 Hz.
The following can be measured and tested with the instruments:
• Voltage / frequency / phase sequence
• Loop impedance / line impedance
• Residual current devices (RCDs)
• Insulation monitoring devices (IMDs) (only
MXTRA
&
SECULIFE IP
)
• Residual current monitoring devices (RCMs) (only MXTRA)
• Earthing resistance / earth electrode potential
• Standing surface insulation resistance / insulation resistance
• Earth leakage resistance
• Low-value resistance (potential equalization)
• Leakage currents with current transformer clamp
• Residual voltage (only MXTRA)
• Voltage drop
• Leakage current with leakage current adapter
• Meter start-up (not
SECULIFE IP
)
• Cable length
Refer to section 21.3 regarding testing of electrical machines in
accordance with DIN EN 60204.
Refer to section 21.4 regarding periodic testing in accordance
with DGUV provision 3 (previously BGV A3).
2.1 Using Cable Sets and Test Probes
• 2 or 3-pole measuring adapter included
• 2-pole measuring adapter with 10 m cable as optional acces-
sory: PRO-RLO II (Z501P)
• KS24 cable set as optional accessory (GTZ3201000R0001)
Measurements per DIN EN 61010-031 may only be performed in
environments in accordance with measuring categories III and IV
with the safety cap attached to the test probe at the end of the
measurement cable.
In order to establish contact inside 4 mm jacks, the safety caps
have to be removed by prying open the snap fastener with a
pointed object (e.g. the other test probe).
6 GMC-I Messtechnik GmbH
2.2 Overview of Features Included
with PROFITEST MASTER & SECULIFE IP Device Variants
1)
The so-called live measurement is only advisable if there is no bias current within
the system. Only suitable for motor circuit breaker with low nominal current
2
currently available languages: D, GB, I, F, E, P, NL, S, N, FIN, CZ, PL
3 Safety Features and Precautions
This instrument fulfills all requirements of applicable European and
national EC directives. We confirm this with the CE mark. The rel-
evant declaration of conformity can be obtained from GMC-I
Messtechnik GmbH.
The electronic measuring and test instrument is manufactured
and tested in accordance with safety regulations IEC 61010-1/
EN 61010-1/VDE 0411-1 and EN 61557.
Safety of the operator, as well as that of the instrument, is only
assured when it is used for its intended purpose.
Read the operating instructions thoroughly and carefully before using
your instrument. Follow all instructions contained therein. Make sure that
the operating instructions are available to all users of the instrument.
Tests may only be executed by a qualified electrician.
Grip and hold the test plug and test probes securely when they
have been inserted, for example, into a socket. Danger of injury
exists if tugging at the coil cord occurs, which may cause the test
plug or test probes to snap back.
The measuring and test instrument may not be placed into service:
• If the battery compartment lid has been removed
• If external damage is apparent
• If connector cable or measuring adapters are damaged
•If the instrument no longer functions flawlessly
• After a long period of storage under unfavorable conditions
(e.g. humidity, dust, temperature)
Exclusion of Liability
When testing systems with RCCBs, the latter may switch off. This may
occur even though the test does not normally provide for it. Leak-
age currents may be present which, in combination with the test
current of the test instrument, exceed the shutdown threshold
value of the RCCB. PCs which are operated in proximity to such
RCCB systems may switch off as a consequence. This may result
in inadvertent loss of data. Before conducting tests, precautions
should therefore be taken to ensure that all data and programs
are adequately saved, and the computer should be switched off if
necessary. The manufacturer of the test instrument assumes no
liability for any direct or indirect damage to equipment, comput-
ers, peripheral equipment or data bases when performing tests.
Opening of Equipment / Repair
The equipment may be opened only by authorized service per-
sonnel to ensure the safe and correct operation of the equipment
and to keep the warranty valid.
Even original spare parts may be installed only by authorized ser-
vice personnel.
In case the equipment was opened by unauthorized personnel,
no warranty regarding personal safety, measurement accuracy,
conformity with applicable safety measures or any consequential
damage is granted by the manufacturer.
Any warranty claims will be forfeited when the warranty seal has
been damaged or removed.
Meaning of Symbols on the Instrument
Warning concerning a point of danger
(Attention, observe documentation!)
Protection class II device
Charging socket for extra-low direct voltage (charger Z502R)
Attention!
Only rechargeable batteries may be inserted when the char-
ger is connected.
This device may not be disposed of with the trash. Fur-
ther information regarding the WEEE mark can be
accessed on the Internet at www.gossen-
metrawatt.com by entering the search term “WEEE”.
EC mark of conformity
PROFITEST ...
(Article Number)
MBASE+
(M520S)
M
PRO
(M520N)
M
TECH+
(M520R)
M
XTRA
(M520P)
SECULIFE IP
(M520U)
Testing of residual current devices (RCDs)
U
B
measurement without tripping RCD
3333
✓
Tripping time measurement
3333
✓
Measurement of tripping current I
F
3333
✓
Selective, SRCDs, PRCDs, type G/R
3333
✓
AC/DC sensitive RCDs, type B, B+ and EV ——
33
✓
Testing of IMDs ———
3
✓
Testing of RCMs ———
3
—
Testing for N-PE reversal
3333
✓
Measurement of loop impedance Z
L-P E
/ Z
L-N
Fuse table for systems without RCDs
3333
✓
Without tripping the RCD, fuse table ——
33
✓
With 15 mA test current
1
without tripping the
RCD
3333
✓
Earthing resistance R
E
(mains operation)
I-U measuring method (2/3-wire measuring
method via measuring adapter: 2-wire/2-wire +
probe)
3333
✓
Earthing resistance R
E
(battery operation)
3 or 4-wire measurement via PRO-RE adapter
—
3
—
3
—
Soil resistivity
E
(battery operation)
(4-wire measurement via PRO-RE adapter)
—
3
—
3
—
Selective earthing resistance R
E
(mains opera-
tion)
with 2-pole adapter, probe, earth electrode
and current clamp sensor (3-wire measuring
method)
3333
✓
Selective earthing resistance R
E
(battery operation)
with probe, earth electrode and current clamp
sensor (4-wire measuring method via PRO-RE
adapter and current clamp sensor)
—
3
—
3
—
Earth loop resistance R
ELOOP
(battery operation)
with 2 clamps (current clamp sensor direct
and current clamp transformer via PRO-RE/2
adapter)
—
3
—
3
—
Measurement of equipotential bonding R
LO
,
automatic polarity reversal
3333
✓
Insulation resistance R
ISO
,
variable or rising test voltage (ramp)
3333
✓
Voltage U
L-N
/ U
L-PE
/ U
N-PE
/ f
3333
✓
Special measurements
Leakage current (with clamp) I
L
, I
AMP
3333
✓
Phase sequence
3333
✓
Earth leakage resistance R
E(ISO)
3333
✓
Voltage drop (U)
3333
✓
Standing-surface insulation Z
ST
3333
✓
Meter start-up (kWh-Test)
3333
—
Leakage current with PRO-AB adapter (IL)
———
3
✓
Residual voltage test (Ures)
———
3
—
Intelligent ramp (ta + I)
———
3
—
Electric vehicles at charging stations
(IEC 61851)
——
33
—
Report generation of fault simulations on
PRCDs with PROFITEST PRCD adapter
———
✓
—
Features
Selectable user interface language
2
3333
✓
Memory (database for up to 50,000 objects)
3333
✓
Automatic test sequence function
3
2)
3 3 3
✓
RS 232 port for RFID/barcode scanner
3333
✓
USB port for data transmission
3333
✓
Interface for Bluetooth® ——
33
✓
ETC user software for PC
3333
✓
Measuring category: CAT III 600 V / CAT IV
300 V
3333
✓
DAkkS calibration
3333
✓
!
GMC-I Messtechnik GmbH 7
Any warranty claims will be forfeited when the warranty
seal has been damaged or removed.
Calibration Seal (blue seal):
See also “Recalibration” on page 96.
Data Backup
We advise you to regularly transmit your stored data to a PC in
order to prevent potential loss of data in the test instrument.
We assume no responsibility for any data loss.
We recommend the following PC software programs for data
processing and management:
•ETC
• E-Befund Manager (Austria)
•Protokollmanager
• PS3 (documentation, management, report generation and
monitoring of deadlines)
• PC.doc-WORD/EXCEL (report and list generation)
• PC.doc-ACCESS (test data management)
4 Initial Start-Up
4.1 Preparation for use
Before putting the test instrument into service and using it for the
first time, the lamination sheets must be removed from the two
sensor surfaces (finger contacts) of the test plug in order to
ensure that contact voltage is reliably detected.
4.2 Installing or Replacing the Battery Pack
Attention!
!
Before opening the battery compartment, disconnect the
instrument from the measuring circuit (mains) at all poles!
Note
See also section 20.2 on page 87 concerning charging
the Kompkt Akku Pack Master (Z502H) and the battery
charger Z502R.
Use Kompakt Akku Pack Master (Z502H), if possible, which is either
included in the standard equipment or available as an accessory, with
heat-sealed battery cells. Do not use any battery holders which can
be filled with individual batteries. This ensures that always a com-
plete set of batteries is replaced and all rechargeable batteries are
inserted with correct polarity in order to prevent leakage from the
batteries.
Only use commercially available battery packs if you charge them exter-
nally. The quality of these sets cannot be verified and this may, in
unfavourable cases, lead to heating and deformation (during the
charging in the device).
Dispose the battery packs or the individual rechargeable batteries
in an environmentally sound fashion when their service life has
nearly expired (approx. 80% charging capacity).
➭ Loosen the slotted screw for the battery compartment lid on
the back and remove the lid.
➭ Remove the discharged battery pack or the battery holder.
Attention!
!
When Using a Battery Holder:
It is imperative that you pay attention to the correct po-
larity when inserting the rechargeable batteries. If a bat-
tery has been inserted with incorrect polarity, it is not
detected by the instrument and may lead to battery leak-
age.
Individual rechargeable batteries may only be charged
externally.
➭ Slide the new battery pack/filled battery holder into the battery
compartment. The holder can only be inserted to its proper
position.
➭ Replace the lid and re-tighten the screw.
4.3 Switching the Instrument On/Off
The test instrument is switched on by pressing the ON/START key.
The menu which corresponds to the momentary selector switch
position is displayed.
The instrument can be switched off manually by simultaneously
pressing the MEM and HELP keys.
After the period of time selected in the SETUP menus has elapsed,
the instrument is switched off automatically (see “Device Set-
tings”, section 4.6.
4.4 Battery Test
If battery voltage has fallen below the permissible
lower limit, the pictograph shown at the right
appears. “Low Batt!!!” is also displayed along with a battery sym-
bol. The instrument does not function if the batteries have been
depleted excessively, and no display appears.
4.5 Charging the Battery Pack in the Tester
Attention!
!
Use only the charger Z502R to charge the Kompakt Akku-
Pack Master (Z502H) which has already been inserted into
the test instrument.
Make sure that the following conditions have been fulfilled be-
fore connecting the charger to the charging socket:
– Kompakt Akku-Pack Master (Z502H) has been
installed, no commercially available battery packs,
no individual rechargeable batteries, no standard
batteries
– The test instrument has been disconnected from the
measuring circuit at all poles
– The instrument must remain off during charging.
Refer to section 20.2.1 with regard to charging the battery pack
which has been inserted into the tester.
If the batteries or the battery pack have not been used or
recharged for a lengthy period of time (> 1 month), thus resulting
in excessive depletion:
Observe the charging sequence (indicated by LEDs at the char-
ger) and initiate a second charging sequence if necessary (dis-
connect the charger from the mains and from the test instrument
to this end, and then reconnect it).
Please note that the system clock stops in this case and must be
set to the correct time after the instrument has been restarted.
XY123
2012-06
D-K
15080-01-01
Consecutive number
Registration number
Date of calibration (year – month)
Deutsche Akkreditierungsstelle GmbH – calibration lab
8 GMC-I Messtechnik GmbH
4.6 Device Settings
SETUP
LED and LCD test menu
Rotary switch balancing
Brightness/contrast menu
Software revision level
Calibration date
Display: date / time
Display: automatic shutdown
Display: automatic shutdown
of display illumination after 15 s.
of the tester after 60 s.
Time, language, profiles
1
2
3
4
and battery test menu
0b
0a
0
Return to main menu
MAINS LED: test green
MAINS LED: test red
UL/RL LED: test red
RCD-FI LED: test red
Cell test
Inverse cell test
Hide all pixels
Show all pixels
Acoustic signal test
1
Return to main menu
Increase brightness
Bluetooth
®
submenu 
DB-MODE submenu 
Brightness/contrast submenu 
Set time
Profiles for
Default settings
distribution structures
User interface
language
3
3a
3b
3c
3d
3e
Set date
On-time
for display illumination / tester
0b
Return to submenu
0a
Display Illumination On-time
Bluetooth
®
and Brightness Plus Contrast Settings Time, On-Time and Default Settings
Menu Selection for Operating Parameters
LED tests LCD and Acoustic Signal Tests
Test Instrument On-Time
Select inspector
(change via ETC)
3g
3f
5
No automatic shut-down,
continuously on
3h
logged in test technician
GMC-I Messtechnik GmbH 9
LED and LCD test menu
Rotary switch balancing
Brightness/contrast menu
Software revision level
Calibration date
Display: date / time
Display: automatic shutdown
Display: automatic shutdown
of display illumination after 15 s.
of the tester after 60 s. Time, language, profiles
1
2
3
4
and battery test menu
0b
0a
0
Return to main menu
Bluetooth
®
submenu 
Brightness/contrast submenu 
Set time
Profiles for
Default settings
distribution structures
User interface
language
3
3a
3b
3c
3d
3e
Set date
On-time
for display illumination / tester
Set time
Menu Selection for Operating Parameters
Bluetooth
®
and Brightness Plus Contrast Settings Set Time, Language, Profiles, Acoustic Signal
Set date
Select time/date
Increase
Increase
hours
Activate
settings
minutes
3a
Increase
seconds
Return to submenu
Decrease
Decrease
hours
minutes
Decrease
seconds
Select time/date
Increase
Increase
day
Activate
settings
month
3b
Increase
year
Return to submenu
Decrease
Decrease
day
month
Decrease
year
Enter and select a new inspector
(change/deletion via ETC only)
3h
3f
5
logged in test technician
DB-MODE submenu

3g
10 GMC-I Messtechnik GmbH
Significance of Individual Parameters
Test Instrument On-Time
The period of time after which the test instrument is automatically
shut off can be selected here. This selection has a considerable
influence on the service life and the charging status of the batter-
ies.
On-Time for LCD Illumination
The period of time after which LCD illumination is automatically
shut off can be selected here. This selection has a considerable
influence on the service life and the charging status of the batter-
ies.
Submenu: Rotary Switch Balancing
Proceed as follows in order to precision adjust the rotary switch:
1 Press the TESTS Rotary Switch / Battery Test softkey in order to
access the rotary switch balancing menu.
2 Then press the softkey with the rotary switch symbol.
3 Turn the rotary switch clockwise to the next respective measuring
function (IDN first after SETUP).
4 Press the softkey which is assigned to the rotary switch at the LCD.
After pressing this softkey, the display is switched to the next mea-
suring function. Labeling in the LCD image must correspond to the
actual position of the rotary switch.
The
level bar in the LCD image of the rotary switch should be
located in the middle of the black field, and is supplemented at
the right-hand side with a number within a range of -1 to 101.
This value should be between 45 and 55. In the case of -1 or 101,
the position of rotary knob does not coincide with the measuring
function selected at the LCD.
5 If the displayed value is not within this range, readjust the
position by pressing the readjust softkey. A brief acoustic
signal acknowledges readjustment.
Note
If labeling in the LCD image of the rotary switch does not
correspond with its actual position, a continuous acous-
tic signal is generated as a warning when the readjust
softkey is pressed.
6 Return to point 2 and continue. Repeat this procedure until all
rotary switch functions have been tested, and if necessary
readjusted.
➭ Press ESC in order to return to the main menu.
Submenu: Battery Level Query
If battery voltage has dropped to 8.0 V or less, the UL/RL LED lights
up red and an acoustic signal is generated as well.
Note
Measuring Sequence
If battery voltage drops to below 8.0 V
during the course of a measuring
sequence, this is indicated by means of
a pop-up window only. Measured val-
ues are invalid. The measurement results cannot be
saved to memory.
➭ Press ESC in order to return to the main menu.
Attention!
!
Data and sequences are lost
when the language, the profile or
DB mode is changed, or if the in-
strument is reset to default val-
ues!
Back up your structures,
measurement data and se-
quences to a PC before
pressing the respective key.
The prompt window shown at
the right asks you to confirm
deletion.
User Interface Language (CULTURE)
➭ Select the desired country setup with the appropriate country
code. Attention: all existing structures, data and sequences are de-
leted, see note above!
Profiles for Distributor Structures (PROFILES)
The profiles are laid out in
a tree structure. The tree
structure for the utilized
PC evaluation program
may differ from that of the
PROFITEST MASTER. For
this reason, the
PROFITEST MASTER pro-
vides the user with the
opportunity of adapting
this structure.
Selecting a suitable profile
determines which object
combinations are made
possible. For example,
this makes it possible to
create a distributor which is subordinate to another, or to save a
measurement to a given building.
➭ Select the PC evaluation program you intend to use.
Attention: all existing structures, data and sequences are deleted,
see note above!
If you have not selected a suitable PC evalua-
tion program and, for example, if measured
value storage to the selected location within the
structure is not possible, the pop-up window
shown at the right appears.
Default Settings (GOME SETTING)
The test instrument is returned to its original default settings when
this key is activated.
Attention: all existing structures, data and sequences are deleted, see
note above!
Adjusting Brightness and Contrast
0a
0b
2
2
3c
3d
3e
3f
Return to previous menu
Increase brightness
Decrease brightness
Increase contrast
Decrease contrast
GMC-I Messtechnik GmbH 11
DB MODE – Presenting the Database in Text Mode or ID Mode
The DB MODE functions are
available as of firmware ver-
sion 01.05.00 of the test
instrument and as of ETC
version 01.31.00.
Creating Structures in TXT MODE
By default, the database in the test instrument is set to text mode,
„TXT“ is indicated in the header. You can create structural ele-
ments in the test instrument und add designations in plain text,
e. g. Customer XY, Distributor XY and Electrical Circuit XY.
Creating Structures in ID MODE
Alternatively, you can work in the ID mode. „ID“ is indicated in the
header. You can create structural elements in the test instrument
which can be labelled with ID numbers at your discretion.
Note
When data are transferred from the test instrument to the
PC or ETC, ETC always retains the presentation (TXT or
ID mode) selected in the test instrument.
When data are transferred from the PC or ETC to the test
instrument, the test instrument always retains the presen-
tation selected in ETC.
So, the respective receiver of the data always adopts the
presentation of the sender.
Note
In the test instrument, structures can either be created in
text mode or in ID mode.
In the ETC software, however, designations and ID num-
bers are always allocated.
If no texts or ID numbers have been allocated when creating the
structures in the test instrument, ETC generates the missing
entries automatically. They can be subsequently edited in the ETC
software and transferred back to the test instrument if required.
Switching Bluetooth
®
On/Off (
MTECH+/MXTRA/
SECULIFE IP
only)
If your PC is equipped with a Bluetooth
®
interface, wireless com-
munication is possible between the MTECH+, MXTRA or SECULIFE IP
and ETC user software for the transfer of data and test structures.
One-time only authentication of the respective PC with the test
instrument is a prerequisite for wireless data exchange. The func-
tion selector switch must be in the SETUP position to this end.
The correct Bluetooth
®
COM port must also be selected in ETC
before each data transmission sequence.
Note
Activate the Bluetooth
®
interface at the test instrument dur-
ing data transmission only. Interface power consumption
reduces battery service life when activated continuously.
If several test instruments are within range during authentication,
the respective name should be changed in order to rule out the
possibility of a mix-up. Blanks may not be used. The default pin
code, namely “0000”, can be changed, but this is unnecessary as
a rule. As shown in figure 3, the MAC address of the test instru-
ment is displayed in the footer as hardware information.
Render your test instrument visible prior to authentication, and
subsequently invisible for security reasons.
3g
3h
When Bluetooth
®
is
active (= ON), the
Bluetooth
®
icon
appears in the
header instead of BAT, and
an interface icon appears
instead of MEM.
A closed interface icon indicates
an active Bluetooth connection
with data transmission.
Figure 1
Figure 2
Figure 3 Figure 4
12 GMC-I Messtechnik GmbH
Steps Required for Authentication
Make sure that the test instrument is within range of the PC
(roughly 5 to 8 meters). Activate Bluetooth
®
at the test instrument
(see figure 1) and at your PC.
The function selector switch must be in the SETUP position to this end.
Make sure that the test instrument (see figure 3) and your PC are
visible for other Bluetooth
®
devices:
In the case of the test instrument, the word “visible” must be dis-
played underneath the eye symbol.
Use your Bluetooth
®
PC driver software to add a new Bluetooth
®
device. In most cases, this is accomplished with the help of the
“Add new connection” or “Add Bluetooth
®
device” button.
The following steps may vary, depending on which Bluetooth
®
PC
driver software is used. Basically, a PIN code must be entered at
the PC. The default setting for the PIN code is “0000”, and is dis-
played in the main Bluetooth
®
menu (see figure 1) at the test instru-
ment. Subsequently, or previously, an authentication message
must be acknowledged at the test instrument (see figure 4).
If authentication has been successful, a corresponding message
appears at the test instrument. Furthermore, the authenticated
PC is displayed in the “Trusted Devices” menu at the test instru-
ment (see figure 2).
The MTECH+, MXTRA or the SECULIFE IP should now also be listed
as a device in your Bluetooth
®
PC driver software. Further informa-
tion is also provided here regarding the utilized COM port. With
the help of your Bluetooth
®
PC driver software, you’ll need to find
out which COM port is used for the Bluetooth
®
connection. This
port is frequently displayed after authentication, but if this is not
the case, this information provided by your Bluetooth
®
PC driver
software.
ETC includes a function for automatically ascertaining the utilized COM port
after successful authentication has been completed (see screenshot below).
If the test instrument is within range of your PC (5 to 8 meters),
wireless data exchange can now be initiated with the help of ETC
by clicking Bluetooth
®
in the “Extras” menu. The number of the cor-
rect COM port (e.g. COM40) must be entered to ETC when data
exchange is started (see screenshot below).
Alternatively, the COM port number can be selected automatically by clicking
the “Find Bluetooth Device” item in the menu.
Firmware Revision and Calibration Information (example)
➭ Press any key in order to return to the main menu.
Firmware Update with the MASTER Updater
The layout used for the entire range of the test instruments makes
it possible to adapt instrument software to the latest standards
and regulations. Beyond this, suggestions from customers result
in continuous improvement of the test instrument software, as
well as new functions.
In order to assure that you can take advantage of all of these ben-
efits without delay, the MASTER Updater allows you to quickly
and completely update your test instrument software on-site.
The user interface can be set to either English, German or Italian.
Note
As a registered user, you’re entitled to download the
MASTER Updater and the current firmware version free of
charge from the myGMC page.
Entering and Selecting a New Inspector
See also section 5.7 page 15 regarding the entry of a text.
4
5
GMC-I Messtechnik GmbH 13
5 General Notes
5.1 Connecting the Instrument
For systems with earthing contact sockets, connect the instru-
ment to the mains with the test plug to which the appropriate,
country-specific plug insert is attached. Voltage between phase
conductor L and the PE protective conductor may not exceed
253 V!
Poling at the socket need not be taken into consideration. The
instrument detects the positions of phase conductor L and neu-
tral conductor N and automatically reverses polarity if necessary.
This does not apply to the following measurements:
– Voltage measurement in switch position U
– Insulation resistance measurement
– Low-value resistance measurement
The positions of phase conductor L and neutral conductor N are
identified on the plug insert.
If measurement is to be performed at three-phase outlets, at dis-
tribution cabinets or at permanent connections, the measuring
adapter must be attached to the test plug (see also table 16.1).
Connection is established with the test probes: one at PE or N
and the other at L.
The 2-pole measuring adapter must be expanded to 3 poles with
the included measurement cable for the performance of phase
sequence testing.
Contact voltage (during RCCB testing) and earthing resistance
can be, and earth-electrode potential, standing surface insulation
resistance and probe voltage must be measured with a probe.
The probe is connected to the probe connector socket with a
4 mm contact protected plug.
5.2 Automatic Settings, Monitoring and Shut-Off
The test instrument automatically selects all operating conditions
which it is capable of determining itself. It tests line voltage and
frequency. If these lie within their valid nominal ranges, they
appear at the display panel. If they are not within nominal ranges,
prevailing voltage (U) and frequency (f) are displayed instead of U
N
and f
N
.
Contact voltage which is induced by test current is monitored for
each measuring sequence. If contact voltage exceeds the limit
value of > 25 V or > 50 V, measurement is immediately inter-
rupted. The U
L
/R
L
LED lights up red.
If battery voltage falls below the allowable limit value the instrument
cannot be switched on, or it is immediately switched off.
The measurement is interrupted automatically, or the measuring
sequence is blocked (except for voltage measuring ranges and
phase sequence testing) in the event of:
• Impermissible line voltages (< 60 V, > 253 V / > 330 V /
> 440 V or > 550 V) for measurements which require line volt-
age
• Interference voltage during insulation resistance or low resis-
tance measurements
• Overheating at the instrument.
As a rule, excessive temperatures only occur after approxi-
mately 50 measurement sequences at intervals of 5 seconds,
when the rotary selector switch is set to the Z
L-PE
oder Z
L-N
position.
If an attempt is made to start a measuring sequence, an
appropriate message appears at the display panel.
The instrument only switches itself off automatically after comple-
tion of an automatic measuring sequence, and after the predeter-
mined on-time has expired (see sectionl 4.3). On-time is reset to
its original value as defined in the setup menu, as soon as any key
or the rotary selector switch is activated.
The instrument remains on for approximately 75 seconds in addi-
tion to the preset on-time for measurements with rising residual
current in systems with selective RCDs.
The instrument always shuts itself off automatically!
5.3 Measurement Value Display and Memory
The following appear at the display panel:
• Measurement values with abbreviations and units of measure
• Selected function
• Nominal voltage
• Nominal frequency
• Error messages
Measurement values for automatic measuring sequences are
stored and displayed as digital values until the next measurement
sequence is started, or until automatic shut-off occurs.
If the upper range limit is exceeded, the upper limit value is dis-
played and is preceded by the “>” symbol (greater than), which
indicates measurement value overrun.
Note
The depiction of LEDs in these operating instructions
may vary from the LEDs on the actual instrument due to
product improvements.
5.4 Testing Earthing Contact Sockets for Correct Connection
The testing of earthing contact sockets for correct connection
prior to protective measures testing is simplified by means of the
instrument’s error detection system.
The instrument indicates improper connection as follows:
• Impermissible line voltage (< 60 V or > 253 V):
The MAINS/NETZ LED blinks red and the measuring
sequence is disabled.
• Protective conductor not connected or potential to earth 50 V
at 50 Hz (switch position U – single-phase measurement):
If the contact surfaces are touched (finger contact*) while PE is
being contacted (via the country-specific plug insert, e.g.
SCHUKO, as well as via the PE test probe at the 2-pole
adapter) PE appears (only after a test sequence has been
started). The U
L
/R
L
and RCD/FI LEDs light up red as well.
* for reliably detecting the contact voltages, both sensor surfaces at
the test plug must be touched directly with the finger/palm without
any skin protection applied, see also section 4.1.
• Neutral conductor N not connected (during mains dependent
measurements):
The MAINS/NETZ LED blinks green.
• One of the two protective contacts is not connected:
This is checked automatically during testing for contact cur-
rent U
IN
. Poor contact resistance at one of the contacts
leads to one of the following displays, depending upon poling
of the plug:
– Display at the connection pictograph:
PE interrupted (x), or underlying protective
conductor bar interrupted with reference
to keys at the test plug
Cause: voltage measuring path interrupted
Consequence: measurement is disabled
– Display at the connection pictograph:
Overlying protective conductor bar inter-
rupted with reference to keys at the test
plug
Cause: current measuring path interrupted
Consequence: no measured value display
Note
See also “LED Indications, Mains Connections and
Potential Differences” beginning on page 73.
Attention!
!
Reversal of N and PE in a system without RCCBs cannot
be detected and is not indicated by the instrument.
In a system including an RCCB, the RCCB is tripped
during “contact voltage measurement without RCCB
tripping” (automatic Z
L-N
measurement), insofar as N and
PE are reversed.
14 GMC-I Messtechnik GmbH
5.5 Help Function
The following information can be displayed for each switch posi-
tion and basic function after it has been selected with the rotary selec-
tor switch:
• Wiring diagram
• Measuring range
• Nominal range of use and measuring uncertainty
• Nominal value
➭ Press the HELP key in order to query online help:
➭ If several pages of help are available for the respective mea-
suring function, the HELP key must be pressed repeatedly.
➭ Press the ESC key in order to exit online help.
5.6 Setting Parameters or Limit Values using RCD Measurement as an Example
1 Access the submenu for setting the desired parameter.
2 Select a parameter using the orscroll key.
3 Switch to the setting menu for the selected parameter with the scroll
key.
4 Select a setting value using the orscroll key.
5 Acknowledge the setting value with the key. This value is transferred to
the setting menu.
6 The setting value is not permanently accepted for the respective measure-
ment until
3 is pressed, after which the display is returned to the main
menu. You can return to the main menu by pressing ESC instead of
3,
without accepting the newly selected value.
Parameter Lock (plausibility check)
Individually selected parameter settings are checked for plausibil-
ity before transfer to the measurement window.
If you select a parameter setting which doesn’t make sense in
combination with other parameter settings which have already
been entered, it’s not accepted. The previously selected parame-
ter setting remains unchanged.
Remedy: Select another parameter setting.
1
2
2
3
4
4
5
6
2
4
3
5
6
GMC-I Messtechnik GmbH 15
5.7 Freely Selectable Parameter Settings or Limit Values
In addition to fixed values, other values can be freely selected
within predefined limits for certain parameters, if the symbol for
the EDIT menu (3) appears at the end of the list of setting values.
Freely Selecting a Limit Value or Nominal Voltage
1 Open the submenu for setting the desired parameter (no figure, see section
5.6).
2 Select parameter (U
L
) using the orscroll key (no figure, see section
5.6).
3 Select a setting value with the help of the icon and the orscroll
key.
4 Select the edit menu: Press the key with the icon.
5 Select the desired value or unit of measure with the LEFT or RIGHT scroll
key. The value or unit of measure is accepted by pressing the key. The
entire value is acknowledged by selecting
3 and then pressing the key.
The new limit value or nominal value is added to the list.
Note
Observe predefined limits for the new setting value.
New, freely selected limit values or nominal values
included in the parameters list can be deleted/edited at
the PC with the help of ETC software.
When the upper limit value is exceeded, this value is
accepted (in the example: 65 V), when the limit value is
fallen short of, the predefined lower limit value (25 V) is
accepted.
5.8 2-Pole Measurement with Fast or Semiautomatic Polarity
Reversal
Fast, semiautomatic polarity reversal is possible for the following
measurements:
• Voltage U
• Loop impedance Z
LP-E
• Internal line resistance measurement Z
L-N
• Insulation resistance, R
ISO
Fast Polarity Reversal at the Test Plug
The polarity parameter is set to AUTO.
Fast and convenient switching amongst all polarity variants, or
switching to the parameter settings submenu, is possible by
pressing the I
N
key at the instrument or the test plug.
Semiautomatic Polarity Reversal in Memory Mode
The polarity parameter is set to AUTO.
If testing is to be conducted with all polarity variants, automatic
polarity changing takes place after each measurement when the
“Save” button is pressed.
Polarity variants can be skipped by pressing the I
N
key at the
instrument or the test plug.
Select value / U/M.
Select value / U/M.
Accept value / U/M.
Delete characters.
3 Save value (to list).
Select editable value.
Select editable value.
Select the EDIT menu.
3
4
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
L1-PE
L2-PE
L3-PE
N-PE
L+N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
Z
L-PE
Z
L-N
L1-PE
L2-PE
L3-PE
R
iso
L1-PE
L2-PE
L3-PE
N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
U
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
L1-PE
L2-PE
L3-PE
N-PE
L+N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
Z
L-PE
Z
L-N
L1-PE
L2-PE
L3-PE
R
iso
L1-PE
L2-PE
L3-PE
N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
U
16 GMC-I Messtechnik GmbH
6 Measuring Voltage and Frequency
Select Measuring Function
Switch Between Single and 3-Phase Measurement
Press the softkey shown at the left in order to switch
back and forth between single and 3-phase mea-
surement. The selected phase measurement is dis-
played inversely (white on black).
6.1 Single-Phase Measurement
Connection
A probe must be used in order to measure probe voltage U
S-PE
.
6.1.1 Voltage Between L and N (U
L-N
),
L and PE
(U
L-PE
)
a
nd N and PE
(U
N-PE
) with Country-Specific Plug Insert, e.g.
SCHUKO
Press the softkey shown at the left in order to switch
back and forth between the country-specific plug
insert, e.g. SCHUKO, and the 2-pole adapter. The
selected connection type is displayed inversely
(white on black).
6.1.2 Voltage between L – PE, N – PE and L – L
with 2-Pole Adapter Connection
Press the softkey shown at the left in order to switch
back and forth between the country-specific plug
insert, e.g. SCHUKO, and the 2-pole adapter. The
selected connection type is displayed inversely
(white on black).
Refer to section 5.8 regarding 2-pole measurement with fast or
semiautomatic polarity reversal.
U
2
1
GMC-I Messtechnik GmbH 17
6.2 3-Phase Measurement (line-to-line voltage) and Phase
Sequence
Connection
The measuring adapter
(2-pole) is required in
order to connect the
instrument, and can be
expanded to a 3-pole
measuring adapter with
the included measure-
ment cable.
➭ Press softkey U3~.
A clockwise phase
sequence is required at all 3-phase electrical outlets.
• Measurement instrument connection is usually problematic with
CEE outlets due to contact problems.
Measurements can be executed quickly and reliably without con-
tact problems with the help of the Z500A variable plug adapter
set available from GMC.
• Connection for 3-wire measurement, plug L1-L2-L3 in clockwise
direction as of PE socket
Direction of rotation is indicated by means of the following dis-
plays:
Note
See section 18 regarding all indications for the mains
connection test.
Voltage Polarity
If the installation of single-pole switches to the neutral conductor
is prohibited by the standards, voltage polarity must be tested in
order to assure that all existing single-pole switches are installed
to the phase conductors.
7 Testing RCDs
The testing of residual current devices (RCDs) includes:
• Visual inspection
•Testing
• Measurement
Use the test instrument for testing and measurement.
Measuring Method
The following must be substantiated by generating a fault current
downstream from the RCD:
• That the RCD is tripped no later than upon reaching its nomi-
nal fault current value
• That the continuously allowable contact voltage value U
L
agreed upon for the respective system is not exceeded
This is achieved by means of:
• Contact voltage measurement, 10 measurements with full-
waves and extrapolation of I
N
• Substantiation of tripping within 400 ms or 200 ms with I
N
• Substantiation of tripping with current rising residual current:
This value must be between 50% and 100% of I
N
(usually
about 70%).
• No premature tripping with the test instrument, because test-
ing is begun with 30% residual current (if no bias current
occurs within the system).
* PROFITEST MTECH+, PROFITEST MXTRA & SECULIFE IP
Clockwise
Counter-Clockwise
RCD/FI Table Type of Differential
Current
Correct RCD/RCCB
Function
Type AC
Type A, F
Type B*/
B+*
Type EV*
Alternating
current
Suddenly occurring
4444
Slowly rising
Pulsating di-
rect current
Suddenly occurring
444
Slowly rising
Direct current
44
Direct current
up to 6 mA
4
I
N
3
-------
I
N
(measurement up to 1000 ms)
t
a
I
a
t
18 GMC-I Messtechnik GmbH
Test Standard
The following must be substantiated per DIN VDE 0100 part 600:
2008:
– Contact voltage occurring at nominal residual current may not
exceed the maximum allowable value for the system.
– Tripping of the RCCB must occur within 400 ms (1000 ms for
selective RCDs) at nominal residual current.
Important Notes
•The PROFITEST MASTER allows for simple measurements at all
types of RCDs. Select RCD, SRCD, PRCD etc.
• Measurement must be executed at one point only per RCD
(RCCB) within the connected electrical circuits. Low-resis-
tance continuity must be substantiated for the protective con-
ductor at all other connections within the electrical circuit (R
LO
or U
B
).
• The measuring instruments often display a contact voltage of
0.1 V in TN systems due to low protective conductor resis-
tance.
• Be aware of any bias currents within the system. These may
cause tripping of the RCDs during measurement of contact
voltage U
B
, or may result in erroneous displays for measure-
ments with rising current:
Display = I
F
- I
bias_current
• Selective RCDs identified with an can be used as the sole
means of protection for automatic shutdown if they adhere to
the same shutdown conditions as non-selective RCDs (i.e.
t
a
< 400 ms). This can be substantiated by measuring shut-
down time.
• Type B RCDs may not be connected in series with type A
RCDs.
Note
Bias Magnetization
Only AC measurements can be performed with the 2-
pole adapter. Suppression of RCD tripping by means of
bias magnetization with direct current is only possible via
a country-specific plug insert, e.g. SCHUKO, or the 3-
pole adapter.
Measurement With or Without Probe
Measurements can be performed with or without a probe.
Measurements with probe require that the probe and reference
earth are of like potential. This means that the probe must be
positioned outside of the potential gradient area of the earth elec-
trode (R
E
) in the RCD safety circuit.
The distance between the earth electrode and the probe should
be at least 20 m.
The probe is connected with a 4 mm contact protected plug.
In most cases this measurement is performed without probe.
Attention!
!
The probe is part of the measuring circuit and may carry
a current of up to 3.5 mA in accordance with VDE 0413.
Testing for the absence of voltage at the probe can be performed
with the U
PROBE
function (see also section 6.1 on page 16).
7.1 Measuring Contact Voltage (with reference to nominal
residual current) with
1
/
3
Nominal Residual Current and
Tripping Test with Nominal Residual Current
Select Measuring Function
Connection
Set Parameters for I
N
S
I
N
Nominal residual
Type 1: RCD, SRCD, PRCD etc.
Nominal current: 6 ... 125 A
Type 2: AC , A/F , B/B+ *
EV
* Type B/B+/EV = AC/DC sensitive
current:
10 ... 500 mA
Phase displacement: 0°/180°
X times tripping current:
Negative/positive half-wave
Negative/positive direct current
1, 2, 5 (I
N
max. 300 mA)
Waveform:
Connection:
without/with probe
System type:
TN/TT, IT
Contact voltage:
Time to trip:
< 25 V, < 50 V, < 65 V
GMC-I Messtechnik GmbH 19
1) Measuring Contact Current Without Tripping the RCD
Measuring Method
The instrument uses a measuring current of only 1/3 nominal
residual current for the determination of contact voltage U
IN
which occurs at nominal residual current. This prevents tripping of
the RCCB.
This measuring method is especially advantageous, because
contact voltage can be measured quickly and easily at any electri-
cal outlet without tripping the RCCB.
The usual, complex measuring method involving testing for the
proper functioning of the RCD at a given point, and subsequent
substantiation that all other systems components requiring pro-
tection are reliably connected at low resistance values to the
selected measuring point via the PE conductor, is made unneces-
sary.
N-PE Reversal Test
Additional testing is conducted in order to
determine whether or not N and PE are
reversed. The pop-up window shown at
the right appears in the event of reversal.
Attention!
!
Execute a data backup before starting measurement and
switch off all consumers in order to prevent the loss of
data in data processing systems.
Start Measurement
Amongst other values, contact voltage U
IN
and calculated earth-
ing resistance R
E
appear at the display panel.
Note
The measured earthing resistance value R
E
is acquired
with very little current. More accurate results can be
obtained with the selector switch in the R
E
position.
The DC + function can be selected here for sys-
tems with RCCBs.
Unintentional Tripping of the RCD due to Bias Current within the System
If bias currents should occur, they can be measured with the help
of a current clamp transformer as described in section 13.1 on
page 50. The RCCB may be tripped during the contact voltage
test if extremely large bias currents are present within the system,
or if a test current was selected which is too great for the RCCB.
After contact voltage has been measured, testing can be per-
formed to determine whether or not the RCCB is tripped within
the selected time limits at nominal residual current.
Unintentional Tripping of the RCD due to Leakage Current in the Measur-
ing Circuit
Measurement of contact voltage with 30% nominal residual cur-
rent does not normally trip an RCCB. However, the trip limit may
be exceeded as a result of leakage current in the measuring cir-
cuit, e.g. due to interconnected power consumers with EMC cir-
cuit, e.g. frequency converters and PCs.
2) Tripping Test after the Measurement of Contact Voltage
➭ Press the
I
N
key.
The tripping test need
only be performed at
one measuring point for
each RCCB.
If the RCCB is tripped at nominal residual current,
the MAINS/NETZ LED blinks red (line voltage disconnected) and
time to trip t
a
and earthing resistance R
E
appear at the display
panel.
If the RCCB is not tripped at nominal residual current,
the RCD/FI LED lights up red.
Contact Voltage Too High
If contact voltage U
IN
, which has been measured with 1/3 nomi-
nal residual current I
N
and extrapolated to I
N
, is > 50 V (> 25 V),
the U
L
/R
L
LED lights up red.
If contact voltage U
IN
exceeds 50 V (25 V) during the measuring
sequence, safety shut-down occurs.
Note
Safety Shut-down: At up to 70 V, a safety shut-down is
tripped within 3 seconds in accordance with IEC 61010.
Contact voltages of up to 70 V are displayed. If contact voltage is
greater than 70 V, U
IN
> 70 V is displayed.
Limit Values for Allowable, Continuous Contact Voltage
The limit for allowable, continuous contact voltage is U
L
=50V for
alternating voltages (international agreement). Lower values have
been established for special applications (e.g. medical applica-
tions: U
L
=25V).
Attention!
!
If contact voltage is too high, or if the RCCB is not
tripped, the system must be repaired (e.g. earthing resis-
tance is too high, defective RCCB etc.)!
3-Phase Connections
For proper RCD testing at three-phase connections, the tripping
test must be conducted for one of the three phase conductors
(L1, L2 and L3).
Inductive Power Consumers
Voltage peaks may occur within the measuring circuit if inductive
consumers are shut down during an RCCB trip test. If this is the
case, the test instrument may display the following message: No
measured value (– – – ). If this message appears, switch all power
consumers off before performing the trip test. In extreme cases,
one of the fuses in the test instrument may blow, and/or the test
instrument may be damaged.
20 GMC-I Messtechnik GmbH
7.2 Special Testing for Systems and RCCBs
7.2.1 Testing Systems and RCCBs with Rising Residual Current
(AC) for Type AC, A/F, B/B+ and EV RCDs
Measuring Method
The instrument generates a continuously rising residual current of
(0.3 to 1.3) I
N
within the system for the testing of RCDs.
The instrument stores the contact voltage and tripping current
values which were measured at the moment tripping of the RCCB
occurred, and displays them.
One of contact voltage limit values, U
L
=25V or U
L
=50V/65V,
can be selected for measurement with rising residual current.
Select Measuring Function
Connection
Set Parameters for I
F
Start Measurement
Measuring Sequence
After the measuring sequence has been started, the test current
generated by the instrument is continuously increased starting at
0.3 times nominal residual current, until the RCCB is tripped. This
can be observed by viewing gradual filling of the triangle at I.
If contact voltage reaches the selected limit value (U
L
=65V, 50V
or 25 V) before the RCCB is tripped, safety shut-down occurs.
The U
L
/R
L
LED lights up red.
Note
Safety Shut-down: At up to 70 V, a safety shut-down is
tripped within 3 seconds in accordance with IEC 61010.
If the RCCB is not tripped before the rising current reaches nomi-
nal residual current I
N
, the RCD/FI LED lights up red.
Attention!
!
If bias current is present within the system during mea-
surement, it is superimposed onto the residual current
which is generated by the instrument and influences
measured values for contact voltage and tripping cur-
rent. See also section 7.1.
Evaluation
According to DIN VDE 0100, Part 600, rising residual current
must, however, be used for measurements in the evaluation of
RCDs, and contact voltage at nominal residual current I
N
must
be calculated from the measured values.
The faster, more simple measuring method should thus be taken
advantage of (see sectionl 7.1).
7.2.2 Testing Systems and RCCBs with Rising Residual Current
(AC) for Type B/B+ and EV RCDs (nur MTECH+, MXTRA &
SECULIFE IP)
In accordance with VDE 0413, part 6, it must be substantiated
that, with smooth direct current, residual operating current is no
more than twice the value of rated residual current I
N
. A continu-
ously rising direct current, beginning with 0.2 times rated residual
current I
N
, must be applied to this end. If current rise is linear, ris-
ing current may not exceed twice the value of I
N
within a period
of 5 seconds.
Testing with smoothed direct current must be possible in both
test current directions.
I
F
Nominal residual current:
Type 1: RCD, SRCD, PRCD etc.
Nominal current: 6 ... 125 A
Type 2: AC , A/F , B/B+ *
EV
* Type B/B+/EV = AC/DC sensitive
10 ... 500 mA
sine
Negative/positive half-wave
Waveform:
Connection:
without/with probe
System type:
TN/TT, IT
Negative/positive direct current
Contact voltage:
Tripping limit values:
GMC-I Messtechnik GmbH 21
7.2.3 Testing RCCBS with 5 I
N
The measurement of time to trip is performed here with 5 times
nominal residual current.
Note
Measurements performed with 5 times nominal fault cur-
rent are required for testing type and G RCCBs in the
manufacturing process. They are used for personal
safety as well.
Measurement can be started with the positive half-wave at “0°” or
with the negative half-wave at “180°”.
Both measurements must nevertheless be performed. The longer
of the two tripping times is decisive regarding the condition of the
tested RCCB. Both values must be less than 40 ms.
Select Measuring Function
Set the Parameter – Start with Positive or Negative Half-Wave
Set the Parameter – 5 Times Nominal Current
Note
The following restrictions apply to the selection of tripping
current multiples relative to nominal current:
500 mA: 1 x, 2 x I
N
Start Measurement
7.2.4 Testing of RCCBs which are Suited for
Pulsating DC Residual Current
In this case, RCCBs can be tested with either positive or negative
half-waves. The standard calls for tripping at 1.4 times nominal
current.
Select Measuring Function
Set the Parameter – Positive or Negative Half-Wave
Set the Parameter – Test With and Without “Non-Tripping Test”
Non-Tripping Test
If, during the non-tripping test which lasts for 1
second, the RCD trips too early at 50% I
N
, i.e.
before the actual tripping test starts, the pop-up
window shown at the right appears.
Note
The following restriction applies to the selection of trip-
ping current multiples relative to nominal current: Double
and five-fold nominal current is not possible in this case.
Note
According to DIN EN 50178 (VDE 160), only type B
RCCBs (AC-DC sensitive) can be used for equipment
with > 4 kVA, which is capable of generating smooth DC
residual current (e.g. frequency converters).
Tests with pulsating DC fault current only are not suitable
for these RCCBs. Testing must also be conducted with
smooth DC residual current in this case.
Note
Measurement is performed with positive and negative
half-waves for testing RCCBs during manufacturing. If a
circuit is charged with pulsating direct current, the func-
tion of the RCCB can be executed with this test in order
to assure that the RCCB is not saturated by the pulsating
direct current so that it no longer trips.
S
I
N
Negative direct current
Positive direct current
Waveform:
180°: Start with neg. half-wave
0°: Start with pos. half-wave
5 times tripping current
X times tripping current:
I
N
Neg. half-wave
Pos. half-wave
Negative direct current
Positive direct current
Waveform:
X times tripping current:
50% I
N
*
* Non-tripping test
with 50% I
N
22 GMC-I Messtechnik GmbH
7.3 Testing for Special RCDs
7.3.1 System, Type RCD-S Selective RCCBs
Selective RCDs are used in systems which include two series
connected RCCBs which are not tripped simultaneously in the
event of a fault. These selective RCDs demonstrate delayed
response characteristics and are identified with the symbol.
Measuring Method
The same measuring method is used as for standard RCCBs (see
sections 7.1 on page 18 and 7.2.1 on page 20).
If selective RCDs are used, earthing resistance may not exceed
half of the value for standard RCCBs.
For this reason, the instrument displays twice the measured value
for contact voltage.
Select Measuring Function
Set Parameter – Selective
Start Measurement
Tripping Test
➭ Press the I
N
key. The RCCB is tripped. Blinking bars appear
at the display panel, after which time to trip t
A
and earthing re-
sistance R
E
are displayed.
The tripping test need
only be performed at
one measuring point for
each RCCB.
Note
Selective RCDs demonstrate delayed response charac-
teristics. Tripping performance is briefly influenced (up to
30 s) due to pre-loading during measurement of contact
voltage. In order to eliminate pre-charging caused by the
measurement of contact voltage, a waiting period must
be observed prior to the tripping test. After the measuring
sequence has been started (tripping test), blinking bars
are displayed for approximately 30 seconds. Tripping
times of up to 1000 ms are allowable. The tripping test is
executed immediately after once again pressing the I
N
key.
7.3.2 PRCDs with Non-Linear Type PRCD-K Elements
The PRCD-K is a portable RCD with electronic residual current
evaluation laid out as an in-line device which switches all poles (L,
N and PE). An undervoltage trigger and protective conductor
monitoring are additionally integrated into the PRCD-K.
The PRCD-K is equipped with an undervoltage trigger, for which
reason it has to be operated with line voltage, and measurements
may only be performed in the on state (PRCD-K switches all
poles).
Terminology (from DIN VDE 0661)
Portable protective devices are circuit breakers which can be con-
nected between power consuming devices and permanently
installed electrical outlets by means of standardized plug-and-
socket devices.
A reusable, portable protective device is a protective device which
is designed such that it can be connected to movable cables.
Please be aware that a non-linear element is usually integrated
into PRCDs, which leads to immediate exceeding of the greatest
allowable contact voltage during U
I
measurements (U
I
greater
than 50 V).
PRCDs which do not include a non-linear element in the protec-
tive conductor must be tested in accordance with section 7.3.3
on page 23.
Objective (from DIN VDE 0661)
Portable residual current devices (PRCDs) serve to protect per-
sons and property. They allow for the attainment of increased lev-
els of protection as provided by protective measures utilized in
electrical systems for the prevention of electrical shock as defined
in DIN VDE 0100, part 410. They are to be designed such that
they can be installed by means of a plug attached directly to the
protective device, or by means of a plug with a short cable.
S
I
N
I
F
or
Type 1:
GMC-I Messtechnik GmbH 23
Measuring Method
The following can be measured, depending upon the measuring
method:
•Time to trip t
A
: tripping test with nominal residual current I
N
(The PRCD-K must be tripped at 50% nominal current.)
• Tripping current I
: testing with rising residual current I
F
Select Measuring Function
Connection
Set the Parameter – PRCD with Non-Linear Elements
Start Measurement
7.3.3 SRCD, PRCD-S (SCHUKOMAT, SIDOS or comparable)
RCCBs from the SCHUKOMAT SIDOS series, as well as others
which are of identical electrical design, must be tested after
selecting the corresponding parameter.
Monitoring of the PE conductor is performed for RCDs of this
type. The PE conductor is monitored by the summation current
transformer. If residual current flows from L to PE, tripping current
is cut in half, i.e. the RCCB must be tripped at 50% nominal resid-
ual current I
N
.
Whether or not PRCDs and selective RCDs are of like design can
be tested by measuring contact voltage U
IN
. If a contact voltage
U
IN
of greater than 70 V is measured at the PRCD of an other-
wise error-free system, the PRCD more than likely contains a non-
linear element.
PRCD-S
The PRCD-S (portable residual current device – safety) is a spe-
cial, portable, protective device with protective conductor detec-
tion or protective conductor monitoring. The device serves to pro-
tect persons from electrical accidents in the low-voltage range
(130 to 1000 V). The PRCD-S must be suitable for commercial
use, and is installed like an extension cable between an electrical
consumer – as a rule an electrical tool – and the electrical outlet.
Select Measuring Function
Set Parameter – SRCD / PRCD
Start Measurement
I
N
I
F
or
Type 1:
n
e
w
4
I
N
I
F
or
Type 1:
24 GMC-I Messtechnik GmbH
7.3.4 Type G or R RCCB
In addition to standard RCCBs and selective RCDs, the special
characteristics of the type G RCCB can also be tested with the
test instrument.
The type G RCCB is an Austrian specialty and complies with the
ÖVE/ÖNORM E 8601 device standard. Erroneous tripping is min-
imized thanks to its greater current carrying capacity and short-
term delay.
Select Measuring Function
Set Parameter – Type G/R (VSK)
Contact voltage and time to trip can be measured in the G/R-
RCD switch position.
Note
It must be observed that time to trip for type G RCCBs
may be as long as 1000 ms when measurement is made
at nominal residual current. Set the limit value corre-
spondingly.
➭ Then select 5 x I
N
in the menu (this is selected automatically
for the G/R setting) and repeat the tripping test beginning with
the positive half-wave at 0° and the negative half-wave at
180°. The longer of the two tripping times is decisive regard-
ing the condition of the tested RCCB.
Set the Parameter – Start with Positive or Negative Half-Wave
Set the Parameter – 5 Times Nominal Current
Note
The following restrictions apply to the selection of
tripping current multiples relative to nominal current:
500 mA: 1 x, 2 x I
N
Start Measurement
In both cases, tripping time must be between 10 ms (minimum
delay time for type G RCCBs!) and 40 ms.
Type G RCCBs with other nominal residual current values must
be tested with the corresponding parameter setting under menu
item I
N
. In this case as well, the limit value must be appropriately
adjusted.
Note
The RCD parameter setting for selective RCCBs is not
suitable for type G RCCBs.
I
N
Type 1:
180°: Start with neg. half-wave
0°: Start with pos. half-wave
Waveform:
Negative direct current
Positive direct current
X times tripping current:
5 times tripping current
S
GMC-I Messtechnik GmbH 25
7.4 Testing Residual Current Circuit Breakers in TN-S Systems
Connection
RCCBs can only be used in TN-S systems. An RCCB would not
work in a TN-C system because PE is directly connected to the
neutral conductor in the outlet (it does not bypass the RCCB).
This means that residual current would be returned via the RCCB
and would not generate any differential current, which is required
in order to trip the RCCB.
As a rule, the display for contact voltage is also 0.1 V, because
the nominal residual current of 30 mA together with minimal loop
resistance results in a very small voltage value:
7.5 Testing of RCD Protection in IT Systems with High Cable
Capacitance (e.g. in Norway)
The desired system type (TN/TT oder IT) can be selected for RCD
test type U
IN
(I
N
, t
a
), and for earthing measurement (R
E
).
A probe is absolutely essential for measurement in IT systems,
because contact voltage U
IN
which occurs in these systems
cannot otherwise be measured.
After selecting the IT system setting, connection with probe is
selected automatically.
Set the Parameter – Select System Type
Start Measurement
UINR
E
IN 130mA 30mV 0
·
03V,== ==
System
type:
26 GMC-I Messtechnik GmbH
8 Testing of Breaking Requirements
Overcurrent Protective Devices,
Measurement of Loop Impedance and
Determination of Short-Circuit Current
(functions Z
L-PE
and I
K
)
Testing of overcurrent protective devices includes visual inspec-
tion and measurement. Use the PROFITEST MASTER or SECULIFE IP
to perform measurements.
Measuring Method
Loop impedance Z
L-PE
is measured and short-circuit current I
K
is
ascertained in order to determine if the breaking requirements for
protective devices have been fulfilled.
Loop impedance is the resistance within the current loop (utility
station – phase conductor – protective conductor) when a short-
circuit to an exposed conductive part occurs (conductive connec-
tion between phase conductor and protective conductor). Short-
circuit current magnitude is determined by the loop impedance
value. Short-circuit current I
K
may not fall below a predetermined
value set forth by DIN VDE 0100, so that reliable breaking of the
protective device (fuse, automatic circuit breaker) is assured.
Thus the measured loop impedance value must be less than the
maximum allowable value.
Tables containing allowable display values for loop impedance
and minimum short-circuit current display values for ampere rat-
ings for various fuses and circuit breakers can be found in the
help texts and in section 21 beginning of page 88. Maximum
device error in accordance with VDE 0413 has been taken into
consideration in these tables. See also section 8.2.
In order to measure loop impedance Z
L-PE
, the instrument uses a
test current of 3.7 to 7 A (60 to 550 V) depending on line voltage
and line frequency. At 16 Hz, the test has a duration of no more
than 1200 ms.
If dangerous contact voltage occurs during measurement
(> 50 V), safety shut-down occurs.
The test instrument calculates short-circuit current I
K
based on
measured loop impedance
Z
L-PE
and line voltage. Short-circuit
current calculation is made with reference to nominal line voltage
for line voltages which lie within the nominal ranges for 120 V,
230 V and 400 V systems. If line voltage does not lie within these
nominal ranges, the instrument calculates short-circuit current I
K
based on prevailing line voltage and measured loop impedance
Z
L-PE
.
Measuring Method with Suppression of RCD Tripping
The PROFITEST MXTRA and SECULIFE IP provides users with the
opportunity of measuring loop impedance within systems which
are equipped with RCCBs.
The test instrument
generates a direct
current to this end,
which saturates the
RCCB’s magnetic
circuit.
The test instrument
then superimposes
a measuring cur-
rent which only
demonstrates half-
waves of like polar-
ity. The RCCB is no
longer capable of
detecting this mea-
suring current, and
is consequently not tripped during measurement.
A four conductor measuring cable is used between the instru-
ment and the test plug. Cable and measuring adapter resistance
is automatically compensated for during measurement and does
not effect measurement results.
Select Measuring Function
Connection:
Schuko / 3-Pole Adapter
Connection:
2-Pole Adapter
Note
Loop impedance should be measured for each electrical
circuit at the farthest point, in order to ascertain maxi-
mum loop impedance for the system.
Note
Bias Magnetization
Only AC measurements can be performed with the 2-
pole adapter. Suppression of RCD tripping by means of
bias magnetization with direct current is only possible via
a country-specific plug insert, e.g. SCHUKO, or the 3-
pole adapter (neutral conductor necessary).
Note
Observe national regulations, e.g. the necessity of con-
ducting measurements without regard for RCCBs in Aus-
tria.
3-Phase Connections
Measurement of loop impedance to earth must be performed at
all three phase conductors (L1, L2, and L3) for the testing of over-
current protective devices at three phase outlets.
Start
t1 t3
Measurement
t2
Operation
RCD Disabled!
t
I
F
/mA
Suppression of RCCB tripping for RCCBs
which are sensitive to pulsating current
Z
L-PE
GMC-I Messtechnik GmbH 27
8.1 Measurements with Suppression of RCD Tripping
8.1.1 Measurement with Positive Half-Waves
(only MTECH+/MXTRA/SECULIFE IP)
Measurement by means of half-waves plus direct current makes it
possible to measure loop impedance in systems which are
equipped with RCCBs.
For DC measurement with half-waves you can choose between
two alternatives:
DC-L: lower premagnetization current allowing for faster mea-
surement
DC-H: higher premagnetization current, therefore higher protec-
tion against tripping of RCD
Select Measuring Function
Set Parameters
* Parameters used for report generation only which do not influence the measurement
Sine (full wave) Setting for electric circuits without RCD
15 mA sinusoidal Setting only for motor protection switch
with low nominal current
DC+half-wave Setting for electric circuits with RCD
Start Measurement
Semiautomatic
Measurement
8.2 Evaluation of Measured Values
The maximum allowable
loop impedance Z
L-PE
which may be displayed
after allowance has
been made for maxi-
mum operating mea-
surement error (under
normal measuring con-
ditions) can be deter-
mined with the help of
Table 1 on page 88.
Intermediate values can
be interpolated.
The maximum allowable
nominal current for the
protective device (fuse
or circuit breaker) for a line voltage of 230 V after allowance has
been made for maximum measuring error can be determined with
the help of Table 6 on page 89 based upon measured short-cir-
cuit current (corresponds to DIN VDE 0100 Part 600).
Special Case: Suppressing Display of the Limit Value
The limit value cannot be
ascertained. The inspec-
tor is prompted to evalu-
ate the measured val-
ues himself, and to
acknowledge or reject
them with the help of the
softkeys.
Measurement passed:
key 4
Measurement failed:
X key
Z
L-PE
Tripping characteristics:
Diameter*: 1.5 to 70 sq. mm
Cable types*: NY...- H07...
Number of wires*: 2 to 10-strand
Nominal current:
2 ... 160 A, 9999 A
A, B/L, C/G, D, E, H, K, GL/GG & Factor
Sine
15 mA sinusoidal
Waveform:
DC-L offset and positive half-wave
Contact voltage:
DC-H offset and positive half-wave
2-pole
Measurement with country-specific
plug insert (e.g. Schuko)
Note
Selecting test probe and Lx-PE
reference or AUTO is only relevant for
report generation.
Semiautomatic measurement
See also section 5.8 regarding the
AUTO parameter.
Polarity selection
measurement
28 GMC-I Messtechnik GmbH
The measured value can only be saved after it has been evalu-
ated.
8.3 Settings for Short-circuit current Calculation – Parameter I
K
Short-circuit current I
K
is used to test shutdown by means of an
overcurrent protective device. In order for an overcurrent protec-
tive device to be tripped on time, short-circuit current I
K
must be
greater than tripping current Ia (see table 6 in section 21.1). The
variants which can be selected with the “Limits” key have the fol-
lowing meanings:
I
K
: Ia The measured value displayed for I
K
is used without
any correction to calculate Z
L-PE
.
I
K
: Ia+% The measured value displayed for Z
L-PE
is corrected
by an amount equal to the test instrument’s measuring
uncertainty in order to calculate I
K
.
I
K
: 2/3 Z In order to calculate I
K
, the measured value displayed
for Z
L-PE
is corrected by an amount corresponding to
all possible deviations (these are defined in detail by
VDE 0100, part 600, as Z
s(m)
2/3 x U
0
/Ia).
I
K
: 3/4 Z Z
s(m)
3/4 x U
0
/Ia
I
K
Short-circuit current calculated by the instrument (at nominal
voltage)
Z Fault loop impedance
Ia Tripping current
(see data sheets for circuit breakers / fuses)
%
Test instrument intrinsic error
Special Case I
k
> I
kmax
see page 29.
9 Measuring Line Impedance (Z
L-N
function)
Measuring Method (internal line resistance measurement)
Supply impedance Z
L-N
is measured by means of the same
method used for loop impedance Z
L-PE
(see section 8 on page
26). However, the current loop is completed via neutral conductor
N rather than protective conductor PE as is the case with loop
impedance measurement.
Select Measuring Function
Connection:
Schuko / 3-Pole Adapter
Connection:
2-Pole Adapter
Set Parameters
Press the softkey shown at the left in order to switch
back and forth between the country-specific plug
insert, e.g. SCHUKO / 3-pole adapter, and 2-pole
adapter. The selected connection type is displayed
inversely (white on black).
Limit value:
I
K
< limit value
U
L
R
L
Z
L-N
Nominal current:
Diameter: 1.5 to 70 sq. mm
Cable types: NY..., H03... - H07...
Number of wires: 2 ... 10-strand
2 ... 160 A, 9999 A
Tripping characteristics:
A, B/L, C/G, D, E, H, K, GL/GG & Factor
GMC-I Messtechnik GmbH 29
Settings for Short-circuit current Calculation – Parameter I
K
Short-circuit current I
K
is used to test shutdown by means of an
overcurrent protective device. In order for an overcurrent protec-
tive device to be tripped on time, short-circuit current I
K
must be
greater than tripping current Ia (see table 6 in section 21.1). The
variants which can be selected with the “Limits” key have the fol-
lowing meanings:
I
K
: Ia The measured value displayed for I
K
is used without
any correction to calculate Z
L-PE
.
I
K
: Ia+% The measured value displayed for Z
L-PE
is corrected
by an amount equal to the test instrument’s measuring
uncertainty in order to calculate I
K
.
I
K
: 2/3 Z In order to calculate I
K
, the measured value displayed
for Z
L-PE
is corrected by an amount corresponding to
all possible deviations (these are defined in detail by
VDE 0100, part 600, as Z
s(m)
2/3 x U
0
/Ia).
I
K
: 3/4 Z Z
s(m)
3/4 x U
0
/Ia
I
K
Short-circuit current calculated by the instrument (at nominal
voltage)
Z Fault loop impedance
Ia Tripping current (see data sheet for circuit breakers / fuses)
%
Test instrument inherent error
Special case I
k
> I
kmax
If the value for the short-
circuit current is beyond
the measured values
defined in
PROFITEST MASTER, it is
indicated by > IK-max“.
In this case, it will be
necessary to evaluate
the measuring result
manually.
Start Measurement
Display of U
L-N
(U
N
/ f
N
)
If the measured voltage value lies within a range of 10% of the
respective nominal line voltage of 120 V, 230 V or 400 V, the
respectively corresponding nominal line voltage is displayed. In
the case of measured values outside of the 10% tolerance, the
actual measured value is displayed.
Displaying the Fuse Table
After measurement has been performed, allowable fuse types can
be displayed by pressing the HELP key.
The table shows maximum allowable nominal current dependent
upon fuse type and breaking requirements.
Key: Ia = breaking current, I
K
= short-circuit current,
I
N
= nominal current, t
A
= tripping time
Semiautomatic measurement
See also section 5.8 regarding the
AUTO parameter. L-PE relationships are
not possible here. The neutral L-N rela-
tionship is not offered during automatic
sequencing to the right of the auto en-
try!
Polarity selection
Limit value:
I
K
< limit value
U
L
R
L
I
K
30 GMC-I Messtechnik GmbH
10 Earthing Resistance Measurement (R
E
function)
Earthing resistance R
E
is important for automatic shutdown in
system segments. It must have a low value in order to assure that
high short-circuit current flows and the system is shut down reli-
ably by the RCCB in the event of a fault.
Test Setup
Earthing resistance (R
E
) is the sum of the earth electrode’s dissi-
pation resistance and earth conductor resistance. Earthing resis-
tance is measured by applying an alternating current via the earth
conductor, the earth electrode and earth electrode resistance.
This current, as well as voltage between the earth electrode and a
probe, are measured.
The probe is connected to the probe connector socket (17) with a
4 mm contact protected plug.
Direct Measurement with Probe (mains powered measurement)
Direct measurement of earthing resistance R
E
is only possible
within a measuring circuit which includes a probe. However, this
means that the probe and reference earth must be of like poten-
tial, i.e. that they are positioned outside of the potential gradient
area. The distance between the earth electrode and the probe
should be at least 20 m.
Measurement without Probe (mains powered measurement)
In many cases, especially in extremely built-up areas, it is difficult,
or even impossible, to set a measuring probe. In such cases,
earthing resistance can be measured without a probe. In this
case, however, the resistance values for the operational earth
electrode R
B
and phase conductor L are also included in the
measurement results.
Measuring Method (w. probe) (mains powered measurement)
The instrument measures earthing resistance R
E
by means of the
ammeter-voltmeter test.
Resistance R
E
is calculated from the quotient of voltage U
E
and
current I
E
where U
E
is between the earth electrode and the probe.
The test current which is applied to earthing resistance is con-
trolled by the instrument (see section 19, “Characteristic Values”,
beginning on page 82 for pertinent values).
A voltage drop is generated which is proportional to earthing
resistance.
Note
Measurement cable and measuring adapter resistance
are compensated for automatically during measurement
and have no effect on measurement results.
If dangerous contact voltages occur during measurement
(> 50 V), the measurement is interrupted and safety shut-
down occurs.
Probe resistance does not effect measurement results
and may be as high as 50 k.
Attention!
!
The probe is part of the measuring circuit and may carry
a current of up to 3.5 mA in accordance with VDE 0413.
Measurement with or without earth electrode voltage depending
upon entered parameters and the selected type of connection:
* This parameter results in automatic selection of probe connection.
Measuring Method with Suppression of RCD Tripping
(mains powered earthing measurement)
The test instrument
generates a direct
current to this end,
which saturates the
RCCB’s magnetic
circuit.
The test instrument
then superimposes
a measuring current
which only demon-
strates half-waves
of like polarity. The
RCCB is no longer
capable of detect-
ing this measuring
current, and is con-
sequently not tripped during measurement.
A four conductor measuring cable is used between the instru-
ment and the test plug. Cable and measuring adapter resistance
is automatically compensated for during measurement and does
not effect measurement results.
Limit Values
Earthing resistance (earth coupling resistance) is determined pri-
marily by the electrode’s contact surface and the conductivity of
the surrounding earth.
The specified limit value depends on the type of electrical system
and its shutdown conditions in consideration of maximum contact
voltage.
Evaluation of Measured Values
The maximum allowable displayed resistance values which assure
that the required earthing resistance is not exceeded, and for
which maximum device operating error has already been taken
into consideration (at nominal conditions of use), can be deter-
mined with the help of Table 2 on page 88. Intermediate values
can be interpolated.
RANGE Connection Measuring Functions
xx / xx k
No probe measurement
No U
E
measurement
10 / U
E
*
Probe measurement activated
U
E
is measured
xx / xx k *
Probe measurement activated
No U
E
measurement
Clamp measurement activated
No U
E
measurement
Start
t1
t3
Measurement
t2
RCD Disabled!
t
I
F
/mA
Suppression of RCCB tripping for RCCBs which
are sensitive to pulsating current
Operation
GMC-I Messtechnik GmbH 31
10.1 Earthing Resistance Measurement – Mains Operated
The following types of measurement or connection are possible:
• 2-pole measurement via 2-pole adapter
• 2-pole measurement via earthing contact plug
(not possible in IT systems)
• 3-pole measurement via 2-pole adapter and
probe
• Selective measurement: 2-pole measurement
with probe and current clamp sensor
At left in figure:
2-pole measuring
adapter for con-
tacting PE and L
measuring points
At right in figure:
The PRO-Schuko
measuring
adapter can be
used as an alter-
native.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
mains~ in white against a black background.
Battery powered measurement is not possible:
The error message shown at the left appears
if the selected connection type is inappropri-
ate for the operating mode.
Special Case: Manual Measuring Range Selection (test current
selection)
(R AUTO, R = 10 k (4 mA), 1 k (40 mA), 100 (0.4 A),
10 (3.7 ... 7 A), 10 /U
E
)
Note
When the measuring range is selected manually, accuracy val-
ues are only valid starting at 5% of the upper limit range value
(except for the
10
range; separate display for small values).
Set Parameters
q Measuring range: AUTO, 10 k (4 mA), 1 k (40 mA), 100
(0.4 A), 10 (> 3.7 A)
In systems with RCCBs, resistance or test current must be se-
lected such that it is less than tripping current (½ I
N
).
q Contact voltage: UL < 25 V, < 50 V, < 65 V, see section 5.7 re-
garding freely selectable voltage.
q Transformer ratio: depends on utilized current clamp sensor
q Connection type: 2-pole adapter, 2-pole adapter + probe,
2-pole adapter + clamp meter
q Type of system: TN or TT
q Test current waveform
See section 10.4 through section 10.6 regarding advisable parame-
ters for the respective measurement and connection types.
Perform Measurements
See section 10.4 through section 10.6.
10.2 Earthing Resistance Measurement – Battery Powered
(only MPRO & MXTRA)
The 5 following types of measurement or connection are possible:
• 3-Pole measurement via PRO-RE adapter
• 4-Pole measurement via PRO-RE adapter
• Selective measurement with clamp meter
(4-pole) via PRO-RE adapter
• 2-clamp measurement via PRO-RE/2 adapter
• Measurement of soil resistivity
E
via PRO-RE adapter
Figure at right:
PRO-RE adapter for connect-
ing earth electrode, auxiliary
earth electrode, probe and
auxiliary probe to the test
instrument for
3/4-pole measurement,
selective measurement and
measurement of soil resistivity
Figure at right:
PRO-RE/2 measuring adapter as
accessory for connecting the E-
Clip 2 generator clamp for 2-clamp
measurement and earth loop resis-
tance measurement.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Mains powered measurement is not possible:
The error message shown at the left appears
if the selected connection type is inappropri-
ate for the operating mode.
Set Parameters
q Measuring range: AUTO, 50 k, 20 k, 2 k, 200 , 20
q Current clamp sensor transformer ratio:
1:1 (1 V/A,) 1:10 (100 mV/A), 1:100 (10 mV/A), 1:1000 (1 mV/A)
q Connection type: 3-pole, 4-pole, selective, 2-clamp,
E
(Rho)
q Distance d (for measuring
E
): xx m
See section 10.7 through section 10.11 regarding advisable
parameters for the respective measurement and connection
types.
Perform Measurements
See section 10.7 through section 10.11.
R
E
R
E
32 GMC-I Messtechnik GmbH
10.3
Earthing Resistance, Mains Powered – 2-Pole Measurement with 2-Pole Adapter or Country-Specific Plug (Schuko) without Probe
Key
R
B
Operational earth
R
E
Earthing resistance
R
i
Internal resistance
R
X
Earthing resistance through equipotential bonding
systems
R
S
Probe resistance
PAS Equipotential bonding busbar
RE Overall earthing resistance (R
E1
//R
E2
//water pipe)
In the event that it is impossible to set a probe, earthing resis-
tance can be estimated by means of an “earth loop resistance
measurement” without probe.
The measurement is performed exactly as described in section 10.4,
“Earthing Resistance Measurement, Mains Powered – 3-Pole Mea-
surement: 2-Pole Adapter with Probe”, beginning on page 33. How-
ever, no probe is connected to the probe connector socket (17).
The resistance value R
ELoop
obtained with this measuring method
also includes operational earth electrode resistance R
B
and resis-
tance at phase conductor L. These values must be deducted from
the measured value in order to determine earthing resistance.
If conductors of equal cross section are assumed (phase conductor L
and neutral conductor N), phase conductor resistance is half as great
as supply impedance Z
L-N
(phase conductor + neutral conductor).
Supply impedance can be measured as described in section 9
beginning of page 28. In accordance with DIN VDE 0100, operational
earth electrode R
B
must lie within a range of “0
to 2
”.
1) Measurement: Z
LN
amounts to R
i
= 2 · R
L
2) Measurement: Z
L-PE
amounts to R
ELoop
3) Calculation:
R
E1
amounts to Z
L-PE
– 1/2 · Z
L-N
; where R
B
= 0
The value for operational earth conductor resistance R
B
should be
ignored in the calculation of earthing resistance, because it is
generally unknown.
The calculated earthing resistance thus includes operational earth
conductor resistance as a safety factor.
In parameter setting steps 1 to 3 are performed auto-
matically by the test instrument.
Select Measuring Function
Select Operating Mode
Set Parameters
q Measuring range: AUTO, 10 k (4 mA), 1 k (40 mA), 100
(0.4 A), 10 (3.7 ... 7 A). In systems with RCCBs, resistance
or test current must be selected such that it is less than trip-
ping current (½ I
N
).
q Connection type: 2-pole adapter
q Contact voltage: UL < 25 V, < 50 V, < 65 V
q Test current waveshape: Sinusoidal (full-wave), 15 mA sinusoidal
(full-wave), DC offset and positive half-wave
q System type: TN/TT, IT
q Transformer ratio: irrelevant in this case
Start Measurement
P
R
O
F
I
T
E
S
T
Ri
W
a
t
e
r
P
i
p
e
E
2
E
1
B
R
E
Limit value:
R
E
> Limit Value
U
L
R
L
GMC-I Messtechnik GmbH 33
10.4 Earthing Resistance Measurement, Mains Powered – 3-Pole Measurement: 2-Pole Adapter with Probe
Key
R
B
Operational earth electrode
R
E
Earthing resistance
R
X
Earthing resistance through equipotential bonding sys-
tems
R
S
Probe resistance
PAS Equipotential bonding busbar
RE Overall earthing resistance (R
E1
//R
E2
//water pipe)
Measurement of R
E
Select Measuring Function
Select Operating Mode
Connection
2-pole adapter and probe are connected
Set Parameters
q Measuring range: AUTO,
10 k (4 mA), 1 k (40 mA), 100 (0.4 A), 10 (3.7 ... 7 A)
In systems with RCCBs, resistance or test current must be se-
lected such that it is less than tripping current (½ I
N
).
q Connection type: 2-pole adapter + probe
q Contact voltage: UL < 25 V, < 50 V, < 65 V, see section 5.7 re-
garding freely selectable voltage.
q Test current waveshape:
Sinusoidal (full-wave), 15 mA sinusoidal (full-wave),
DC offset and positive half-wave
q System type: TN/TT, IT
q Transformer ratio: irrelevant in this case
Start Measurement
Note
The following diagram appears if the
2-pole adapter is connected incor-
rectly.
P
R
O
F
I
T
E
S
T
W
a
t
e
r
P
i
p
e
SE
2
E
1
B
R
E1
U
Probe
I
--------------=


R
E
Limit value:
R
E
> Limit Value
U
L
R
L
34 GMC-I Messtechnik GmbH
10.5 Earthing Resistance Measurement, Mains Powered – Measurement of Earth Electrode Voltage (U
E
function)
This measurement is only possible with a probe (see section
10.4). Earth electrode potential U
E
is the voltage which occurs at
the earth electrode between the earth electrode terminal and ref-
erence earth if a short-circuit occurs between the phase conduc-
tor and the earth electrode. Measurement of earth electrode
potential is required by Swiss standard NIV/NIN SEV 1000.
Measuring Method
In order to determine earth electrode potential, the instrument first
measures earth electrode loop resistance R
ELoop
, and immedi-
ately thereafter earthing resistance R
E
. The instrument stores both
values and then calculates earth electrode potential with the fol-
lowing equation:
The calculated value is displayed at the display panel.
Select Measuring Function
Select Operating Mode Select measuring range
Connection
2-pole adapter and probe are connected.
Set Parameters
q Measuring range: 10 / U
E
q Connection type: 2-pole adapter + probe
q Contact voltage: UL < 25 V, < 50 V, < 65 V, see section 5.7 re-
garding freely selectable voltage.
q Test current waveshape: sinusoidal only in this case (full-wave)!
q System type: TN/TT, IT
q Transformer ratio: irrelevant in this case
Start Measurement
Note
The following diagram appears if the
2-pole adapter is connected incor-
rectly.
P
R
O
F
I
T
E
S
T
Ri
W
a
t
e
r
P
i
p
e
SE
2
E
1
B
U
E
U
N
R
E
R
E
Loop
-------------------=
R
E
Limit value:
R
E
> Limit Value
U
L
R
L
GMC-I Messtechnik GmbH 35
10.6 Earthing Resistance Measurement, Mains Powered – Selective Earthing Resistance Measurement with Current Clamp Sensor
as Accessory
As an alternative to the conventional measuring method, measurement can also be performed with a current clamp sensor.
Key
R
B
Operational earth
R
E
Earthing resistance
R
L
Cable resistance
R
X
Earthing resistance through equipotential bonding
systems
R
S
Probe resistance
PAS Equipotential bonding busbar
RE Overall earthing resistance (R
E1
// R
E2
// water pipe)
Measurement without clamp: R
E
= R
E1
// R
E2
Measurement with clamp: R
E
= R
E2
=
Select Measuring Function
Select Operating Mode
Connection
2-pole adapter, clamp and probe are connected.
Set Parameters at Tester
q Measuring range (test current selection):
1 k (40 mA), 100 (0.4 A), 10 (3.7 ... 7 A)
In the case of systems with RCCBs, the DC + functions
can be selected (only in the 10 range and only with the
METRAFLEX P300).
q Connection type: 2-pole adapter + clamp
After parameter selection: automatic setting to 10 measuring
range and 1 V/A or 1000 mV/A transformer ratio
q Contact voltage: UL < 25 V, < 50 V, < 65 V, see section 5.7 re-
garding freely selectable voltage.
q Test current waveshape:
Sinusoidal (full-wave), DC offset and positive half-wave
q System type: TN/TT, IT
q Current clamp sensor transformation ratio: see table below
Set Parameters at Current Clamp Sensor
q Current clamp sensor measuring range: see table below
Selecting a Measuring Range at the Current Clamp Sensor
Important Instructions for Use of the Current Clamp Sensor
• Use only the METRAFLEX P300 or the Z3512A current clamp
sensor for this measurement.
• Read and adhere to the operating instructions for the
METRAFLEX P300 current clamp sensor, as well as the safety
precautions included therein.
•Observe direction of current flow (see arrow on the current
clamp sensor).
•Use the clamp in the permanently connected state. The sensor
may not be moved during measurement.
• The current clamp sensor may only be used at an adequate
distance from powerful extraneous fields.
• Before use, always inspect the electronics housing, the con-
nector cable and the current sensor for damage.
P
R
O
F
I
T
E
S
T
W
a
t
e
r
P
i
p
e
SE
2
E
1
B
U
Probe
I
Clamp
--------------


R
E
Tester METRAFLEX P300 Clamp Tester
Transforma-
tion Ratio
Parameter
Switch Measuring
Range
Measuring
Range
1:1
1 V / A
3 A (1 V/A) 3 A
0.5 ... 100
mA
1:10
100 mV / A
30 A (100 mV/A) 30 A 5 ... 999 mA
1:100
10 mV / A
300 A (10 mV/A) 300 A 0.05 ... 10 A
36 GMC-I Messtechnik GmbH
• In order to prevent electric shock, keep the surface of the
METRAFLEX clean and free of contamination.
• Before use, make sure that the flexible current sensor, the
connector cable and the electronics housing are dry.
Start Measurement
In the event that you have changed the transformation ratio at the
test instrument, a pop-up window appears indicating that this
new setting also has to be entered to the connected current
clamp sensor.
i: Note regarding cur-
rently selected transfor-
mation ratio at the tester
RE
Clamp
: Selective earthing resistance measured via clamp
RE
Probe
: Total earthing resistance measured via probe, compara-
tive value
Note
The following diagram appears if the
2-pole adapter is connected incor-
rectly.
GMC-I Messtechnik GmbH 37
10.7 Earthing Resistance Measurement, Battery Operated – 3-Pole (only MPRO & MXTRA)
3-Wire Method
Measurement of Earthing Resistance with 3-Wire Method
Connection
➭ Position the spikes for the probe and the auxiliary electrode at
least 20, respectively 40 meters from the electrode (see figure
above).
➭ Make sure that no excessively high contact resistances occur
between the probe and the ground.
➭ Attach the PRO-RE adapter (Z501S) to the test plug.
➭ Connect the probe, the auxiliary electrode and the electrode
via the 4 mm banana plug sockets at the PRO-RE adapter.
In doing so, observe labeling on the banana plug sockets.
Terminal ES/P1 is not connected.
The resistance of the measurement cable to the earth electrode is
incorporated directly into the measurement results.
In order to keep error caused by measurement cable resistance
as small as possible, a short connector cable with large cross-
section should be used between the earth electrode and terminal
“E” for this measuring method.
Note
The measurement cables must be well insulated in order
to prevent shunting. In order to keep the influence of pos-
sible coupling to a minimum, the measurement cables
should not cross each other or run parallel to each other
over any considerable distance.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Set Parameters
q Measuring range: AUTO, 50 k, 20 k, 2 k, 200 , 20
q Connection type: 3-pole
q Transformer ratio: irrelevant in this case
q Distance d (for measuring
E
): irrelevant in this case
Start Measurement
PROFITEST MPRO, PROFITEST MXTRA
E
SH
20 m 20 m
SHESE
R
E
38 GMC-I Messtechnik GmbH
10.8 Earthing Resistance Measurement, Battery Operated – 4-Pole (only MPRO & MXTRA)
4-Wire Method
The 4-wire method is used in the case of high cable resistance
between the earth electrode and the instrument terminal.
The resistance of the cable between the earth electrode and the
“E” terminal at the instrument is measured in this case.
Figure 10.8.1:Measurement of Earthing Resistance with 4-Wire Method
Connection
➭ Position the spikes for the probe and the auxiliary electrode at
least 20, respectively 40 meters from the electrode (see figure
above).
➭ Make sure that no excessively high contact resistances occur
between the probe and the ground.
➭ Attach the PRO-RE adapter (Z501S) to the test plug.
➭ Connect the probes, the auxiliary electrode and the electrode
via the 4 mm banana plug sockets at the PRO-RE adapter.
In doing so, observe labeling on the banana plug sockets.
Note
In the case of the 4-wire method, the earth electrode is
connected to the “E” and “ES” terminals with two sepa-
rate measurement cables, the probe is connected to the
“S” terminal and the auxiliary earth electrode is connected
to the “H” terminal.
Note
The measurement cables must be well insulated in order
to prevent shunting. In order to keep the influence of pos-
sible coupling to a minimum, the measurement cables
should not cross each other or run parallel to each other
over any considerable distance.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Set Parameters
q Measuring range: AUTO, 50 k, 20 k, 2 k, 200 , 20
q Connection type: 4-pole
q Transformer ratio: irrelevant in this case
q Distance d (for measuring
E
): irrelevant in this case
Start Measurement
Potential Gradient Area
Information regarding suitable positioning of the probe and the
auxiliary earth electrode can be obtained by observing voltage
characteristics or dissipation resistance in the ground.
The measuring current from the earth tester which flows via the
earth electrode and the auxiliary earth electrode causes a given
potential distribution in the form of a potential gradient area (see
also Figure 10.8.3: on page 39). Resistance distribution is analo-
gous to potential distribution.
Dissipation resistance of the earth electrode and the auxiliary
earth electrode differs as a rule. The potential gradient area and
the resistance gradient area are thus not symmetrical.
Dissipation Resistance of Small Scope Earth Electrodes
The arrangement of the probe and the auxiliary earth electrode is
very important for correct determination of the dissipation resis-
tance of earth electrodes.
The probe must be positioned between the earth electrode and
the auxiliary earth electrode within the so-called neutral zone (ref-
erence earth) (see also Figure 10.8.2: on page 39).
The voltage or resistance curve is thus nearly horizontal within the
neutral zone.
Proceed as follows in order to select suitable probe and auxiliary
earth electrode resistances:
➭ Drive the auxiliary earth electrode into the ground at a dis-
tance of roughly 40 meters from the earth electrode.
PROFITEST MPRO, PROFITEST MXTRA
SHESE
E
SH
20 m 20 m
R
E
GMC-I Messtechnik GmbH 39
➭ Position the probe halfway between the earth electrode and
the auxiliary earth electrode and determine earthing resis-
tance.
➭ Reposition the probe 2 to 3 meters closer to the earth elec-
trode, and then 2 to 3 meters closer to the auxiliary earth elec-
trode and measure earthing resistance in each position.
If all 3 measurements result in the same measured value, this is
the correct earthing resistance. The probe is in the neutral zone.
However, if the three measured values for earthing resistance dif-
fer from each other, either the probe is not located in the neutral
zone, or the voltage or resistance curve is not horizontal at the
point at which the probe has been inserted.
Figure 10.8.2: Voltage Curve in Homogenous Earth between Earth
Electrode E and Auxiliary Earth Electrode H
Correct measurements can be obtained in such cases by either
increasing distance between the earth electrode and the auxiliary
earth electrode, or by moving the probe to the perpendicular
bisector between the earth electrode and the auxiliary earth elec-
trode (see also Figure 10.8.3:). When the probe is moved to the
perpendicular bisector, its location is removed from the sphere of
influence of the two potential gradient areas caused by the earth
electrode and the auxiliary earth electrode.
Figure 10.8.3: Probe Distance S Outside of the Overlapping Potential
Gradient Areas on the Perpendicular Bisector of Earth
Electrode E and Auxiliary Earth Electrode H
Dissipation Resistance of Large Scope Earthing Systems
Significantly large distances to the probe and the auxiliary earth
electrode are required for measuring large scope earthing sys-
tems. Calculations are based on 2½ or 5 times the value of the
earthing system’s largest diagonal.
Large scope earthing systems of this sort often demonstrate dis-
sipation resistances of only a few ohms, which makes it especially
important to position the measuring probe within the neutral zone.
The probe and the auxiliary earth electrode should be positioned
at a right angle to the direction of the earthing system’s largest lin-
ear expansion. Dissipation resistance must be kept small. If nec-
essary, several earth spikes must be used at a distance of 1 to
2 m from each other and connected to this end.
However, in actual practice large measuring distances are fre-
quently not possible to due difficult terrain. If this is the case, pro-
ceed as shown in Figure 10.8.4:.
➭ Auxiliary earth electrode H is positioned as far from possible
from the earthing system.
➭ The area between the earth electrode and the auxiliary earth
electrode is sampled in equal steps of 5 meters each.
➭ Measured resistance values are displayed as a table, and then
plotted graphically as depicted in Figure 10.8.4: (curve I).
If a line parallel to the abscissa is drawn through inflection point
S1, this line divides the resistance curve into two parts.
Measured at the ordinate, the bottom part results in sought dissi-
pation resistance of the earth electrode R
A/E
, and the top value
equals dissipation resistance of the auxiliary earth electrode R
A/H
.
With a measurement setup of this type, dissipation resistance of
the auxiliary earth electrode should be less than 100 times the
dissipation resistance of the earth electrode.
In the case of resistance curves without a well defined horizontal
area, measurement should be double checked after repositioning
the auxiliary earth electrode. This additional resistance curve must
be entered to the first diagram with a modified abscissa scale
such that the two auxiliary earth electrode locations are superim-
posed. The initially ascertained dissipation resistance value can
be checked with inflection point S2 (see Figure 10.8.4:).
Notes Regarding Measurement in Difficult Terrain
In extremely unfavorable terrain (e.g. sandy soil after a lengthy
period without rain), auxiliary earth electrode and probe resistance
can be reduced to permissible values by watering the ground
around the auxiliary earth electrode and the probe with soda
water or salt water. If this does not suffice, several earth spikes
can be parallel connected to the auxiliary earth electrode.
In mountainous terrain or in the case of very rocky subsoil where
earth spikes cannot be driven into the ground, wire grates with a
mesh size of 1 cm and a surface area of about 2 square meters
can be used. These grates are laid flat onto the ground, are wet-
ted with soda water or salt water and may also be weighted down
with sacks full of moist earth.
Figure 10.8.4: Earthing Resistance Measurement for a Large Scope
Earthing System
d = distance, electrode to aux. electrode
E = earth electrode
H = auxiliary earth electrode
I = measuring current
K = neutral zone (reference earth)
U
E
= earth potential
R
E
= U
E
/ I = earthing resistance
= potential
I
I
d
E
H
U
E
K
E = electrode location
H = aux. electrode loc.
S = probe location
S
HE
Curve I (KI) Curve II (KII)
mWmW
5
10
15
20
25
30
40
60
80
100
0.9
1.28
1.62
1.82
1.99
2.12
2.36
2.84
3.68
200
10
20
40
60
80
100
120
140
160
200
0.8
0.98
1.60
1.82
2.00
2.05
2.13
2.44
2.80
100
S1, S2 = inflection points
KI = curve I
KII = curve II
S1, S2 = inflection points
KI = curve I
KII = curve II
S
1
S
2
K I
K II
4
3
2
1
0
10 20 30 40 50 60 70 80 90 100 m KI
20 40 60 80 100 120 140 160 180 200 m KII
5
R
A/H
R
A/E
0
0
S HESE
40 GMC-I Messtechnik GmbH
10.9 Earthing Resistance Measurement, Battery Operated – Selective (4-pole)
with Current Clamp Sensor and PRO-RE Measuring Adapter as Accessory (only MPRO & MXTRA)
General
When measuring earthing resistance in systems with several par-
allel connected earth electrodes, total resistance of the earthing
system is measured.
Two earth spikes (auxiliary earth electrode and probe) are set for
this measurement. Measuring current is fed between the earth
electrode and the auxiliary earth electrode and voltage drop is
measured between the earth electrode and the probe.
The current clamp is positioned around the earth electrode to be
measured, and thus only that portion of the measuring current
which flows through the earth electrode is measured.
Connection
➭ Position the spikes for the probe and the auxiliary electrode at
least 20, respectively 40 meters from the electrode (see figure
above).
➭ Make sure that no excessively high contact resistances occur
between the probe and the ground.
➭ Attach the PRO-RE adapter (Z501S) to the test plug.
➭ Connect the probes, the auxiliary electrode and the electrode
via the 4 mm banana plug sockets at the PRO-RE adapter.
In doing so, observe labeling on the banana plug sockets.
➭ Connect the Z3512A current clamp sensor to jacks 15 and 16 at
the test instrument.
➭ Attach the current clamp sensor to the earth electrode.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Set Parameters at Tester
q Measuring range: 200
Note
After switching to selective measurement, the AUTO
measuring range is activated automatically if a measuring
range of greater than 200 had been selected.
q Connection type: selective
q Current clamp sensor transformer ratio:
1:1 (1 V/A,) 1:10 (100 mV/A), 1:100 (10 mV/A)
q Distance d (for measuring
E
): irrelevant in this case
Set Parameters at Current Clamp Sensor
q Current clamp sensor measuring range: see table below
Selecting a Measuring Range at the Current Clamp Sensor
Important Instructions for Use of the Current Clamp Sensor
• Use only the Z3512A current clamp sensor for this measure-
ment.
•Use the clamp in the permanently connected state. The sensor
may not be moved during measurement.
• The current clamp sensor may only be used at an adequate
distance from powerful extraneous fields.
• Make sure that the current clamp sensor’s connector cable is
laid separate from the probe cables to the greatest possible
extent.
Start Measurement
PROFITEST MPRO, PROFITEST MXTRA
R
E
Tester Z3512A Clamp
Transforma-
tion Ratio
Parameter
Switch Measuring
Range
1:1
1 V / A
1 A / x 1 1 A
1:10
100 mV / A
10 A / x 10 10 A
1:100
10 mV / A
100 A / x 100 100 A
GMC-I Messtechnik GmbH 41
10.10 Earthing Resistance Measurement, Battery Powered – Ground Loop Measurement
(with current clamp sensor and transformer, plus PRO-RE/2 measuring adapter as accessory) (only MPRO & MXTRA)
2-Clamp Measuring Method
In the case of earthing sys-
tems which consist of sev-
eral earth electrodes (R1 ...
Rx) which are connected to
each other, earthing resis-
tance of a single electrode
(Rx) can be ascertained with
the help of 2 current clamps
without disconnecting Rx or
using spikes.
This measuring method is especially well suited for buildings or
systems for which probes and auxiliary earth electrodes cannot
be used, or where it’s impermissible to disconnect earth elec-
trodes.
Furthermore, this “spike-free” measurement is performed as one
of three measurements for lightning protection systems, in order
to determine whether or not current can be dissipated.
Figure at right:
PRO-RE/2 measuring adapter as
accessory for connecting the E-
Clip 2 generator current clamp
Connection
➭ No probes or auxiliary earth electrodes are required.
➭ The earth electrode is not disconnected.
➭
Attach the
PRO-RE/2 adapter (Z501T)
to the test plug.
➭ Connect the E-Clip 2 generator clamp (current clamp transformer)
via the 4 mm safety plugs at the PRO-RE/2 adapter.
➭ Connect the Z3512A current clamp sensor to jacks 15 and 16 at
the test instrument.
➭ Attach the 2 clamps to an earth electrode (earth spike) at dif-
ferent heights with a clearance of at least 30 cm.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Set Parameters at Tester
q Measuring range: in this case always AUTO
Note
After selecting to 2-clamp measurement, switching to the
AUTO range takes place automatically. It is then no longer
possible to change the range!
q Connection type: 2-clamp
q Current clamp sensor transformer ratio:
1:1 (1 V/A), 1:10 (100 mV/A), 1:100 (10 mV/A)
q Distance d (for measuring
E
): irrelevant in this case
Set Parameters at Current Clamp Sensor
q Current clamp sensor measuring range: see table below
Selecting a Measuring Range at the Current Clamp Sensor
Important Instructions for Use of the Current Clamp Sensor
• Use only the Z3512A current clamp sensor for this measure-
ment.
•Use the clamp in the permanently connected state. The sensor
may not be moved during measurement.
• The current clamp sensor may only be used at an adequate
distance from powerful extraneous fields.
• Make sure that the connector cables from the two clamps are
laid separate from each other to the greatest possible extent.
Start Measurement
PROFITEST MPRO, PROFITEST MXTRA
Tester Z3512A Clamp
Transforma-
tion Ratio
Parameter
Switch Measuring
Range
1:1
1 V / A
1 A / x 1 1 A
1:10
100 mV / A
10 A / x 10 10 A
1:100
10 mV / A
100 A / x 100 100 A
R
E
42 GMC-I Messtechnik GmbH
10.11 Earthing Resistance Measurement, Battery Powered
– Measurement of Soil Resistivity
E
(only MPRO & MXTRA)
General
Measurement of Soil Resistivity
The determination of soil resistivity is necessary for the planning of
earthing systems. Reliable values need to be ascertained which
take even the worst possible conditions into account (see “Geo-
logic Evaluation” on page 43).
Soil resistivity is decisive with regard to the magnitude of an earth
electrode’s dissipation resistance. Soil resistivity can be measured
with the PROFITEST MASTER using the method according to
Wenner.
Four earth spikes of greatest possible length are driven into the
ground in a straight line at distance d from one another, and are
connected to the earth tester (see figure above).
The earth spikes usually have a length of 30 to 50 cm. Longer
earth spikes can be used for soil which demonstrates poor con-
ductivity (sandy soil etc.). The depth to which the earth spikes are
driven into the ground may not exceed one twentieth of distance
d.
Note
Erroneous measurement may result in the event that pip-
ing, cables or other underground metal conduits run par-
allel to the measuring setup.
Soil resistivity is calculated as follows:
E
=2 d R
Where:
= 3.1416
d = distance in m between two earth spikes
R = ascertained resistance value in (this value corresponds to R
E
as
determined with the 4-wire method)
Connection
➭ Position the spikes for the probe and the auxiliary electrode at
equal distances (see figure above).
➭ Make sure that no excessively high contact resistances occur
between the probe and the ground.
➭ Attach the PRO-RE adapter (Z501S) to the test plug.
➭ Connect the probes, the auxiliary electrode and the electrode
via the 4 mm banana plug sockets at the PRO-RE adapter.
In doing so, observe labeling on the banana plug sockets.
Select Measuring Function
Select Operating Mode
The selected operating mode is displayed inversely:
white battery icon against black background.
Set Parameters
q Measuring range: AUTO, 50 k, 20 k, 2 k, 200 , 20
q Connection type:
E
(Rho)
q Transformer ratio: irrelevant in this case
q Distance d for measurement of
E
: adjustable from 0.1 to 999 m
Start Measurement
ES ESH
dd d
R
E
GMC-I Messtechnik GmbH 43
Geologic Evaluation
Except in extreme cases, the ground is measured down to a
depth which is roughly equal to probe distance d.
This makes it possible to arrive at conclusions regarding the
ground’s stratification by varying probe distance. Layers which
are highly conductive (water table), into which earth electrodes
should be installed, can thus be discovered within a region which
is otherwise poorly conducting.
Soil resistivity is subject to considerable fluctuation which may be
due to various causes such as porosity, moisture penetration,
concentration of dissolved salts in the ground water and climatic
fluctuation.
Characteristic values for
E
relative to season (soil temperature
and the soil’s negative temperature coefficient) can be approxi-
mated quite closely by means of a sinusoidal curve.
Soil Resistivity E Relative to Season Without the Effects of Precipitation
(earth electrode depth < 1.5 m)
A number of typical soil resistivity values for various types of
ground are summarized in the following table.
Soil Resistivity
E
with Different Types of Soil
Calculating Dissipation Resistance
Formulas for calculating dissipation resistance for common types
of earth electrodes are included in this table.
These rules of thumb are entirely adequate for actual practice.
Formulas for Calculating Dissipation Resistance R
A
for Various Earth
Electrodes
R
A
= dissipation resistance ()
E
= soil resistivity (m)
I = length of the earth electrode (m)
D = diameter of a ring earth electrode, diameter of the equivalent surface
area of a mesh earth electrode or diameter of a hemispherical earth
electrode (m)
F = surface area (sq. meters) of the enclosed surface or a ring or mesh
earth electrode
a = Edge length (m) of a square ground plate; a is replaced with the fol-
lowing for rectangular plates:
bxc, where b and c are the two
sides of the rectangle.
J = volume (cubic meters) of an individual foundation footing
Type of Soil Soil Resistivity
E
[m]
Marshy ground 8 60
Arable soil, loamy and clayey
soil, moist gravel
20 300
Moist sandy soil 200 600
Dry sandy soil, dry gravel 200 2000
Rocky ground 300 8000
Rock 10
4
10
10
+
E
(%)
10
20
30
-10
-20
-30
Jan. MarchMay July Sept. Nov.
Number Earth Electrode Rule of Thumb Subsidiary Variable
1
Earth strip (star type earth
electrode)
—
2
Earth rod (buried earth
electrode)
—
3 Ring earth electrode
4 Mesh earth electrode
5 Ground plate —
6
Hemispherical earth elec-
trode
R
A
2
E
I
----------=
R
A
E
I
----=
R
A
2
E
3D
----------=
D 1,13 F
2
=
R
A
2
E
2D
----------=
D 1,13 F
2
=
R
A
2
E
4,5 a
----------=
R
A
E
D
--------=
D 1,57 J
3
=
44 GMC-I Messtechnik GmbH
11 Measuring Insulation Resistance
Attention!
!
Testing Systems with RCDs
Insulation tests in electrical systems with type B RCDs may
only be conducted while the RCDs are switched off.
In the case of insulation testing, it’s advisable to discon-
nect AC/DC sensitive RCDs for safety reasons, because the
electronics required for detecting DC residual current
may be destroyed by these tests.
(Excerpt from ABB brochure 2CDC001003C0109).
11.1 General
Select Measuring Function
Connection
2 pole adapter or test
plug
Note
If you use the test plug together with a plug insert, insula-
tion resistance is only measured between the phase con-
ductor terminal designated “L” and protective conductor
terminal PE!
Note
Checking Measurement Cables Before Measurements
Before performing insulation measurement, the test
probes on the measurement cables should be short-cir-
cuited in order to assure that the instrument displays a
value of less than 1 k. In this way, incorrect connection
can be avoided and broken measurement cables can be
detected.
Set Parameters
* Freely adjustable voltage (see section 5.7)
Polarity Selection
* AUTO parameter (see section 5.8)
Breakdown current for Ramp Function
Limit values for Breakdown Voltage
Limit Values for Constant Test Voltage
q Test voltage
A test voltage which deviates from nominal voltage, and is usually
lower, can be selected for measurements at sensitive compo-
nents, as well as systems with voltage limiting devices.
q Voltage Type
The “U
ISO
” rising test voltage function (ramp function) is used to
detect weak points in the insulation, as well as to determine
response voltage for voltage limiting components. After briefly
pressing the ON/START key, test voltage is continuously increased
until specified nominal voltage U
N
is reached. U is the voltage
which is measured at the test probes during and after testing. This
voltage drops to a value of less than 10 V after measurement (see
section entitled “Discharging the Device Under Test”).
Insulation measurement with rising test voltage is ended:
• As soon as specified maximum test voltage U
N
is reached and
the measured value is stable
or
• As soon as specified maximum test voltage is reached, e.g.
after sparkover occurs at breakdown voltage).
Specified maximum test voltage U
N
or any occurring triggering or
breakdown voltage is displayed for U
ISO
.
The constant test voltage function offers two options:
R
ISO
Voltage type: constant
Test voltage:
50 V / 100 V / 250 V / 500 V / 1000 V / xxx V*
Voltage type: rising/ramp
Earth leakage resistance:
2-pole meas. (relevant for report generating only):
Measurements between
Lx-PE / N-PE / L+N-PE / Lx-N / Lx-Ly / AUTO*
where x, y = 1, 2, 3
Limit value:
I > I
Limit
U
INS
STOP
low limit:
U
INS
input range:
> 40V ... < 999 V
upper limit:
Limit value:
R
INS
< Limit Value
U
L
R
L
U
INS
GMC-I Messtechnik GmbH 45
• After briefly pressing the ON/START key, specified test voltage
UN is read out and insulation resistance RISO is measured. As
soon as the measured value is stable (settling time may be
several seconds in the case of high cable capacitance values),
measurement is ended and the last measured values for RISO
and UISO are displayed. U is the voltage which is measured at
the test probes during and after testing. This voltage drops to a
value of less than 10 V after measurement (see section enti-
tled “Discharging the Device Under Test”).
or
• As long as you press and hold the ON/START key, test voltage
UN is applied and insulation resistance R
ISO
is measured. Do
not release the key until the measured value has settled in
(settling time may be several seconds in the case of high cable
capacitance values). Voltage U, which is measured during
testing, corresponds to voltage UISO. After releasing the ON/
START key, measurement is ended and the last measured
values for R
ISO
and U
ISO
are displayed. U drops to a value of
less than 10 V after measurement (see section entitled “Dis-
charging the Device Under Test”).
q Pole Selection Report Entry
The poles between which testing takes place can only be entered
here for reporting purposes. The entry itself has no influence on
the actual polarity of the test probes or pole selection.
q Limits – Setting the Limit Value
The limit value for insulation resistance can be set as desired. If
measurement values occur which are below this limit value, the
red U
L
/R
L
LED lights up. A selection of limit values ranging from
0.5 to 10 M is available. The limit value is displayed above the
measured value.
Start Measurement – Rising Test Voltage (ramp function)
Press briefly:
Quick polarity reversal if parameter is set to AUTO: 01/10 ... 10/10: L1-PE
... L1-L3
Note
If “semiautomatic polarity reversal” is selected (see sec-
tion 5.8), the corresponding icon is displayed instead of
the ramp.
General Notes Regarding Insulation Measurements with Ramp
Function
Insulation measurement with ramp function serves the following
purposes:
• Detect weak points in the test object’s insulation
• Determine tripping voltage of voltage limiting components and
test them for correct functioning These components may
include, for example, varistors, overvoltage limiters (e.g.
DEHNguard® from Dehn+Söhne) and spark gaps.
The test instrument uses continuously rising test voltage for this
measuring function, up to the maximum selected voltage limit.
The measuring procedure is started by pressing the START/
STOPP key and runs automatically until one of the following
events occurs:
• The selected voltage limit is reached
• The selected current limit is reached
• Sparkover occurs (spark gaps)
Differentiation is made amongst the following three procedures for
insulation measurement with ramp function:
Testing of overvoltage limiters or varistors
and determining their tripping voltage:
– Select maximum voltage such that the anticipated breakdown
voltage of the device under test is roughly one third of this
value (observe manufacturer’s data sheet if applicable).
– Select current limit value in accordance with actual require-
ments or the manufacturer’s data sheet (characteristic curve
of the device under test).
Determining tripping voltage for spark gaps:
– Select maximum voltage such that the anticipated breakdown
voltage of the device under test is roughly one third of this
value (observe manufacturer’s data sheet if applicable).
– Select the current limit value in accordance with actual
requirements within a range of 5 to 10 A (response charac-
teristics are too unstable with larger current limit values, which
may result in faulty measurement results).
Detecting weak points in the insulation:
– Select maximum voltage such that it does not exceed the test
object’s permissible insulation voltage; it can be assumed that
an insulation fault will occur even with a significantly lower
voltage if an accordingly lower maximum voltage value is
selected (nevertheless at least greater than anticipated break-
down voltage) – the ramp is less steep as a result (increased
measuring accuracy).
– Select the limit current value in accordance with actual
requirements within a range of 5 to 10 A (see also settings
for spark gaps).
Start Measurement – Constant Test Voltage
Long-term measurements
Press and hold:
Quick polarity reversal if parameter is set to AUTO: 01/10 ... 10/10:
L1-PE ... L1-L3
Note
The instrument’s batteries are rapidly depleted during the
insulation resistance measurement. When using the
“constant test voltage” function, only press and hold the
Start t key until the display has become stable (if long-
term measurement is required).
46 GMC-I Messtechnik GmbH
Special Condition for Insulation Resistance Measurement
Attention!
!
Insulation resistance can only be measured at voltage-
free objects.
If measured insulation resistance is less than the selected limit
value, the U
L
/R
L
LED lights up.
If an interference voltage of
25 V is present within the system,
insulation resistance is not measured. The MAINS/NETZ LED
lights up and the “interference voltage” pop-up message appears.
All conductors (L1, L2, L3 and N) must be tested against PE!
Attention!
!
Do not touch the instrument’s terminal contacts during
insulation resistance measurements!
If nothing has been connected to the terminal contacts, or if a
resistive load component has been connected for measurement,
your body would be exposed to a current of approx. 1 mA at a
voltage of 1000 V.
The noticeable shock may lead to injury (e.g. resulting from a star-
tled reaction etc.).
Discharging the Device Under Test
Attention!
!
If measurement is performed at a capacitive object such
as a long cable, it becomes charged with up to approx.
1000 V!
Touching such objects is life endangering!
When an insulation resistance measurement has been performed
on a capacitive object it is automatically discharged by the instru-
ment after measurement has been completed. Contact to the
device under test must be maintained to this end. The falling volt-
age value can be observed at the U display.
Do not disconnect the DUT until less than 10 V is displayed for U!
Evaluation of Measured Values
Instrument measuring error must be taken into consideration in
order to assure that the limit values set forth in DIN VDE regula-
tions are not fallen short of. The required minimum display values
for insulation resistance can be determined with the help of Table
3 on page 88. These values take maximum device error into con-
sideration (under nominal conditions of use). Intermediate values
can be interpolated.
11.2 Special Case: Earth Leakage Resistance (R
EISO
)
This measurement is performed in order to determine electro-
static discharge capacity for floor coverings in accordance with
EN 1081.
Select Measuring Function
Set Parameters
* Freely adjustable voltage (see section 5.7)
Connection and Test Set-
Up
➭ Rub the floor covering at the point at which measurement is to
be performed with a dry cloth.
➭ Place the 1081 floor probe onto the point of measurement
and load it with a weight of at least 300 N (30 kg).
➭ Establish a conductive connection between the measuring
electrode and the Test Probe and connect the measuring
adapter (2-pole) to an earth contact, e.g. the earthing contact
at a mains outlet or a central heating radiator (prerequisite: re-
liable ground connection).
Start Measurement
The limit value for earth leakage resistance from the relevant regu-
lations applies.
R
ISO
Limit value:
RE(ISO) > limit value
U
L
R
L
R
EISO
Voltage type: constant
Test voltage : 50 V / 100 V / 250 V / 325 V / 500 V / 1000 V*
Voltage type: rising/ramp
Earth leakage
resistance:
GMC-I Messtechnik GmbH 47
12 Measuring Low-Value Resistance
up to 200 Ohm
(protective conductor and equipotential bonding
conductor)
According to the regulations, the measurement of low-value resis-
tance at protective conductors, earth conductors or bonding con-
ductors must be performed with (automatic) polarity reversal of
the test voltage, or with current flow in one (+ pole to PE) and then
the other direction (– pole to PE).
Attention!
!
Low-value resistance must only be measured at voltage-
free objects.
Select Measuring Function
Connection
Via 2-pole adapter only!
Set Parameters
q ROFFSET ON/OFF
– Compensation for Extension Cables with up to 10
If measurement cables or extension cables are used, their resis-
tance can be deducted automatically from the measurement
results. Proceed as follows:
➭ Switch R
OFFSET from OFF to ON. “ROFFSET = 0.00 ” appears in
the footer.
➭ Select a polarity option or automatic polarity reversal.
➭ Short-circuit the end of the measurement extension cable with
the second test probe at the instrument.
➭ Start measurement of offset resistance with I
N
.
An intermittent acoustic signal sounds first,
which is then accompanied by a blinking
warning to prevent an offset value which has
already been saved from being unintentionally
deleted.
➭
Start the offset measurement by press-
ing the release key again or abort mea-
surement by pressing the
key
t
ON/
START
(here = ESC).
Note
If the offset measurement is stopped by an error pop-up
(Roffset > 10 or difference between RLO+ and RLO–
greater than 10%), the offset value that has last been
measured is retained. Inadvertent deletion of an offset
value once established is thus almost ruled out! The
respectively smaller value is otherwise stored to memory
as an offset value. The maximum offset value is 10.0 .
Negative resistances may result due to the offset value.
Measuring ROFFSET
The ROFFSET x.xx message now appears in the footer at the dis-
play, where x.xx may take a value between 0.00 and 10.0 . This
value is subtracted from the actual measuring results for all sub-
sequent R
LO
measurements, if the ROFFSET ON/OFF key has been
set to ON.
Roffset must be determined anew in the following cases:
• After switching to a different polarity option
• After switching from ON to OFF and back again
You can deliberately delete the offset value by switching ROFF-
SET from OFF to ON.
Note
Only use this function when performing measurements
with extension cables.
When different extension cables are used, the above
described procedure must always be repeated.
q Type / Polarity
The direction in which current flows can be selected here.
q Limits – Setting the Limit Value
The limit value for resistance can be set as desired. If measure-
ment values which exceed this limit occur, the red U
L
/R
L
LED
lights up. Limit values can be selected between 0.10 and
10.0 (editable). The limit value is displayed above the measured
value.
R
LO
ROFFSET: ON OFF
Polarity: +/- to PE
Polarity: +/- to PE
with ramp function
Limit value:
R
LO
> Limit Value
U
L
R
L
48 GMC-I Messtechnik GmbH
12.1 Measurements with Constant Test Current
Start Measurement
Press and hold for
long-term measurement
Attention!
!
The test probes should always be in contact with the DUT be-
fore pressing the Start t key.
If the object is energized, measurement is disabled as soon as
it is contacted with the test probes.
If the Start t key is pressed first and the test object is con-
tacted with the test probes afterwards, the fuse blows.
Which of the two fuses has blown is indicated in the pop-up
window with the error message by means of an arrow.
In the case of single-pole measurement, the respective value is
saved to the database as RLO.
Automatic Polarity Reversal
After the measuring sequence has been started, the instrument
performs measurement with automatic polarity reversal, first with
current flow in one direction, and then in the other. In the case of
long-term measurement (press and hold START key), polarity is
switched once per second.
If the difference between RLO+ and RLO– is greater than 10%
with automatic polarity reversal, RLO+ and RLO– values are dis-
played instead of RLO. The respectively larger value, RLO+ or
RLO–, appears at the top and is saved to the database as the
RLO value.
Evaluating Measurement Results
Differing results for measurements in both directions indicate volt-
age at the DUT (e.g. thermovoltages or unit voltages).
Measurement results can be distorted by parallel connected
impedances at load current circuits and by equalizing current,
especially in systems which make use of “overcurrent protection
devices” (previous neutralization) without an isolated protective
conductor. Resistances which change during measurement (e.g.
inductance), or a defective contact, can also cause distorted
measurements (double display).
In order to assure unambiguous measurement results, causes of
error must be located and eliminated.
In order to find the cause of the measuring error, measure resis-
tance in both current flow directions.
The instrument’s batteries are exposed to excessive stress during
insulation resistance measurement. For measurement with cur-
rent flow in one direction, only press and hold the START t key as
long as is necessary for the measurement.
Note
Measuring Low-Value Resistance
Measurement cable and 2-pole measuring adapter resis-
tance is compensated for automatically thanks to the four
conductor method and thus do not effect measurement
results. However, if an extension cable is used its resis-
tance must be measured and deducted from the mea-
surement results.
Resistances which do not demonstrate a stable value
until after a “settling in period” should not be measured
with automatic polarity reversal, but rather one after the
other with positive and negative polarity.
Examples of resistances whose values may change dur-
ing measurement include:
– Incandescent lamp resistance, whose values change
due to warming caused by test current
– Resistances with a great conductive component
– Contact resistance
Evaluation of Measured Values
See Table 4 on page 88.
Calculation of Cable Lengths for Common Copper Conductors
If the HELP key is activated after performing resistance measure-
ment, the cable lengths corresponding to common conductor
cross sections are displayed.
If results vary for the two different current flow directions, cable
length is not displayed. In this case, capacitive or inductive com-
ponents are apparently present which would distort the calcula-
tion.
This table only applies to cables made with commercially available
copper conductors and cannot be used for other materials (e.g.
aluminum)!
Polarity Selection Display Condition
+ pole to PE RLO+ None
– pole to PE RLO– None
pole to PE
RLO If RLO 10%
RLO+
RLO–
If RLO > 10%
GMC-I Messtechnik GmbH 49
12.2 Protective Conductor Resistance Measurement with Ramp Curve
– Measurements on PRCDs with Current-monitored Protective Conductor Using PROFITEST PRCD Test Adapter as Accessory
Application
In certain PRCD types, the protective conductor current is moni-
tored. Direct application or disconnection of the test current of
200 mA, which is required for protective conductor resistance
measurements, results in tripping of the PRCD and, conse-
quently, a cut-off of the protective conductor connection. Protec-
tive conductor measurement is no longer possible in this case.
A special ramp curve for the application or disconnection of the
test current in combination with the PROFITEST PRCD test adapter
allows for performing protective conductor resistance measure-
ments without PRCDs being tripped.
Timed Sequence of the Ramp Function
Due to the physical properties of the PRCD, the measuring cycles
of this ramp function lie within the range of several seconds.
Moreover, while the polarity of the test current is being reversed,
an additional waiting period during polarity reversal becomes nec-
essary.
This waiting period has been included in the test sequence in
operating mode „automatic polarity reversal“ .
If you change the polarity direction manu-
ally, e.g. from „+pole with ramp“
to „–pole with ramp“
, the test instrument recog-
nizes the change in the current flow direc-
tion, disables measurements for the
required waiting period and simultane-
ously shows the respective symbol, see figure on the right.
Visualization of the measuring and waiting phases during protective con-
ductor resistance measurements on PRCDs with the PROFITEST MXTRA
Tripping of a PRCD due to faulty contact
During measurement, safe contact between the test probes of the
2-pole adapter and the DUT or the sockets of the PROFITEST PRCD
test adapter is to be ensured. Interruptions may lead to heavy
fluctuations in the test current which may cause the PRCD to trip
in the worst case.
In this event, the tripping of the PRCD is
automatically recognized by the test
instrument as well and an error message
is generated, see figure on the right. In
this case as well, the test instrument
automatically takes into account the
required waiting period before re-
enabling the PRCD and allowing any new measurements.
Connection
➭ Please consult the operating instructions of the PROFITEST
PRCD adapter, particularly chapter 4.1. There you will also find
information on the connection terminals for offset measure-
ments and protective conductor resistance measurements.
Selecting Polarity Parameter
➭ Select the requested polarity parameter with
ramp.
Measuring ROFFSET
➭ Perform an offset measurement as described on page 47, to
assure that the test adapter‘s connector contacts are not in-
cluded in the measurement results.
Note
The offset only remains saved to memory until you
change the polarity parameter. If you perform the mea-
surement with manual polarity reversal (+pole or –pole),
you have to repeat the offset measurement before each
measurement with another polarity.
Measuring Protective Conductor Resistance
➭ Check whether the PRCD is activated. If this is not the case,
activate it.
➭ Perform the protective conductor measurement as described
above in section 12.1. Start the test sequence by briefly
pressing key ON/START. By pressing and holding key ON/START
you can extend the preset duration of the measuring phase.
Start measurement
During the magnetization phase (rising curve) and the
subsequent measuring phase (constant current) the
symbol on the right is shown.
If you abort the measurement during the rise phase, no measur-
ing result can be issued and displayed.
After the measurement, the demagnetization phase
(declining curve) and a subsequent waiting period is sig-
nalled with the inverse symbol shown on the right.
During this period, no new measurements are possible.
Only when the symbol on the right is shown, can the
measurement result be read and measurements started
with the same or another polarity.
Measuring phase Demagnetization
and waiting period
Result
Time [s]
Rise
phase
Test Current [ A]
01 3 6
0.25
prior to polarity reversal
or
restart
50 GMC-I Messtechnik GmbH
13 Measurement with Accessory Sensors
13.1 Current Measurement with Current Clamp Sensor
Bias, leakage and circulating current to 1 A, as well as leakage
current to 1000 A can be measured with the help of special cur-
rent clamp sensors, which are connected to sockets 15 and 16.
Attention!
!
Danger: High-Voltage!
Use only current clamp sensors which are specifically of-
fered as accessories by GMC-I Messtechnik GmbH.
Other current clamp sensors might not be terminated
with an output load at the secondary side. Dangerously
high voltage may endanger the user and the device in
such cases.
Attention!
!
Maximum input voltage at the test instrument!
Do not measure any currents which are greater than
specified for the measuring range of the respective
clamp.
Input voltage for clamp connector sockets 15 and 16 at
the test instrument may not exceed 1 V!
Attention!
!
Be sure to read and adhere to the operating instructions for
current clamp sensors and the safety precautions in-
cluded therein, especially those regarding the approved
measuring category.
Select Measuring Function
Selecting a Measuring Range at the Current Clamp Sensor
Set Parameters
The transformation ratio parameter must be correspondingly set
at the test instrument depending upon the respectively selected
measuring range at the current clamp sensor.
Specifying limit values results in automatic evaluation at the end of
the measurement.
Connection
Start Measurement
Tester Clamp Tester
Transforma-
tion Ratio
Parameter
Switch
WZ12C
Switch
Z3512A
Measuring
Range
WZ12C
Measuring
Range
Z3512A
Measuring
Range
1:1
1 V / A
1 mV / mA
x 1000 [mV/
A]
1 mA ... 15 A 0 ... 1 A 5 ... 999 mA
1:10
100 mV / A
— x 100 [mV/A] — 0 ... 10 A 0.05 ... 10 A
1:100
10 mV / A
— x 10 [mV/A] — 0 ... 100 A 0.5 ... 100 A
1:1000
1 mV / A
1 mV / A x 1 [mV/A] 1 A ... 150 A 0 ... 1000 A
5 ... 150 A/
999 A
Tester Clamp Tester
Transforma-
tion Ratio
Parameter
Switch
METRAFLEX P300
Measuring Range
METRAFLEX P300
Measuring
Range
1:1
1 V / A
3 A (1 V/A) 3 A 5 ... 999 mA
1:10
100 mV / A
30 A (100 mV/A) 30 A 0.05 ... 10 A
1:100
10 mV / A
300 A (10 mV/A) 300 A 0.5 ... 100 A
SENSOR
Output range,
clamp
Limit value:
I < and I > limit value
U
L
R
L
“I” with METRAFLEXP300
GMC-I Messtechnik GmbH 51
14 Special Functions – EXTRA Switch Position
Select EXTRA Switch Position
Overview of Special Functions
Selecting Special Functions
The list of special functions is accessed by pressing the upper-
most softkey. Select the desired function with the requested icon.
Softkey Meaning / Spe-
cial Function
MBASE+
M
TECH+
M
PRO
MXTRA
SECULIFE IP
Sec-
tion /
Page
Voltage drop
measurement
U function
✓✓
33
✓
sec-
tion
14.1
page
52
Standing sur-
face insulation
impedance
Z
ST
function
✓✓
33
✓
sec-
tion
14.2
page
53
Meter start-up
test
kWh function
✓✓
33
—
sec-
tion
14.3
page
54
Leakage Cur-
rent Measure-
ment
I
L
function
———
3
✓
sec-
tion
14.4
page
55
Check insula-
tion monitoring
device
IMD function
———
3
✓
sec-
tion
14.5
page
56
Residual volt-
age test
Ures function
———
3
—
sec-
tion
14.6
page
58
Intelligent ramp
ta + I function
———
3
—
sec-
tion
14.7
page
59
Residual cur-
rent monitor
(RCM)
RCM function
———
3
—
sec-
tion
14.8
page
60
Testing the op-
erating states
of electric vehi-
cles at charging
stations per
IEC 61851
—
✓
—
3
—
sec-
tion
14.9
page
61
Report genera-
tion of fault
simulations on
PRCDs with
PROFITEST
PRCD adapter
———
✓
—
sec-
tion
14.10
page
62
EXTRA
52 GMC-I Messtechnik GmbH
14.1 Voltage Drop Measurement (at Z
LN
) – U Function
Significance and Display of U (per DIN VDE 100, part 600)
Voltage drop from the intersection of the distribution network and
the consumer system to the point of connection of an electrical
power consumer (electrical outlet or device connector terminals)
should not exceed 4% of nominal line voltage.
Calculating voltage drop (without offset):
U = Z
L-N
• nominal current of the fuse
Calculating voltage drop (with offset):
U = (Z
L-N
- Z
OFFSET
) • nominal current of the fuse
U in % = 100 • U / U
L-N
See also section 9 regarding measurement procedure and connection.
Connection and Test Set-Up
Set Parameters
Note: When the nominal current I
N
is changed with existing
U
OFFSET,
the offset value is automatically adjusted.
Setting Limit Values
TAB Limit value per German technical connection conditions
for connection to low-voltage mains between the distribu-
tion network and the measuring device
DIN Limit value per DIN 18015-1: U < 3% between the mea-
suring device and the consuming device
VDE Limit value per DIN VDE 0100-520: U < 4% between the
distribution network and the consuming device (adjustable
up to 10% in this case)
NL Limit value per NIV: U < 5%
Measurement without OFFSET
Proceed as follows:
➭ Switch OFFSET from ON to OFF.
Determine OFFSET (as %)
Proceed as follows:
➭ Switch OFFSET from OFF to ON. “UOFFSET = 0.00%” is dis-
played.
➭ Connect the test probe to the point of common coupling
(measuring device / meter).
➭ Start measurement of offset with I
N
.
An intermittent acoustic signal sounds first,
which is then accompanied by a blinking
warning to prevent an offset value which has
already been saved from being unintentionally
deleted.
➭ Start the offset measurement by
pressing the release key again or
abort measurement by pressing the
key t ON/START (here = ESC).
U
OFFSET x.xx % is indicated, where x.xx may take a value
between 0.00 and 99.9 %.
An error message appears in a pop-up window in the event that
Z > 10 .
Start Measurement with OFFSET
1
2
Nominal current of the fuse:
Polarity selection: Lx-N
Diameter: 1.5 to 70 sq. mm
Cable types: NY..., H03... - H07...
Number of wires: 2 ... 10-strand
Tripping characteristics: B, L
2 to 160 A
Limit value
U % > limit value
U
L
R
L
U
Red
2
GMC-I Messtechnik GmbH 53
14.2 Measuring the Impedance of Insulating Floors and Walls
(standing surface insulation impedance) – Z
ST
Function
Measuring Method
The instrument measures the impedance between a weighted
metal plate and earth. Line voltage available at the measuring site
is used as an alternating voltage source. The Z
ST
equivalent circuit
is considered a parallel circuit.
Connection and Test Set-Up
Note: Use the measuring set-up described in section 11.2 (trian-
gular probe) or the one outlined below:
➭ Cover the floor or the wall at unfavorable locations, e.g. at
joints or abutments, with a damp cloth measuring approx.
270 x 270 mm.
➭ Place the 1081 Probe on top of the damp cloth and load the
probe with a weight of 750 N (75 kg, i.e. one person) for
floors, or 250 N (25 kg) for walls, e.g. press against the wall
with one hand which is insulated with a glove.
➭ Establish a conductive connection to the 1081 Probe, and
connect it to the probe connector socket at the instrument.
➭ Connect the instrument to a mains outlet with the test plug.
Attention!
!
Do not touch the metal plate or the damp cloth with your
bare hands.
No more than 50% line voltage may be applied to these
parts! Current with a value of up to 3.5 mA may flow!
The measured value would be distorted as well.
Start Measurement
Evaluate Measured Value
The measured value has to be evaluated after measurement has
been completed:
Resistance values must be measured at several points in order to
provide for adequate evaluation. Measured resistance may not be
less than 50 k at any given point. If the measured value is
greater than 30 M, Z
ST
> 30.0M always appears at the dis-
play panel.
In the event that “NOT OK” is selected, an error is indicated by the
UL/RL LED which lights up red.
See also Table 5 on page 89 with regard to evaluating measured
values.
The measured value cannot be saved to memory and included in
the test report until it has been evaluated.
Save Measured Value
OK
NOT OK
54 GMC-I Messtechnik GmbH
14.3 Testing Meter Start-Up with Earthing Contact Plug
– kWh Function (not SECULIFE IP)
Energy consumption meters can be tested for correct start-up
with this function.
Connection L – N
Earthing contact plug
Start Measurement
The meter is tested with the help of an internal load resistor and a
test current of approximately 250 mA. After pressing the start key,
test power is displayed and the meter can be tested for proper
start-up within a period of 5 seconds. The “RUN” pictograph is
displayed.
TN systems: All 3 phase conductors must be tested against N,
one after the other.
In other types of systems, all phase conductors (active conduc-
tors) must be tested against one another.
Note
If minimum power is not reached, the test is either not
started or aborted.
Evaluate Measured Value
The measured value has to be evaluated after measurement has
been completed:
In the event that “NOT OK” is selected, an error is indicated by the
UL/RL LED which lights up red.
The measured value cannot be saved to memory and included in
the test report until it has been evaluated.
Save Measured Value
Special Case
Start-up of energy consumption meters which are connected
between L and L or L and N can be tested with this function.
Connection L – L
2-Pole Adapter
Note
If an earthing contact outlet is not available, you can use
the 2-pole adapter. N must be contacted with the PE test
probe (L2), and then measurement must be started.
If PE is contacted with the PE test probe (L2) during the
meter start-up test, approximately 250 mA flow through
the protective conductor and any upstream RCD is
tripped.
OK
NOT OK
GMC-I Messtechnik GmbH 55
14.4 Leakage Current Measurement
with PRO-AB Leakage Current Adapter as Accessory
– I
L
Function (PROFITEST MXTRA & SECULIFE IP only)
Applications
Measurement of contact voltage in accordance with DIN VDE
0107, part 10, as well as continuous leakage and patient auxiliary
current per IEC 62353 (VDE 0750, part 1) / IEC 601-1 / EN 60
601-1:2006 (Medical electrical equipment – General requirements
for basic safety), is possible using the PRO-AB PRO-AB leakage
current measuring adapter as an accessory with the
PROFITEST MXTRA test instrument.
As specified in the standards listed above, current values of up to
10 mA may be measured with this measuring adapter. In order to
be able to fully cover this measuring range using the measure-
ment input provided on the test instrument (2-pole current clamp
input), the measuring instrument is equipped with range switching
between transformation ratios of 10:1 and 1:1. In the 10:1 range,
voltage dividing takes place at the same ratio.
Connection and Test Set-Up
In order to perform the leakage current measurement, the
adapter’s measurement outputs must be plugged into the mea-
surement inputs at the left-hand side of the PROFITEST MXTRA (2-
pole current clamp input and probe input).
Either of the leakage current measuring adapter’s inputs is con-
nected to reference earth (e.g. safe earth electrode / equipotential
bonding) via a measurement cable. The metallic housing (accessi-
ble part) of the device under test is contacted with a test probe or
alligator clip which is connected to the other input by means of a
second measurement cable.
Testing the PRO-AB Adapter
The adapter should be tested before use and at regular intervals
(see adapter operating instructions).
Measuring Sequence
Refer to the operating instructions for the PRO-AB leakage cur-
rent measuring adapter regarding performance of the measure-
ment.
Attention!
!
The test plug should be located in the storage slot during
leakage current measurement. Under no circumstances
may the test plug be connected with any system compo-
nents, including PE / ground potential (measured values
might otherwise be distorted).
The measurement can be started or stopped by pressing the
“START” key. Leakage current measurement is a long-term mea-
surement, i.e. it continues until it is stopped by the user. The
momentary measured value is display continuously during mea-
surement.
Note
The self-test must be deactivated in the menu (set
“TEST ON/OFF” function key to “OFF”) in order to perform a
measurement.
Always start with the large measuring range (10:1), unless there’s
no doubt that small measured values can be expected, in which
case the small measuring range can be used (1:1). The measuring
range must be selected at the measuring adapter, as well as in
the menu using the corresponding function key (RANGE). It must
be assured that the range settings at the adapter and at the test
instrument are always identical, in order to prevent any distortion
of measurement results.
Depending on the magnitude of the measured values, the range
setting can, or must (in the case of overranging), be manually cor-
rected at the measuring adapter and the test instrument.
Individual limit values can be adjusted after pressing the “Limits”
function key. Exceeded limit values are indicated by the red limit
value LED at the test instrument.
56 GMC-I Messtechnik GmbH
14.5 Testing of Insulation Monitoring Devices – IMD Function
(PROFITEST MXTRA & SECULIFE IP only)
Applications
Insulation monitoring devices (IMDs) or earth fault detection sys-
tems (EDSs) are used in IT systems in order to monitor adherence
to a minimum insulation resistance value, as specified by
DIN VDE 0100-410.
They’re used in power supplies for which a single-pole earth fault
may not result in failure of the power supply, for example in oper-
ating rooms or photovoltaic systems.
Insulation monitors can be tested with the help of this special
function. After pressing the ON/START button, an adjustable insula-
tion resistance is activated between one of the two phases of the
IT system to be monitored and ground to this end. This resistance
can be changed in the “MAN±” manual sequence mode with the
help of the “+” or “–” softkey, or varied automatically from R
max
to
R
min
in the “AUTO” operating mode. Testing is ended by once
again pressing the ON/START key.
Time during which the momentary resistance value prevails since
changing the value at the system is displayed. The IMD’s display
and response characteristics can be subsequently evaluated and
documented with the help of the “OK” or “NOT OK” softkey.
Connection L – N
Set Parameters
– MAN/AUTO (1)
Switch between manual
measuring sequence
MAN
and automatic measuring
sequence
AUTO
– Change conductor
relationship and limit
values (2)
Quick switching between
L1-PE and L2-PE (also
during measurement) with
the I
N
key
– Changing the initial resistance (3)
You can select the initial
resistance here to start
each series of measure-
ments for manual mea-
suring sequences.
The GOME setting
(default settings) sets
the initial value to a
resistance value of
50.0 k.
Set Limit Values for R
L-PE
as %
Limit values are calculated and displayed as a percentage of the
momentarily displayed R
L-PE
value.
Manual Measuring Sequence
The measurement and the stopwatch (see arrow) are started with
the “START” key.
The stopwatch is restarted each time the resistance value is
changed and whenever the energized phase conductor is
switched (L1/L2).
During measurement, the conductor relationship (L1-PE or L2-
PE) can be changed with the I
N
key or the resistance value can
be adjusted with the + and – keys, without interrupting the mea-
surement. The stopwatch is reset in both cases.
Increasing + or Decreasing – the Resistance Value
(The setting values themselves are fixed!)
The bar graph display provides you with quick orientation. The
numeric combination which appears below it indicate the
momentary step from as many as 65 steps (in this case step 17 of
65).
Automatic Measuring Sequence
In the case of the automatic measuring sequence, the sequence
runs through all resistance values from the maximum to the mini-
mum value (Rmax (2,51 M) to Rmin (20 k)) in 65 steps, and
dwell time for each step is 2 seconds.
1
3
2
Limit value:
I < and I > limit values
U
L
R
L
GMC-I Messtechnik GmbH 57
Evaluation
In order to evaluate the measurement, it must be stopped. This
applies to manual as well as automatic measurement. Press the
“START” or “ESC” key to this end. The stopwatch is stopped and
the evaluation window appears.
Press the “NOT OK”, “START” or “ESC” key in order to reject the
measurement.
Retrieving Saved Measured Values
The measured value cannot be saved to memory and included in
the test report until it has been evaluated (see also section 16.4).
With the help of the key shown at the right
(MW: measured value / PA: parameter), the setting
parameters can be displayed for this measurement.
OK
NOT OK
58 GMC-I Messtechnik GmbH
14.6 Residual Voltage Test – Ures Function (PROFITEST MXTRA only)
Applications
The EN 60204 standard specifies that after switching supply
power off, residual voltage must drop to a value of 60 V or less
within 5 seconds at all accessible, active components of a
machine to which a voltage of greater that 60 V is applied during
operation.
With the PROFITEST MXTRA, testing for the absence of voltage is
performed as follows by means of a voltage measurement which
involves measuring discharge time tu:
In the case of voltage dips of greater than 5% of momentary line
voltage (within 0.7 seconds), the stopwatch is started and
momentary undervoltage is displayed as Ures after 5 seconds,
and indicated by the red UL/RL LED.
The function is ended after 30 seconds, after which Ures and tu
data can be deleted and the function can thus be restarted by
pressing the ESC key.
Connection
Limit Values
Setting Limit Values
Measuring Sequence – Long-Term Measurement
Testing is selected as a
continuous measure-
ment because residual
voltage testing is trig-
gered automatically and
voltage measurement is
always active for safety
reasons.
Note
If, for example, conductors are exposed when a machine
is switched off – e.g. if plug connectors are disengaged –
which are not protected against direct contact, maximum
allowable discharge time is 1 second!
Limit value:
U % > limit value
U
L
R
L
U
GMC-I Messtechnik GmbH 59
14.7
Intelligent Ramp – ta+I
Function (PROFITEST MXTRA only)
14.7.1 Applications
The advantage of this measuring function in contrast to individual
measurement of I
N
and t
A
is the simultaneous measurement of
breaking time and breaking current by means of a test current
which is increased in steps, during which the RCD is tripped only
once.
The intelligent ramp is
subdivided into time
segments of 300 ms
each between the initial
current value (35% I
N
)
and the final current
value (130% I
N
). This
results in a gradation for
which each step corre-
sponds to a constant
test current which is
applied for no longer
than 300 ms, assuming
that tripping does not
occur.
And thus both tripping
current and tripping time are measured and displayed.
Connection
Set Parameters
Start Contact Voltage Measurement
Start Tripping Test
The measurement sequence can be broken off prematurely at
any time by pressing the ON/START key.
Measurement Results
Nominal residual current:
Type 1: RCD, SRCD, PRCD etc.
Nominal current: 6 ... 125 A
Type 2: AC , A/F , B *
* Type B = AC/DC sensitive
10 ... 500 mA
Contact voltage:
< 25 V, < 50 V, < 65 V
60 GMC-I Messtechnik GmbH
14.8 Testing Residual Current Monitors
– RCM Function (PROFITEST MXTRA only)
General
Residual current monitors (RCMs) monitor residual current in elec-
trical systems and display it continuously. As is also the case with
residual current devices, external switching devices can be con-
trolled in order to shut down supply power in the event that a
specified residual current value is exceeded.
However, the advan-
tage of an RCM is that
the user is informed of
fault current within the
system before shutdown
takes place.
As opposed to individual
measurement of I
N
and
t
A
, measurement results
must be evaluated man-
ually in this case.
If an RCM is used in
combination with an
external switching
device, the combination
must be tested as if it
were an RCD.
Connection
Set Parameters for I
F
Measure Contact Voltage
Non-Tripping Test with 1/2 x I
N
and 10 s
After 10 seconds have passed, no fault current may be signalled.
The measurement must be evaluated afterwards. In the event that
“NOT OK” is selected (in case of false alarm), an error is indicated
by the UL/RL LED which lights up red.
The measured value cannot be saved to memory and included in
the test report until it has been evaluated.
Tripping Test with 1 x I
N
– Measurement of Signal Response Time (stopwatch function)
with the Residual Current Generated by the Test Instrument
In order to document the tripping time, the measurement must be
stopped manually with the ON/START or I
N
key immediately after
the fault current has been signalled.
In the event that “NOT OK” is selected, an error is indicated by the
UL/RL LED which lights up red.
The measured value cannot be saved to memory and included in
the test report until it has been evaluated.
Nom. res. current: 10 ... 500 mA
Waveform:
Nominal current: 6 ... 125 A
Type: A , B *
* Type B = AC/DC sensitive
X times tripping current:
Connection: without/with probe
System type: TN/TT, IT
Contact voltage:
< 25 V, < 50 V, < 65 V
GMC-I Messtechnik GmbH 61
14.9 Testing the Operating States of Electric Vehicles at
Charging Stations per IEC 61851 (MTECH+ & MXTRA only)
A charging station is an equipment designed for the charging of elec-
tric vehicles per IEC 61851which essentially consists of a plug con-
nector, a cable protection, a residual current device (RCD), as well as
a circuit breaker and a security communication system (PWM).
Depending on the place of installation and application, further func-
tional features such as mains connection and meter may be included.
Adapter selection (test box)
Simulation of operating states per IEC 61851with the MENNEKES test box
(Status A – E)
The MENNEKES test box only serves the purpose of simulating dif-
ferent operating states of an electric vehicle fictitiously connected
with a charging station. The settings for the simulated operating
states are indicated in the operating instructions for the test box.
The simulated operating states can be stored in the MTECH+ or
MXTRA as visual inspection and documented in the ETC software.
The operating state (status) to be tested is selected with the
SECLECT STATUS key at the MTECH+ or MXTRA test instrument.
Status A – Charging conductor only connected with charging point
• CP signal is switched on,
• voltage between PE and CP is 12 V.
Status B – Charging conductor connected with charging point and
vehicle
• the charging conductor is locked at the charging point and in
the vehicle,
• vehicle not yet ready for charging,
• voltage between PE and CP is +9 V / –12 V.
Status C – Non-gassing vehicle identified
• Readiness for charging on the vehicle/power side is activated,
• Voltage between PE and CP is +6 V / –12 V.
Status D – Gassing vehicle identified
• Readiness for charging on the vehicle/power side is activated,
• Voltage between PE and CP is +3 V / –12 V.
Status E – Conductor is damaged
• Short circuit between PE and CP,
• Charging conductor is unlocked at the charging point,
• Voltage between PE and CP is +0 V.
Semi-automatic changing between operating states
As an alternative to the manual
changing between operating
states via the parameter menu
of the SECLECT STATUS softkey
at the test instrument, there is
another fast and convenient
way of changing between the
operating states: select status
parameter AUTO. Each time
after replying to and storing a
visual inspection, an automatic
changeover to the next state
takes place, with the keys
shown on the display corre-
sponding to 01/05 A/E (01 = A, 02 = B, 03 = C, 04 = D, 05 = E).
It is possible to skip the status variants by pressing key I
N
at the
test instrument or at the test socket.
62 GMC-I Messtechnik GmbH
14.10 Test Sequences for Report Generation of Fault Simulations
on PRCDs with PROFITEST PRCD
Adapter (MXTRA only)
The following functions can be performed when the
PROFITEST MXTRA test instrument is connected with the PROFITEST
PRCD test adapter:
• Three test sequences are preconfigured:
– PRCD-S (single phase/3-pole)
– PRCD-K (single phase/3-pole)
– PRCD-S (three-phase/5-pole)
• The test instrument guides you through all test steps in a
semi-automatic fashion:
Single phase PRCDs:
– PRCD-S: 11 test steps
– PRCD-K: 4 test steps
3-phase PRCDs:
– PRCD-S: 18 test steps
• Each test step is assessed and evaluated by the user (OK/not
OK) for subsequent report generation purposes.
• Measurement of protective conductor resistance of the PRCD
by means of function R
LO
at the test instrument. Please note
that the protective conductor measurement represents a
modified RLO measurement with ramp curve for PRCDs, see
section 12.
• Measurement of insulation resistance of the PRCD by means
of function R
ISO
at the test instrument, see section 11.
• Trip test with nominal fault current by means of function I
F
at the test instrument, see section 7.3.
• Measurement of tripping time by means of function I
N
at the
test instrument, see section 7.3.
• Varistor test with PRCD-K: measurement via ISO ramp, see
section 11.
Attention!
!
It is imperative that you read the operating instructions
for PROFITEST PRCD before connecting the
PROFITEST MXTRA with the PRCD adapter.
14.10.1 Selecting the PRCD under Test
14.10.2 Parameter Settings
Meaning of Symbols for the Respective Fault Simulation
Parameter PRCD-S single phase – 11 parameters = 11 test steps
Together with the required intermediate steps for PRCD activation
(=ON), the parameters for the fault simulations represent die 11
potential test steps:
Interruption (BREAK...), conductor exchange (L1 <-> PE),
PE to phase (Uext -> PE), contacting of key ON, protective con-
ductor current measurement (Figure on the right: PRCD-Ip) .
Parameter PRCD-S 3-phase – 18 parameters = 18 test steps
Parameter PRCD-K single phase – 5 parameters = 5 test steps
Switch
Position
PROFIT-
EST PRCD
Symbols shown at
PROFITEST MXTRA
Meaning of Symbols
Parameter
Setting
Menu
Display
ON 1~ON
Activate single phase PRCD
ON 3~ON
Activate 3-phase PRCD
BREAK Lx
Disconnection of conductor
Lx <-> PE
Lx <-> N
Conductor exchange between
phase conductor and PE or
neutral conductor
PE-U
EXT
Uext -> PE
PE to phase
PROBE
Contact key ON at PRCD with
probe
PRCD-Ip
Protective conductor current
measurement with current
clamp transformer
—AUTOAUTO
Semi-automatic changing of
fault simulations
GMC-I Messtechnik GmbH 63
14.10.3 Test Sequence PRCD-S (single phase) – 11 Test Steps
Selection Examples
Simulation Interruption (Steps 1 to 6)
Simulation Conductor Exchange (Step 7)
Simulation PE to Phase (Step 8)
Contacting Key ON at PRCD with Probe (Step 10)
Measurement of Protective Conductor Current with a Current
Clamp Transformer (Step 11)
14.10.4 Test Sequence PRCD-S (three-phase) – 18 Test Steps
Selection Examples
Simulation Interruption (Steps 1 to 10)
Simulation Conductor Exchange (Steps 11 to 16)
Simulation PE to Phase (Step 17)
Measurement of Protective Conductor Current with Current Clamp
Transformer (Step 18)
Semi-automatic Change of Fault Simulations (Statuses)
As an alternative to changing
manually between the fault sim-
ulations via the parameter menu
of the respective PRCD selec-
tion PRCD-S 1~, PRCD-K 1~ or
PRCD-S 3~ at the test instru-
ment, it is possible to switch
quickly and conveniently
between the fault simulations.
Select status parameter AUTO
for this purpose. After replying
to and storing each visual
inspection, an automatic
switch-over to the next fault simulation takes place. Individual fault
simulations can be skipped by pressing key I
N
at the test instru-
ment or at the test plug.
64 GMC-I Messtechnik GmbH
15 Automatic Test Sequences – AUTO Function
If the same order of tests with subsequent report generation is to
be performed repeatedly, as is, for example, specified by certain
standards, we recommend using test sequences.
With the help of test sequences it is possible to compile auto-
matic test procedures on the basis of the manual individual mea-
surements. A test sequence consists of up to 200 individual test
steps which have to be processed one after the other.
Basically, a distinction is made between three types of individual
steps:
• Note: the test procedure is interrupted by a pop-up note for
the test engineer. It is not continued before the test engineer
acknowledges the note.
Example: Note prior to insulation resistance measurement:
„Disconnect the device from the mains!“
• Visual inspection, testing and report: the test procedure is inter-
rupted by a pop-up window of a passed/failed evaluation,
comments on and results of the evaluation are saved in the
database.
• Measurement: Measurement like the individual measurements
performed by the test instruments with data storage and
parameter configuration.
The test sequences are created at a PC by means of the ETC
software and are then transferred to the test instruments.
The measurement parameters are also configured at a PC. How-
ever, they can still be modified at the test instrument during the
test procedure before the respective measurement is launched.
After restarting the test step, the parameter settings defined in
ETC are loaded.
Note
The parameters are not subjected to a plausibility check
by the ETC software. We therefore advise you to test the
newly created test sequence at the test instrument before
filing it permanently in your database.
Limit values are currently not defined in ETC, but have to be
adjusted during the automatic test sequence.
Menu for the Processing of Test Sequences
In order to process existing test sequences, to add, for example,
further test sequences or to adjust parameter settings, they have
to be loaded to the ETC PC software beforehand.
There are two possibilities to do this:
•ETC: Extras Test sequences Load test sequences
(from file „pruefsequenzenxyz.seq“)
or
• ETC: Device Test sequences Receive test sequences
(from the connected test instrument PROFITEST MPRO or
PROFITEST MXTRA)
Step-by-step Overview: Generating Test Sequences at the PC
1 Generate new test sequence – enter denomination
2 Change denomination of the selected test sequence
3 Duplicate selected test sequence,
(copy) is added at the end of the duplicated name
4 Delete selected test sequence
5 Generate and/or add new test step for selected test sequence
– Choose the type of test step from the list and accept or modify the
denomination
6 Duplicate selected test step
7 Delete selected test step
8 Change the order of the selected test steps
9 Select measuring parameters for the selected type of test step from the list
10 Choose the setting for the measuring parameters from the list
11 Accept modification for the measuring parameter
12 Close test sequence menu
Saving Test Sequences to the ETC Software at the PC
We recommend saving the test sequences of the default setting,
modified as well as newly created test sequences via command
„Extras Test sequences Save test sequences“ to the PC or
other storage media under a file name (testsequencesxyz.seq).
This helps to prevent data loss as a result of certain administrative
operations, see the following remarks.
As a maximum of 10 test sequences can be transferred to the
test instrument, it is not possible to save more than 10 test
sequences in one file.
Via command „Extras Test sequences Load test
sequences“ the test sequences saved to a file can be reloaded to
the ETC software at any time.
For subsequent processing select command
„Extras Test sequences Edit test sequences“.
Please note that the active test sequences in the ETC software are
deleted by the following operations:
• by receiving test sequences from the test instrument
(ETC: Device Test sequences Receive test sequences)
• by changing the user language (ETC: Language ...)
• by saving the data from the test instrument
(ETC: Device Backup/Restore Backup)
1 2 3 4
5 6 7
8
109
11 12
Verwendetes Prüfgerät
auswählen!
!
GMC-I Messtechnik GmbH 65
Please note that the test sequences loaded to the test instrument
are deleted by the following operations in the test instrument:
• by receiving selection lists from the PC
(ETC: Device Selection lists Transmit selection lists)
• by receiving new test sequences from the PC
(ETC: Device Test sequences Send test sequences)
• by transmitting the saved data to the test instrument
(ETC: Device Backup/Restore Restore)
• by resetting to default settings
(Switch position SETUP key GOME SETTING)
• by firmware updates
• by changing the user language
(Swith position SETUP key CULTURE)
• by deleting the entire database in the test instrument
Transferring Test Sequences from the PC to the Test Instrument
After activating the ETC command „Device Test sequences
Send test sequences“ all test sequences that have been created
(maximum of 10) are transferred to the connected test instrument.
During the transfer of the
test sequences the
above progress bar-
graph is shown at the
PC screen and the right-
hand image appears on
the display of the test
instrument.
After the data transfer
has been completed,
the display switches to
the storage menu „data-
base“.
By pressing ESC you
proceed to the measure-
ment menu display of the current switch position.
Selecting Switch Position AUTO at the Test Instrument
When the rotary switch is set to AUTO, all existing test sequenes
in the instrument are displayed, see figure 15.1.
If there are no test sequences in the instrument, message „NO
DATA“ appears.
Selecting and Starting a Test Sequence at the Test Instrument
Figure 15.1
Press the START key to launch the selected test sequence (here:
SEQU.1).
When executing a test step of the measurement type, the display
structure known from the individual measurements is shown.
Instead of the storage and battery symbol, the current test step
number is shown in the header (here: step 01 of 06), see figure
15.2. The next test step is shown after pressing the „Save“ key
twice.
Setting Parameters and Limit Values
Parameters and limit values can also be modified while performing
a test sequence or before starting the measurement. This modifi-
cation only affects the active test procedure and is not saved.
Skipping of Test Steps
There are two possibilities to skip test steps and/or individual
measurements:
• Activate test sequence, switch to the right-hand test step col-
umn with the cursor, select the x
th
test step and press key
START.
• Within a test sequence, the navi-
gation menu is activated by press-
ing the navigation key Cursor left-
right. Switch to the previous or
next test step with the cursors
which are now displayed sepa-
rately.
Leave the navigation menu and reactivate the current test step
with ESC.
Interrupt or Abort a Test Sequence
An active sequence is aborted with ESC and subsequent confir-
mation.
When the last test step is completed, the message „Sequence
completed“ is shown. After confirming this message, the start
menu „List of test sequences“ appears on the display.
Figure 15.2
AUTO
66 GMC-I Messtechnik GmbH
16 Database
16.1 Creating Distributor Structures, General
A complete distributor structure with data for electrical circuits
and RCDs can be created in the PROFITEST MASTER test instru-
ment.
This structure makes it possible to assign measurements to the
electrical circuits of various distributors, buildings and customers.
There are two possible procedures:
• On location or at the
construction site:
Create the distributor
structure in the test
instrument.
A distributor struc-
ture with up to
50,000 structural
elements can be
created in the test
instrument, which is
saved to the instru-
ment’s flash mem-
ory.
or
• Create and save an image of an existing distributor structure
at a PC with the help of ETC report generating software (Electric
Testing Center) (see condensed operating instructions for ETC
report generating software). The distributor structure is then
transferred to the test instrument.
Note regarding ETC Report Generating Software
The following steps must be completed before using the soft-
ware:
• Install USB device drivers:
(required for operation of PROFITEST MASTER with a PC)
GMC-I Driver Control software can be downloaded from
Gossen Metrawatt's website at:
http://www.gossenmetrawatt.com
Products Software Software for Testers
Utilities Driver Control
• Install ETC report generating software:
You can download the current ETC version free of charge from
our homepage under section mygmc after registration or login:
http://www.gossenmetrawatt.com
Products Software Software for Testers
Protocol Software without Database
ETC
myGMC
zum Login
16.2 Transferring Distributor Structures
The following data transfer operations are possible:
• Transfer a distributor structure from the PC to the test instru-
ment.
• Transfer a distributor structure including measured values
from the test instrument to the PC.
The test instrument and
the PC must be con-
nected with a USB cable
in order to transfer dis-
tributor structures and
data.
The following image
appears at the display
during transfer of struc-
tures and data.
16.3 Creating a Distributor Structure in the Test Instrument
GMC-I Messtechnik GmbH 67
Overview of the Meanings of Icons used to Create Structures
Distributor Structure Symbology / Tree Structure
16.3.1 Creating Structures (example for electrical circuit)
After selection with the MEM key, all setting options for the cre-
ation of a tree structure are made available on three menu pages
(1/3, 2/3 and 3/3). The tree structure consists of structural ele-
ments, referred to below as objects.
Icon Meaning
Main
Level
Sub-
Level
Memory menu, page 1 of 3
Cursor UP: scroll up
Cursor DOWN: scroll down
ENTER: acknowledge selection
+ – change to sub-level
(open directory) or
– + change to main level
(close directory)
Display of complete structure designation (max.
63 characters) or ID number (max. 25 characters)
in a zoom window
Temporarily switching back and forth between
structure designation and ID number.
These keys do not interfere with the main configu-
ration in the setup menu, see DB MODE on
page 11.
Hide structure designation or ID number
Change display to menu selection
Memory menu, page 2 of 3
Add a structural element
Meaning of icons from top to bottom:
Customer, building, distributor, RCD, electrical cir-
cuit, operating equipment, machine and earth
electrode (display of the icons depends on the
selected structural element).
Selection: UP/DOWN scroll keys and
In order to add a designation to the selected
structural element, refer to edit menu in following
column.
EDIT
For additional icons see edit menu below
Delete the selected structural element.
Show measurement data, if a measurement has
been performed for this structural element.
Edit the selected structural element.
Memory menu, page 3 of 3
Search for ID number.
> Enter complete ID number.
Search for text.
> Enter full text (complete word).
Search for ID number or text.
Continue searching.
Edit menu
Cursor LEFT:
Select an alphanumeric character
Cursor RIGHT:
Select an alphanumeric character
ENTER: accept an individual character
Acknowledge entry
Cursor left
Cursor right
Delete characters
Switching amongst different types of alphanu-
meric characters:
A Upper case letters
aLower case letters
0 Numbers
@ Special characters
Icon Meaning
Distributor
A check mark to the right of a structural element means that all measurements
within the respective hierarchy have been passed.
Smbol x: at least one measurement has not been passed.
No symbol: Measurement has not yet been performed.
Building
Customer
RCDs
Electr. circuit
Equipment
Same type of element as in the Windows Explorer:
+: sub-object available, display by pressing .
–: sub-objects are displayed, hide by pressing .
Equipment
68 GMC-I Messtechnik GmbH
Select the position at which a new object will be added.
Use the  keys in order to select structural elements.
Change to the sub-level with the key.
Go to the next page with the >> key
Create a new object.
Press the key in order to create a new object.
Select a new object from a list.
Select the desired object from the list with the  keys and
acknowledge with the key.
Depending upon the profile selected in the test instrument’s
SETUP menu (see section 4.6), the number of object types may
be limited, and the hierarchy may be laid out differently.
Enter a designation.
Enter a designation and then acknowledge it by entering a 3.
Note
Acknowledge the standard or adjusted parameters
shown below, because the created designation will oth-
erwise not be accepted and saved.
Set Electrical Circuit Parameters
For example, nominal current values must be entered here for the
selected electrical circuit. Measuring parameters which have been
accepted and saved in this way are subsequently accepted by
the current measuring menu automatically when the display is
switched from the structural view to measurement.
Note
Electrical circuit parameters changed during structure
creation are also retained for individual measurements
(measurement without saving data).
If you change the electrical circuit parameters defined in the
structure of the test instrument, a warning is issued upon
saving, see error message on page 81.
16.3.2 Searching for Structural Elements
The search always starts with database, regardless of the currently
marked object.
Scroll up
Scroll down
Acknowledge selection /
Display object
Nextpage
change level
or ID number
Create object
Delete object
VA: show measurement data
Edit designation
Scroll up
Scroll down
Acknowledge selection
Select character
Select character
Accept character
Delete characters
Character selection:
3 Save object designation
A, a, 0, @
Select parameter
List of parameter settings
Acknowledge parameter selection
Acknowledge parameter setting
and return to page 1/3
Select parameter setting
in the database menu.
Scroll up
Scroll down
Acknowledge selection /
Display object
Menu selection page 3/3
change level
or ID number
GMC-I Messtechnik GmbH 69
Go to page 3/3 in the database menu.
After selecting text search
and entering the desired text (only full matches are found – no
wild cards, case sensitive)
the first match is displayed.
Further matches can be found by selecting
the icon shown at the right.
If no further matches are found, the message shown above is dis-
played.
16.4 Saving Data and Generating Reports
Preparing and Executing a Measurement
Measurements can be performed and stored to memory for each
structural element. Proceed as follows, adhering to the prescribed
sequence:
➭ Select the desired measurement with the rotary knob.
➭ Start the measurement by pressing the ON/START or I
N
key.
Upon completion of measurement, the “ Floppy Disk” softkey is
displayed.
➭ Briefly press the “Save Value” key.
The display is switched to the memory menu or the
structural view.
➭ Navigate to the desired memory location, i.e. to the desired
structural element / object, for which the measurement data
will be saved.
➭ If you would like to save a comment along with the
measurement, press the key shown at the right and
enter a designation via the “EDIT” menu as described in
section 16.3.1.
➭ Complete data storage by pressing the “STORE” key.
Storage of Error Messages (Pop-ups)
If a measurement is completed without a measured value being
produced on account of an error, this measurement can be saved
to memory along with the pop-up via the „Save Value“ key. In the
ETC the corresponding text is given out instead of the pop-up
smybol. This only applies to a limited selection of pop-ups, see
below. In the database of the test instrument, neither the symbol
nor the text can be retrieved.
Alternative Storage Procedure
➭ The measured value can be saved to the last se-
lected object in the structural diagram by pressing
and holding the “Save Value” key, without switching
the display to the memory menu.
Note
If you change the parameters in the measurement view,
they are not saved for the structural element. A measure-
ment with changed parameters can nevertheless be
saved to the structural element, and any changed param-
eters are documented in the report for each measure-
ment.
Retrieving Saved Measured Values
➭ Switch the display to the distributor structure by pressing the
MEM key and select the desired electrical circuit with the scroll
keys.
➭ Switch to page 2
by pressing the key shown here:
➭ Display the measurement data
by pressing the key shown here:
Search for ID number
Search for text
Search for ID number or text
Select character
Select character
Accept character
Delete characters
Character selection:
3 Save object designation
Continue searching
Search for ID number
Search for text
End search
Search for ID number or text
70 GMC-I Messtechnik GmbH
One measurement with date
and time, as well as any com-
ment you might have entered, is
displayed in each screen.
Example:
RCD Measurement
Note
A check mark in the header means that the respective
measurement has been passed.
An X means that the measurement has not been passed.
➭ Scrolling amongst measurements
is possible with the keys shown here:
➭ The measurement can be deleted with the key
shown here:
A prompt window asks you to confirm dele-
tion.
With the help of the key shown at the right (MW: mea-
sured value / PA: parameter), the setting parameters
can be displayed for this measurement.
➭ Scrolling amongst measurements
is possible with the keys shown here:
Data Evaluation and Report Generation with ETC Software
All data, including the distributor structure, can be transferred to
the PC and evaluated with the help of ETC software. Additional
information can be entered here subsequently for the individual
measurements. After pressing the appropriate key, a report
including all measurements within a given distributor structure is
generated, or the data are exported to an Excel spreadsheet.
Note
The database is exited when the rotary selector switch is
turned. Previously selected parameters in the database
are not used for the measurement.
16.4.1 Use of Barcode Scanners and RFID Readers
Search for an Already Scanned Barcode
The search can be started from any switch setting and menu.
➭ Scan the object’s barcode.
The found barcode is displayed inversely.
➭ This value is accepted after pressing the ENTER key.
Note
A previously selected object is not taken into consider-
ation by the search.
Continued Searching in General
Regardless of whether or not an object has been found,
searching can be continued by pressing this key:
– Object found: Searching is continued underneath the pre-
viously selected object.
– No further object found: The entire database is searched
at all levels.
Reading In a Barcode for Editing
If the menu for alphanumeric entry is active, any value scanned by
means of a barcode or RFID reader is accepted directly.
Using a Barcode Printer (accessory)
A barcode printer allows for the following applications:
• Read-out of ID numbers encrypted as barcodes; for quick
and convenient acquisition for periodic testing
• Read-out of repeatedly occurring designations such as test
object types encrypted as barcodes in a list, allowing them to
be read in as required for comments.
GMC-I Messtechnik GmbH 71
17 Operating and Display Elements
Test Instrument and Adapter
(1) Control Panel – Display Panel
The following are displayed at the LCD:
• One or two measurement values as three place numeric dis-
play with unit of measure and abbreviated measured quantity
• Nominal values for voltage and frequency
• Circuit diagrams
• On-line help
• Messages and instructions
The display and control panel can be swiveled forward or back-
ward with the detented swivel hinge. The instrument can thus be
set to the optimum reading angle.
(2) Eyelets for the Shoulder Strap
The included shoulder strap can be attached at the right and left
hand sides of the instrument. You can hang the instrument from
your shoulder and keep both hands free for measurement.
(3) Rotary Selector Switch
The following basic functions can be selected with this rotary
switch:
SETUP / I
N
/ I
F
/ Z
L-PE
/ Z
L-N
/ R
E
/ R
LO
/ R
ISO
/ U / SENSOR /
EXTRA / AUTO
The various basic functions are selected by turning the function
selector switch while the instrument is switched on.
(4) Measuring Adapter
Attention!
!
The measuring adapter (2-pole) may only be used to-
gether with the test instrument’s test plug.
Use for other purposes is prohibited!
The plug-on measuring adapter (2-pole) with the two test probes
is used for measurements in systems without earthing contact
outlets, e.g. at permanent installations, distribution cabinets and
all three-phase outlets, as well as for insulation resistance and
low-value resistance measurements.
The 2-pole measuring adapter can be expanded to three poles for
phase sequence testing with the included measurement cable
(test probe).
(5) Plug Insert (country-specific)
Attention!
!
The plug insert may only be used together with the test
instrument’s test plug.
Use for other purposes is prohibited!
After the plug insert has been attached, the instrument can be
directly connected to earthing contact outlets. You need not con-
cern yourself with poling at the plug. The instrument detects the
positions of phase conductor L and neutral conductor N and
automatically reverses polarity if necessary.
The instrument automatically determines whether or not both pro-
tective contacts in the earthing contact outlet are connected to
one another, as well as to the system protective conductor, for all
types of protective conductor measurements when the plug insert
is attached to the test plug.
(6) Test Plug
The various country specific plug inserts (e.g. protective contact
plug insert for Germany or SEV plug insert for Switzerland) or the
measuring adapter (2-pole) are attached to the test plug and
secured with a threaded connector.
The controls on the test plug are subject to interference suppres-
sion filtering. This may lead to slightly delayed responses as
opposed to controls located directly on the instrument.
(7) Alligator Clip (plug-on)
(8) Test Probes
The test probes comprise the second (permanently attached) and
third (plug-on) poles of the measuring adapter. A coil cable con-
nects them to the plug-on portion of the measuring adapter.
(9) ON/Start t Key
The measuring sequence for the func-
tion selected in the menu is started by
pressing this key, either on the test
plug or at the control panel. Exception: If the instrument is
switched off, it can only be switched on by pressing the key at the
control panel.
This key has the same function as the t key on the test plug.
(10) I
N
/ I Key (at the control panel)
The following sequences are triggered
by pressing this key, either on the test
plug or at the control panel:
• Starts the tripping test after measurement of contact voltage
for RCCB testing (I
N
).
• Measurement of R
OFFSET is started within the R
LO
/ Z
L-N
function.
• Semiautomatic polarity reversal (see section 5.8)
(11) Contact “Surfaces
The contact surfaces are located at both sides of the test plug.
When the contact plug is grasped in the hand, contact is automati-
cally made with these surfaces. The contact surfaces are electri-
cally isolated from the terminals and from the measuring circuit.
When the rotary switch is set to the “U” position, the instrument
can be used as a phase tester for protection class II devices!
In the event of a potential difference of greater than 25 V between
protective conductor terminal PE and the contact surface, PE is
displayed (see also section 18, “LED Indications, Mains Connec-
tions and Potential Differences”, beginning on page 73).
(12) Test Plug Holder
The test plug with attached plug insert can be reliably secured to
the instrument with the rubberized holder.
(13) Fuses
The two type FF 3.15 A / 600 V fuses protect the instrument
against overload. Phase conductor L and neutral conductor N are
fused individually. If a fuse is defective, and if an attempt is made
to perform a measurement which uses the circuit protected by
this fuse, a corresponding message appears at the display panel.
Attention!
!
Severe damage to the instrument may occur if incorrect
fuses are used.
Only original fuses from GMC-I Messtechnik GmbH as-
sure required protection by means of suitable blowing
characteristics (order no. 3-578-189-01).
Note
The voltage ranges remain functional even if fuses have
blown.
(14) Holders for Test Probes (8)
(15/16) Current Clamp Sockets
Only the current clamp transformers offered as accessories may
be connected to these sockets.
(17) Probe Connector Socket
The probe connector socket is required for the measurement of
probe voltage U
S-PE
, earth electrode voltage U
E
, earthing resis-
tance R
E
and standing surface insulation resistance.
It can be used for the measurement of contact voltage during
RCD testing. The probe is connected with a 4 mm contact pro-
tected plug.
72 GMC-I Messtechnik GmbH
The instrument determines whether or not the probe has been
properly set and displays results at the display panel.
(18) USB Port
The USB port allows for the exchange of data between the test
instrument and a PC.
(19) RS 232 Port
This connection allows for data entry by means of a barcode
scanner or an RFID reader.
(20) Charging Socket
This socket may only be used to connect the Z502R charger for
recharging batteries in the instrument.
(21) Battery Compartment Lid – Replacement Fuses
Attention!
!
When the lid is removed, the instrument must be discon-
nected from the measuring circuit at all poles!
The battery compartment lid covers the Compact Master Battery
Pack (Z502H) or a battery holder with the batteries and the
replacement fuses.
The battery holder or the Z502H battery pack is designed for use
with eight 1.5 V AA batteries in accordance with IEC LR 6 for
power supply to the instrument. When inserting batteries, make
sure that they are poled in accordance with the symbols.
Attention!
!
Make sure that all of the batteries are inserted with cor-
rect polarity. If just one battery is inserted with reversed
polarity, it will not be recognized by the instrument and
may result in leakage from the batteries.
Two replacement fuses are located beneath the battery compart-
ment lid.
Control Panel – LEDs
MAINS/NETZ LED
This LED is only functional when the instrument is switched on. It
has no function in voltage ranges U
L-N
and U
L-PE
.
It lights up green, red or orange, or blinks green or red depending
upon how the instrument has been connected and the selected
function (see also section 18, “LED Indications, Mains Connec-
tions and Potential Differences”, beginning on page 73).
This LED also lights up if line voltage is present during measure-
ment of R
ISO
and R
LO
.
U
L
/R
L
LED
This LED lights up red if contact voltage is greater than 25 V or
50 V during RCD testing, as well as after safety shut-down
occurs. It also lights up if R
ISO
or R
LO
limit values have been
exceeded or fallen short of.
RCD • FI LED
This LED lights up red if the RCCB is not tripped within 400 ms
(1000 ms for type RCD S selective RCDs) during the tripping test
with nominal residual current. It also lights up if the RCCB is not
tripped before nominal residual current has been reached during
measurement with rising residual current.
GMC-I Messtechnik GmbH 73
18 LED Indications, Mains Connections and Potential Differences
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
LED Indications
NETZ/
MAINS
Lights up
green
X
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
U, Z
ST
, kWh, IMD,
int. ramp, RCM
Correct connection, measurement enabled
NETZ/
MAINS
Blinks
green
X
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
U, Z
ST
, kWh, IMD,
int. ramp, RCM
N conductor not connected,
measurement enabled
NETZ/
MAINS
Lights up
orange
X
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
Line voltage of 65 V to 253 V to PE, 2 different phases active (no N con-
ductor at mains), measurement enabled
NETZ/
MAINS
Blinks red
XX
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
U, Z
ST
, kWh, IMD,
int. ramp, RCM
1) No line voltage or
2) PE interrupted
NETZ/
MAINS
Lights up
red
XR
ISO
/ R
LO
Interference voltage detected, measurement disabled
NETZ/
MAINS
Blinks Yel-
low
X
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
L and N are connected to the phase conductors.
U
L
/R
L
Lights up
red
XX
I
N
R
ISO
/ R
LO
– Contact voltage U
IN
and U
I
>25V respectively >50V
– Safety shut-down has occurred
– Limit value exceeded or fallen short of for R
ISO
/ R
LO
function
FI/RCD
Lights up
red
XX
I
N
/ I
F
int. ramp
The RCCB was not tripped, or was tripped too late during the tripping
test.
Mains Connection Test — Single-Phase System — LCD Connection Pictographs
is dis-
played
All except for U No connection detected
is dis-
played
All except for U Connection OK
is dis-
played
All except for U L and N reversed, neutral conductor charged with phase voltage
is dis-
played
All except for U and RE
No mains connection
RE Standard display without connection messages
is dis-
played
All except for U Neutral conductor interrupted
is dis-
played
All except for U
Protective conductor PE interrupted,
neutral conductor N and/or phase conductor L charged with phase volt-
age
is dis-
played
All except for U
Phase conductor L interrupted,
neutral conductor N charged with phase voltage
is dis-
played
All except for U Phase conductor L and protective conductor PE reversed
is dis-
played
All except for U
Phase conductor L and protective conductor PE reversed
Neutral conductor interrupted (with probe only)
is dis-
played
All except for U L and N are connected to the phase conductors.
?
?
?
N
PE
L
N
PE
L
N
PE
L
N
PE
L
x
N
PE
L
x
N
PE
L
x
N
PE
L
N
PE
L
x
N
PE
L
74 GMC-I Messtechnik GmbH
Mains Connection Test — 3-Phase System — LCD Connection Pictographs
is dis-
played
U
(3-phase measurement)
Clockwise rotation
is dis-
played
U
(3-phase measurement)
Counter-clockwise rotation
is dis-
played
U
(3-phase measurement)
Short between L1 and L2
is dis-
played
U
(3-phase measurement)
Short between L1 and L3
is dis-
played
U
(3-phase measurement)
Short between L2 and L3
is dis-
played
U
(3-phase measurement)
Conductor L1 missing
is dis-
played
U
(3-phase measurement)
Conductor L2 missing
is dis-
played
U
(3-phase measurement)
Conductor L3 missing
is dis-
played
U
(3-phase measurement)
Conductor L1 to N
is dis-
played
U
(3-phase measurement)
Conductor L2 to N
is dis-
played
U
(3-phase measurement)
Conductor L3 to N
Connection Test — Earthing resistance (battery operation)
is dis-
played
RE Standard display without connection messages
is dis-
played
PRO-RE RE
Interference voltage at probe S > 3 V
Restricted measuring accuracy
is dis-
played
Messza
nge
RE
Interference current/measuring current ratio > 50 at RE(sel), 1000 at RE(2Z)
Restricted measuring accuracy
at RE(sel): Interference current > 0,85 A
or Interference current/measuring current ratio > 100
➭ no measured value, display RE.Z – – –
is dis-
played
PRO-RE RE
Probe H not connected or RE.H > 150 k
➭ no measurment, display RE – – –
RE.H > 50 k or
RE.H / RE > 10000
➭ Measured value is displayed, restricted measuring accuracy
is dis-
played
PRO-RE RE
Probe S not connected
or RE.S > 150 k
or RE.S x RE.H > 25 M²
➭ no measurment, display RE – – –
RE.S > 50 k or
RE.S / RE > 300
➭ Measured value is displayed, restricted measuring accuracy
is dis-
played
PRO-RE RE
Probe E not connected or RE.E > 150 kRE.E/RE > 2000
➭ no measurment, display RE – – –
RE.E/RE > 300
➭ Measured value is displayed, restricted measuring accuracy
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
N
PE
L
GMC-I Messtechnik GmbH 75
Battery Test
is dis-
played
All
Rechargeable batteries must be recharged, or replaced towards the end
of their service life (U < 8 V).
PE test by means of finger contact at the contact surfaces on the test plug
LCD LEDs
is displayed
U
L
/R
L
FI/RCD
light up
red
XX
U
(single-phase
measurement)
Potential difference 50 V between finger contact and PE (earth contact)
Frequency f 50 Hz
is displayed
U
L
/R
L
FI/RCD
light up
red
XX
U
(single-phase
measurement)
If L is correctly contacted and PE is interrupted (Frequency f 50 Hz)
Error Messages — LCD Pictographs
XX
All measurements
with protective
conductor
Potential difference U
L
between finger contact and PE (earth contact)
(Frequency f 50 Hz)
Remedy: inspect PE connection
Note: only when appears: measurement can nevertheless be
started by pressing the start key again.
XX
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
1) Voltage too high (U > 253 V) for RCD test with direct current
2) U always U > 550 V with 500 mA
3) U > 440 V for I
N
/ I
F
4) U > 253 V for I
N
/ I
F
with 500 mA
5) U > 253 V for measurement with probe
XX I
N
RCD is tripped too early, or is defective.
Remedy: test circuit for bias current
XX Z
L-PE
RCD is tripped too early, or is defective.
Remedy: Test with “DC + positive half-wave”.
XX I
N
/ I
F
RCD tripped during contact voltage measurement.
Remedy: Check selected nominal test current.
EXTRA PRCD
PRCD has tripped.
Cause: poor contact or defective PRCD
X X All except for U
Externally accessible fuse is blown.
The voltage ranges remain functional even if fuses have blown.
Special case, R
LO
: Interference voltage during measurement may result in a
blown fuse.
Remedy: Replace fuse (replacement fuses in battery compartment).
Observe notes regarding fuse replacement in section 20.3!
XX
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
Frequency out of permissible range
Remedy: inspect mains connection
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
PE
PE
76 GMC-I Messtechnik GmbH
All
Excessive temperature inside the test instrument
Remedy: wait for test instrument to cool down
XX R
ISO
/ R
LO
Interference voltage
Remedy: device under test must be disconnected from all sources of voltage
PRO-RE RE (bat)
Interference voltage > 20 V at the probes:
H to E or S to E
no measurement possible
X
PRO-RE
RE (bat) Probe ES not connected or connected wrong.
PRO-RE/
2
RE (bat) Generator current clamp (E-Clip-2) not connected
XX
All measurements
with probe
Interference voltage at the probe
XX R
ISO
/ R
LO
Overvoltage or overloading of the measuring voltage generator during
measurement of R
ISO
or R
LO
XX
I
N
/ I
F
Z
L-N
/ Z
L-PE
Z
ST
, R
ST
, R
E
Meter start-up
No mains connection
Remedy: inspect mains connection
XX All
Defective hardware
Remedy:
1) Switch on and off.
or
2) Briefly remove the batteries.
If error message persists, send instrument to GMC-I Service GmbH.
XX R
LO
OFFSET measurement is not sensible.
Remedy: Check system.
OFFSET measurement of RLO+ and RLO– is still possible.
XR
LO
R
OFFSET
> 10 :
OFFSET measurement is not sensible.
Remedy: Check system.
XEXTRA U
Z > 10 :
OFFSET measurement is not sensible.
Remedy: Check system.
XEXTRA U
U
OFFSET
> U:
Offset value is larger than the measured value at the consuming system.
OFFSET measurement is not sensible.
Remedy: Check system.
XXR
ISO
/ R
LO
/ R
E(bat)
Contact problem or blown fuse
Remedy: Check test plug or measuring adapter for correct seating in the
test plug, or replace the fuse.
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
GMC-I Messtechnik GmbH 77
XR
E
The polarity of the 2-pole adapter must be reversed.
XI
N
/ I
F
N and PE are swapped.
XX
I
N
/ I
F
Z
L-N
/ Z
L-PE
/ R
E
1) Mains connection error
Remedy: Inspect mains connection.
or
2) Display in the connection pictograph: PE interrupted (x) or
underlying protective conductor bar interrupted with reference to the
keys at the test plug
Cause: voltage measuring path interrupted
Result: measurement is disabled
Note: only if appears: Measurement can nevertheless be started by
pressing the start key again.
XI
N
/ I
F
Display at the connection pictograph:
Overlying protective conductor bar interrupted with reference to the keys
at the test plug
Cause: current measuring path interrupted
Result: no measured value display
R
E
I
N
/ I
F
Probe is not detected, probe not connected
Remedy: inspect probe connection
R
E
Clamp is not detected:
– Clamp is not connected or
– Current through clamp is too small (partial earth resistance too high) or
– Transformation ratio set incorrectly
Remedy: Check clamp connection and transformation ratio.
Check the batteries in the METRAFLEX P300 and replace
if necessary.
R
E
If you have changed the transformation ratio at the test instrument, a
message appears prompting you to change the setting at the current
clamp sensor as well.
R
E
Voltage too high at clamp input or signal distorted
The transformation ratio parameter selected at the test instrument might
not correspond to the transformation ratio at the current clamp sensor.
Remedy: Check transformation ratio or setup.
All
Battery voltage is less than or equal to 8 V.
Reliable measurement is no longer possible.
Storage of measured values to memory is disabled.
Remedy: Rechargeable batteries must be recharged, or replaced towards
the end of their service life.
I
N
/ I
F
Resistance in N-PE path is too high.
Consequence: Required test current cannot be generated, measurement
is aborted.
Z
L-PE
, R
E
Upon exceeding the specified contact voltage U
L
:
Z
L-PE
and R
E
: request to switch to the 15 mA wave
only R
E
alternatively:
Request to reduce the measuring range (reduce current)
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
I
N
/I
F
10 mA 30 mA 100 mA 300 mA 500 mA
R
MAX
for I
N
510 170 50 15 9
R
MAX
for I
F
410 140 40 12 7
78 GMC-I Messtechnik GmbH
Entry Plausibility Check – Parameters Combination Checking — LCD Pictographs
Parameter out of range
I
N
/ I
F
5 x 500 mA is not possible
I
N
/ I
F
Type B, B+ and EV not possible with G/R, SRCD and PRCD
I
N
180° not possible for G/R, SRCD, PRCD
I
N
/ I
F
DC not possible with G/R, SRCD, PRCD
I
N
/ I
F
Half-wave or DC not possible with type AC, F, B+ and EV
I
N
/ I
F
EXTRA RCM
DC not possible with type A
I
N
1/2 test current not possible with DC
I
N
2 x / 5 x IdN with full-wave only
R
E
Not without probe in IT network!
R
E
Battery powered measurement not possible,
e.g. with 4-pole adapter connected to the test plug,
or for 2-clamp measurement of measurement of soil resistivity
R
E
Mains powered measurement not possible,
e.g. with 2/3-pole adapter connected to the test plug
I
N
/ I
F
DC+ with 10 Ω only
R
E
No DC bias magnetization in the IT network
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
GMC-I Messtechnik GmbH 79
R
E
15 mA only possible in the 1 k and 100 range!
R
E
15 mA only as loop measurement with or without probe
EXTRA RCM With RCM: TYPE AC, F , B, B+ and EV not possible
I
N
/ I
F
No measurement with half-wave or DC in the IT network
All
The parameters you have selected do not make sense in combination
with previously configured parameters. The selected parameter settings
will not be saved.
Remedy: Enter other parameter settings.
R
E
2 pole measurement via earthing contact plug (not possible in IT systems)
EXTRA ta+I The intelligent ramp is not possible with RCD types RCD-S and G/R.
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
80 GMC-I Messtechnik GmbH
Messages — LCD Pictographs — Test sequences
AUTO
The test sequence includes a measurement which cannot be processed
by the connected test instrument. The respective test step must be
skipped. Example: The test sequence includes a RCM measurement
which has been transferred to PROFITEST MTECH.
AUTO The test sequence has been successfully completed.
AUTO
There are no test sequences available.
Cause: They may have been deleted by the following operations: Chang-
ing of language, profile, DB mode or by resetting the test instrument to
default values.
Error Messages — LCD Pictographs — PRO-AB Leakage Current Adapter
EXTRA I
L
Measuring range exceeded
Change into the bigger measuring range (test instrument and leakage
current measuring adapter).
EXTRA I
L
Test measurement:
The test has been passed sucessfully.
The leakage current measuring adapter is now ready for use.
EXTRA I
L
Test measurement:
The test has failed.
The leakage current measuring adapter is defective.
Please consult our repair service.
EXTRA I
L
Test measurement:
Check the fuse in the leakage current measuring adapter.
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
GMC-I Messtechnik GmbH 81
Database and Entry Operations — LCD Pictographs
I
N
/ I
F
Z
L-N
/ Z
L-PE
EXTRA t
A
+I
EXTRA RCM
Saving a measured value with differing electrical circuit parameter
The electrical circuit parameter you have set at the test instrument does
not correspond to the parameter saved in the structure under object data.
Example: The residual operating current defined in the database is 10 mA,
whereas you have performed measurements with 100 mA. If you wish to
perform all future measurements with 100 mA, the value must be modi-
fied in the database by acknowledging it with . The measured value
will be documented and the new parameter will be accepted.
If you wish to leave the parameter in the database unchanged, press key
. Measured value and modified parameter will only be documented.
All Please enter a designation (alphanumeric).
All
Operation with a Barcode Scanner
Error message appears when the “EDIT” entry field is opened and battery
voltage is less than 8 V. Output voltage is generally switched off during
barcode scanner operation if U is less than 8 V in order to assure that
remaining battery capacity is adequate for entering designations for
devices under test and saving the measurement.
Remedy: Rechargeable batteries must be recharged, or replaced towards
the end of their service life.
All
Operation with a Barcode Scanner
Current flowing through the RS 232 port is too high.
Remedy:
The connected device is not suitable for this port.
All
Operation with a Barcode Scanner
Barcode not recognized, incorrect syntax
All
Data cannot be entered at this location within the structure.
Remedy: Observe profile for preselected PC software (see SETUP menu).
All
Measured value cannot be saved at this location within the structure.
Remedy: Make sure that you have selected the right profile for you PC
evaluation program in the SETUP menu (see section 4.6).
All
Memory is full.
Remedy: Save your measurement data to a PC and then clear memory at
test instrument by deleting the database or by importing an empty data-
base.
All
Delete measurement or database.
This prompt window asks you to confirm deletion.
SETUP
Data loss after changing language or profile,
or after restoring default settings.
Back up your measurement data to a PC before pressing the respective
key.
This prompt window asks you to confirm deletion.
All
This error message appears when the database, i. e. the structure cre-
ated in the ETC software, is too large for the device memory.
The database in the device memory is empty after database transfer has
been interrupted.
Remedy: Reduce the database in ETC or send the database without
measured vales (key Send structure) if measured values should already be
available.
Status
Test
plug
Meas.
Adapter
Position of the
Function Switch
Function / Meaning
82 GMC-I Messtechnik GmbH
19 Characteristic Values
Characteristic Values MBASE+ & MTECH+
Func-
tion
Measured
Quantity
Display Range
Reso-
lution
Input
Impedance/
Test Cu rren t
Measuring Range Nominal Values
Measuring
Uncertainty
Intrinsic
Uncertainty
Connections
Plug
Insert
1)
2-Pole
Adapter
3-Pole
Adapter
Probe
Clamps
WZ12C Z3512A
MFLEX
P300
U
U
L-PE
U
N-PE
0 ... 99.9 V 0.1 V
5 M
0.3 ... 600 V
1)
U
N
= 120/230/
400/500 V
f
N
= 16
2
/
3
/50/
60/200/400 Hz
(2% rdg.+5d) (1% rdg.+5d)
lll
100 ... 600 V 1 V (2% rdg.+1d) (1% rdg.+1d)
f
15.0 ... 99.9 Hz
100 ... 999 Hz
0.1 Hz
1 Hz
DC 15,4 ... 420 Hz (0.2% rdg.+1d) (0.1% rdg.+1d)
U
3~
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
0.3 ... 600 V
(3% rdg.+5d)
(3% rdg.+1d)
(2% rdg.+5d)
(2% rdg.+1d)
l
U
PROBE
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
(2% rdg.+5d)
(2% rdg.+1d)
(1% rdg.+5d)
(1% rdg.+1d)
l
U
L-N
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
1)
(3% rdg.+5d)
(3% rdg.+1d)
(2% rdg.+5d)
(2% rdg.+1d)
ll
I
N
I
F
U
IN
0 ... 70.0 V 0.1 V 0.3 · I
N
5 ... 70 V
U
N
=
120 V
230 V
400 V
2)
f
N
= 50/60 Hz
U
L
= 25/50 V
I
N
=
6 mA
10 mA
30 mA
100 mA
300 mA
500 mA
2)
+10% rdg.+1d
+1% rdg.–1d ...
+9% rdg.+1d
ll
l
optio
nal
R
E
10 ... 999
1.00 k
... 6.51 k
1
0.01 k
I
N
= 10 mA · 1,05
calculated value
from
U
IN
/
I
N
3 ... 999
1 k ... 2.17 k
1
0.01 k
I
N
= 30 mA · 1,05
1 ... 651 1
I
N
=100 mA · 1,05
0.3 ... 99.9
100 ... 217
0.1
1
I
N
=300 mA · 1,05
0.2 ... 9.9
10 ... 130
0.1
1
I
N
=500 mA · 1,05
I
F
(I
N
= 6 mA) 1.8 ... 7.8 mA
0,1 mA
1.8 ... 7.8 mA 1.8 ... 7.8 mA
(5% rdg.+1d) (3.5% rdg.+2d)
I
F
(I
N
= 10 mA) 3.0 ... 13.0 mA 3.0 ... 13.0 mA 3.0 ... 13.0 mA
I
F
(I
N
= 30 mA) 9.0 ... 39.0 mA 9.0 ... 39.0 mA 9.0 ... 39.0 mA
I
F
(I
N
= 100 mA) 30 ... 130 mA 1 mA 30 ... 130 mA 30 ... 130 mA
I
F
(I
N
= 300 mA) 90 ... 390 mA 1 mA 90 ... 390 mA 90 ... 390 mA
I
F
(I
N
= 500 mA) 150 ... 650 mA 1 mA 150 ... 650 mA 150 ... 650 mA
U
I
/ U
L
= 25 V 0 ... 25.0 V
0.1 V wie I
0 ... 25.0 V
+10% rdg.+1d
+1% rdg.–1d ...
+9% rdg.+1 d
U
I
/ U
L
= 50 V 0 ... 50.0 V 0 ... 50.0 V
t
A
(I
N
· 1) 0 ... 1000 ms 1 ms 6 ... 500 mA 0 ... 1000 ms
4 ms 3 mst
A
(I
N
· 2) 0 ... 1000 ms
2 · 6 ... 2 · 500 mA
0 ... 1000 ms
t
A
(I
N
· 5) 0 ... 40 ms 1 ms
5 · 6 ... 5 · 300 mA
0 ... 40 ms
Z
L-PE
Z
L-N
Z
L-PE
()
Z
L-N
0 ... 999 m
1.00 ... 9.99
1 m
0.01
0.1
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.15 ... 0.49
0.50 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
400/500 V
1)
f
N
=16
2
/
3
/50/60
Hz
(10% rdg.+ 30d)
(10% rdg.+ 30d)
(5% rdg.+ 3d)
(5% rdg.+30d)
(4% rdg.+30d)
(3% rdg.+3d)
l
l
Z
L-PE
Z
L-PE
+ DC
0 ... 999 m
1.00 ... 9.99
10.0 ... 29.9
0.25 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
f
N
= 50/60 Hz
(18% rdg.+30d)
(10% rdg.+3d)
(6% rdg.+50d)
(4% rdg.+3d)
I
K
(Z
L-PE
,
Z
L-PE
+ DC)
0 ... 9.9 A
10 ... 999 A
1.00 ... 9.99 kA
10.0 ... 50.0 kA
0,1 A
1 A
10 A
100 A
120 (108 ... 132) V
230 (196 ... 253) V
400 (340 ... 440) V
500 (450 ... 550) V
calculated value from Z
L-PE
Z
L-PE
(15 mA)
0.5 ... 9.99 0.01 only display range
10.0 ... 99.9
100 ... 999
0.1
1
15 mA AC
10 ... 100
100 ... 1000
U
N
= 120/230 V
f
N
=
16
2
/
3
/50/
60
Hz
(10% v.M.+10D)
(8% v.M.+2D)
(2% v.M.+2D)
(1% v.M.+1D)
I
K
(15 mA)
100 ... 999 mA
0.00 ... 9.99 A
10.0 ... 99.9 A
1 mA
0.01 A
0.1 A
calcul. value depends
on U
N
and Z
L-PE
:
I
K
=U
N
/10...1000
calculated value from Z
L-PE
(15 mA):
I
K
= U
N
/Z
L-PE
(15 mA)
R
E
R
E
(with probe)
[R
E
(without probe)
values as Z
L-PE
]
0 ... 999 m
1.00 ... 9.99
10.0 ... 99.9
100 ... 999
1 k ...9.99 k
1 m
0,01
0,1
1
0.01 k
1.3 ... 3.7 A AC
1.3 ... 3.7 A AC
1.3 ... 3.7 A AC
400 mA AC
40 mA AC
4 mA AC
0.15 ... 0.49
0.50 ... 0.99
1.0 ...9.99
10 ...99.9
100 ...999
1 k ...9.99 k
U
N
= 120/230 V
U
N
= 400 V
1)
f
N
= 50/60 Hz
(10% rdg.+30d)
(10% rdg.+30d)
(5% rdg.+3d)
(10% rdg.+3d)
(10% rdg.+3d)
(10% rdg.+3d)
(5% rdg.+30d)
(4% rdg.+30d)
(3% rdg.+3d)
(3% rdg.+3d)
(3% rdg.+3d)
(3% rdg.+3d)
ll l
R
E
DC+
0 ... 999 m
1.00 ... 9.99
10.0 ... 29.9
1 m
0.01
0.1
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.25 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
f
N
= 50/60 Hz
(18% rdg.+ 30d)
(10% rdg. + 3d)
(6% rdg.+50D)
(4% v.M.+3D)
U
E
0 ... 253 V 1 V — calculated value
R
E
Sel
clip
R
E
0 ... 999
1 m...
1
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.25 ... 300 
5)
see R
E
(20% rdg.+ 20 D)
(15% rgd.+ 20 d)
l
l
R
E
DC+ 0 ... 999
1 m...
1
U
N
= 120/230 V
f
N
= 50/60 Hz
(22% v.M.+20 D)
(15% rdg.+ 20 d)
EX-
TRA
Z
ST
0 ... 30 M 1 k2.3 mA at 230 V
10 k ... 199 k
200 k ... 30 M
U
0
= U
L-N
(20% rdg.+2d)
(10% rdg.+2d)
(10% rdg.+3d)
(5% rdg.+3d)
llll
R
INS
R
INS
. R
E INS
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 49.9 M
1 k
10 k
100 k
I
K
= 1.5 mA 50 k... 500 M
U
N
= 50 V
I
N
= 1 mA
krange
(5% rdg.+10d)
Mrange
(5% rdg.+1d)
krange
(3% rdg.+10d)
Mrange
(3% rdg.+1d)
ll
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
1 k
10 k
100 k
U
N
= 100 V
I
N
= 1 mA
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
100 ... 200 M
1 k
10 k
100 k
1 M
U
N
= 250 V
I
N
= 1 mA
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
100 ... 500 M
1 k
10 k
100 k
1 M
U
N
= 500 V/
1000 V
I
N
= 1 mA
U
10 ... 999 V–
1.00 ... 1.19 kV
1 V
10 V
10 ... 1.19 kV (3% rdg.+1d)
(1.5% rdg.+1d)
R
LO
R
LO
0.01 ... 9.99
10.0 ... 99.9
10 m
100 m
I
m
200 mA
I
m
< 200 mA
0.1 ... 5.99
6.0 ... 100
U
0
= 4.5 V (4% rdg.+2d) (2% rdg.+2d)
l
GMC-I Messtechnik GmbH 83
1)
U > 253 V, with 2 or 3-pole adapter only
2)
1
·
/ 2
·
IN > 300 mA and 5
·
IN > 500 mA and If > 300 mA only up to U
N
230 V !
IN 5
·
300 mA only with U
N
= 230 V
3)
The transformation ratio selected at the clamp (1 ... 1000 mV/A) must be set in the
“Type” menu with the rotary switch in the “SENSOR” position.
4)
at R
Eselektiv
/R
Egesamt
< 100
Key: D = digits, rdg. = measured value (reading)
SEN-
SOR
I
L/Amp
0 ... 99.9 mA 0.1 mA
5 ... 1000 mA
3)
(10% rdg.+8d) (4% rdg.+7d)
l
100 ... 999 mA 1 mA (10% rdg.+3d) (4% rdg.+2d)
0 ... 99.9 A 0.1 A
5 ... 150 A
3)
(8% rdg.+2d) (3% rdg.+2d)
100 ... 150 A 1 A (8% rdg.+1d) (3% rdg.+1d)
0 ... 99.9 mA 0.1 mA
5 ... 1000 mA
3)
0.05 ... 10 A
3)
0.5 ... 100 A
3)
5 ... 1000 A
3)
(7% rdg.+8d) (4% rdg.+7d)
l
100 ... 999 mA 1 mA (5% rdg.+3d) (2% rdg.+2d)
1.0 ... 9.99 A 0.01 A (4% rdg.+2d) (2% rdg.+2d)
10.0 ... 99.9 A 0.1 A (4% rdg.+2d) (2% rdg.+2d)
100 ... 999 A 1 A (4% rdg.+1d) (2% rdg.+1d)
1.00 ... 1.02 kA 0.01 kA (4% rdg.+1d) (2% rdg.+1d)
0 ... 99.9 mA 0.1 mA
1 V/A 30 ... 1000 mA
3)
U
N
= 120/230/
400 V
f
N
= 50/60 Hz
(7%
rdg.
+100d)
(4%
rdg.
+100d)
l
100 ... 999 mA 1 mA (6% rdg.+12d) (3% rdg.+12d)
1.0 ... 9.99 A 0.01 A 100 mV/A 0,3 ... 10 A
3)
(6% rdg.+12d) (3% rdg.+12d)
10.0 ... 99.9 A 0.1 A 10 mV/A 3 ... 100 A
3)
(5% rdg.+11d) (2% rdg.+11d)
Uez
0.0 ... 99.0 mV 0.1 mV
400 k 1000 mV
(3% v.M.+2D) (2% v.M.+2D)
100 ... 999 mV 1 mV (3% v.M.+1D) (2% v.M.+1D)
Func-
tion
Measured
Quantity
Display Range
Reso-
lution
Input
Impedance/
Test Cur rent
Measuring Range Nominal Values
Measuring
Uncertainty
Intrinsic
Uncertainty
Connections
Plug
Insert
1)
2-Pole
Adapter
3-Pole
Adapter
Probe
Clamps
WZ12C Z3512A
MFLEX
P300
84 GMC-I Messtechnik GmbH
Characteristic Values MPRO, MXTRA & SECULIFE IP
Func-
tion
Measured
Quantity
Display Range
Reso-
lution
Input
Impedance /
Test Cu rrent
Measuring
Range
Nominal
Values
Measuring
Uncertainty
Intrinsic
Uncertainty
Connections
Plug
Insert
1
2-Pole
Adapter
3-Pole
Adapter
Probe
Clamp
WZ12C Z3512A
MFLEX
P300
U
U
L-PE
U
N-PE
0 ... 99.9 V 0.1 V
5 M
0.3 ... 600 V
1
U
N
=
120 V
230 V
400 V
500 V
f
N
= 16
2
/
3
/50/
60/200/400 Hz
(2% rdg.+5d) (1% rdg.+5d)
●●●
100 ... 600 V 1 V (2% rdg. + 1 d) (1% rdg. + 1 d)
f
15.0 ... 99.9 Hz
100 ... 999 Hz
0.1 Hz
1 Hz
DC 15.4 ... 420 Hz
(0.2% rdg. + 1
d)
(0.1% rdg. + 1 d)
U
3~
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
0.3 ... 600 V
(3% rdg.+5d)
(3% rdg. + 1 d)
(2% rdg.+5d)
(2% rdg. + 1 d)
●
U
Probe
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
(2% rdg.+5d)
(2% rdg. + 1 d)
(1% rdg.+5d)
(1% rdg.+1d)
●
U
L-N
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
1
(3% rdg.+5d)
(3% rdg. + 1 d)
(2% rdg.+5d)
(2% rdg. + 1 d)
●●
I
N
I
F
U
IN
0 ... 70.0 V 0.1 V 0.3 · I
N
5 ... 70 V
U
N
=
120 V
230 V
400 V
f
N
= 50/60 Hz
U
L
= 25/50 V
I
N
=
6 mA
10 mA
30 mA
100 mA
300 mA
500 mA
2
U
N
230 V
+10% rdg. + 1 d
+1% rdg. –1d
+9% rdg. + 1 d
●●
●
Option
R
E
10 ... 999
1.00 k ... 6.51 k
1
0.01 k
I
N
= 10 mA · 1.05
calculated value
Off
R
E
= U
IN
/
I
N
3 ... 999
1 k ... 2.17 k
1
0.01 k
I
N
= 30 mA · 1.05
1 ... 651 1
I
N
=100 mA · 1.05
0.3 ... 99.9
100 ... 217
0.1
1
I
N
=300 mA · 1.05
0.2 ... 9.9
10 ... 130
0.1
1
I
N
=500 mA · 1.05
I
F
(I
N
= 6 mA) 1.8 ... 7.8 mA
0,1 mA
1.8 ... 7.8 mA 1.8 ... 7.8 mA
I
F
(I
N
= 10 mA) 3.0 ... 13.0 mA 3.0 ... 13.0 mA 3.0 ... 13.0 mA
(5% rdg. + 1 d)
(3.5% rdg. + 2
d)
I
F
(I
N
= 30 mA) 9.0 ... 39.0 mA 9.0 ... 39.0 mA 9.0 ... 39.0 mA
I
F
(I
N
= 100 mA) 30 ... 130 mA 1 mA 30 ... 130 mA 30 ... 130 mA
I
F
(I
N
= 300 mA) 90 ... 390 mA 1 mA 90 ... 390 mA 90 ... 390 mA
I
F
(I
N
= 500 mA) 150 ... 650 mA 1 mA 150 ... 650 mA 150 ... 650 mA
U
I
/ U
L
= 25 V 0 ... 25.0 V
0.1 V Same as I
0 ... 25.0 V
+10% rdg. + 1 d
+1% rdg. –1d
+9% rdg.+ 1d
U
I
/ U
L
= 50 V 0 ... 50.0 V 0 ... 50.0 V
t
A
(I
N
· 1) 0 ... 1000 ms 1 ms 6 ... 500 mA 0 ... 1000 ms
U
N
230 V
4 ms 3 mst
A
(I
N
· 2) 0 ... 1000 ms 1 ms
2 · 6 ... 2 · 500 mA
0 ... 1000 ms
t
A
(I
N
· 5) 0 ... 40 ms 1 ms
5 · 6 ... 5 · 300 mA
0 ... 40 ms
Z
L-PE
Z
L-N
Z
L-PE
()
Z
L-N
0 ... 999 m
1.00 ... 9.99
1 m
0.01
0.1
3.7 ... 4.7 A AC
0.10 ... 0.49
0.50 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
400/500 V
1)
f
N
=16
2
/
3
/50/60 Hz
(10% rdg.+20d)
(10% rdg.+20d)
(5% rdg.+3d)
(5% rdg.+
20d
)
(4% rdg.+
20d
)
(3% rdg.+3d)
●
●
Z
L-P E
Z
L-PE
+ DC
0 ... 999 m
1.00 ... 9.99
10.0 ... 29.9
3.7 ... 4.7 A AC
0.5/1.25 A DC
0.25 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
f
N
= 50/60 Hz
(18% rdg.+30d)
(10% rdg.+3d)
(6% rdg.+50d)
(4% rdg.+3d)
I
K
(Z
L-PE
,
Z
L-PE
+ DC)
0 ... 9.9 A
10 ... 999 A
1.00 ... 9.99 kA
10.0 ... 50.0 kA
0,1 A
1 A
10 A
100 A
120 (108 ... 132) V
230 (196 ... 253) V
400 (340 ... 440) V
500 (450 ... 550) V
Value calculated from Z
L-PE
Z
L-PE
(15 mA)
0.5 ... 99.9
100 ... 999
0.1
1
15 mA AC
10 ... 100
100 ... 1000
U
N
= 120/230 V
f
N
= 16
2
/
3
/50/
60 Hz
(10% rdg.+10d)
(8% rdg. + 2 d)
(2% rdg. + 2 d)
(1% rdg. + 1 d)
I
K
(15 mA)
0.10 ... 9.99 A
10.0 ... 99.9 A
100 ... 999 A
14)
0.01 A
0.1 A
1 A
100 mA ... 12 A
(U
N
= 120 V)
200 mA ... 25 A
(U
N
= 230 V)
Value calculated from
I
K
= U
N
/Z
L-PE
(15 mA)
R
E
R
E.sl
(without
probe)
R
E
(with probe)
0 ... 999 m
1.00 ... 9.99
10.0 ... 99.9
100 ... 999
1 k ...9.99 k
1 m
0.01
0.1
1
0.01 k
3.7 ... 4.7 A AC
3.7 ... 4.7 A AC
400 mA AC
40 mA AC
4 mA AC
0.10 ... 0.49
0.50 ... 0.99
1.0 ...9.99
10 ...99.9
100 ...999
1 k ... 9.99 k
U
N
same as U
function
1
f
N
= 50/60 Hz
(10% rdg.+20d)
(10% rdg.+20d)
(5% rdg.+3d)
(10% rdg.+3d)
(10% rdg.+3d)
(10% rdg.+3d)
(5% rdg.+
20d
)
(4% rdg.+
20d
)
(3% rdg.+3d)
(3% rdg.+3d)
(3% rdg.+3d)
(3% rdg.+3d)
●● ●
R
E (15 mA)
(without/with
probe)
0.5 ... 99.9
100 ... 999
0.1
1
15 mA AC
10 ...99.9
100 ...999
U
N
= 120/230 V
f
N
= 50/60 Hz
(10% rdg.+10d)
(8% rdg. + 2 d)
(2% rdg. + 2 d)
(1% rdg. + 1 d)
R
E.sl
(without
probe) +
DC
R
E.sl
(with probe)
+ DC
0 ... 999 m
1.00 ... 9.99
10.0 ... 29.9
1 m
0.01
0.1
3.7 ... 4.7 A AC
0.5/1.25 A DC
0.25 ... 0.99
1.00 ... 9.99
U
N
= 120/230 V
f
N
= 50/60 Hz
(18% rdg.+30d)
(10% rdg.+3d)
(6% rdg.+50d)
(4% rdg.+3d)
U
E
0 ... 253 V 1 V 3.7 ... 4.7 A AC
R
E
= 0.10 ... 9.99
U
N
= 120/230 V
f
N
= 50/60 Hz
Calculated U
E
= U
N
· R
E
/R
E.sl
R
E
Sel
Clamp
R
E.sel
(only with probe)
0 ... 999 m
1.00 ... 9.99
10.0 ... 99.9
100 ... 999
1 m
0.01
0.1
1

2.1 A AC
2.1 A AC
400 mA AC
40 mA AC
0.25 ... 300 
4
U
N
= 120/230 V
f
N
= 50/60 Hz
(20% rdg.+20 d)
(15% rdg.+20 d)
●
●
R
E.sel
+ DC
(only with probe)
0 ... 999 m
1.00 ... 9.99
10.0 ... 99.9
100 ... 999
1 m
0.01
0.1
1

3.7 ... 4.7 A AC
0.5/1.25 A DC
0.25 ... 300 
R
E.tot
< 10 
4
U
N
= 120/230 V
f
N
= 50/60 Hz
(22% rdg.+20 d)
(15% rdg.+20 d)
EXTRA
Z
ST
0 to 30 M 1 k 2.3 mA at 230 V
10 k ... 199 k
200 k ... 30 M
U
0
= U
L-N
(20% rdg. + 2 d)
(10% rdg. + 2 d)
(10% rdg.+3d)
(5% rdg.+3d)
●●●●
IMD test
20 ... 648 k
2.51 M
1 k
0.01 M
IT line voltage
U.it = 90 ... 550 V
20 k... 199 k
200 k ... 648 k
2.51 M
IT system nomi-
nal voltages
UN.it =
120/230/400/
500 V
f
N
= 50/60 Hz
±7%
±12%
±3%
±5%
±10%
±2%
●●
GMC-I Messtechnik GmbH 85
1)
U > 230 V with 2 or 3-pole adapter only
2
1
·
/ 2
·
IN > 300 mA and 5
·
IN > 500 mA and If > 300 mA only up to U
N
230 V !
3
The transformation ratio selected at the clamp (1 ... 1000 mV/A) must be set in the “Type” menu with the rotary switch in the “SENSOR” position.
4
Where R
Eselective
/R
Etotal
< 100
Special Function MPRO, MXTRA
5
Signal frequency without interference signal
6
PRO-RE (Z501S) adapter cable for test plug, for connecting earth probes (E-Set 3/4)
7
PRO-RE/2 (Z502T) adapter cable for test plug, for connecting the generator clamp
(E-CLIP2)
8
Generator clamp: E-CLIP2 (Z591B)
9
Clamp meter: Z3512A (Z225A)
10
Where RE.sel/RE < 10 or clamp current > 500 µA
11
Where RE.H/RE 100 and RE.E/RE 100
12
Where d = 20 m
13
Where d = 2 m
14
Where Z
L-PE
< 0.5 , I
k
> U
N
/0.5 is indicated
15
)Only where RANGE = 20 k
16
Only where RANGE = 50 k or AUTO
Key: D = digits, rdg. = measured value (reading)
R
ISO
R
ISO
, R
E ISO
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 49.9 M
1 k
10 k
100 k
I
K
= 1.5 mA 50 k... 500 M
U
N
= 50 V
I
N
= 1 mA
k range
±(5% v.M.+10D)
Mrange
(5% rdg. + 1 d)
k
range
(3% rdg.+10d)
M
range
(3% rdg. + 1 d)
●●
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
1 k
10 k
100 k
U
N
= 100 V
I
N
= 1 mA
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
100 ... 200 M
1 k
10 k
100 k
1 M
U
N
= 250 V
I
N
= 1 mA
1 ... 999 k
1.00 ... 9.99 M
10.0 ... 99.9 M
100 ... 500 M
1 k
10 k
100 k
1 M
U
N
= 500 V
U
N
= 1000 V
I
N
= 1 mA
U
10 ... 999 V–
1.00 ... 1.19 kV
1 V
10 V
10 ... 1.19 kV (3% rdg. + 1 d)
(1.5% rdg. + 1 d)
R
LO
R
LO
0.01 ... 9.99
10.0 ... 199.9
10 m
100 m
I
m
200 mA
I
m
< 200 mA
0.1 ... 5.99
6.0 ... 100
U
0
= 4.5 V (4% rdg. + 2 d) (2% rdg. + 2 d)
●
SEN-
SOR
I
L/Amp
0 ... 99.9 mA 0.1 mA
5 ... 1000 mA
3
(10% rdg.+8d) (4% rdg.+7d)
●
100 ... 999 mA 1 mA (10% rdg.+3d) (4% rdg. + 2 d)
0 ... 99.9 A 0.1 A
5 ... 150 A
3
(8% rdg. + 2 d) (3% rdg. + 2 d)
100 ... 150 A 1 A (8% rdg. + 1 d) (3% rdg. + 1 d)
0 ... 99.9 mA 0.1 mA
5 ... 1000 mA
3
0.05 ... 10 A
3
0.5 ... 100 A
3
5 ... 1000 A
3
(7% rdg.+8d) (4% rdg.+7d)
●
100 ... 999 mA 1 mA (5% rdg.+3d) (2% rdg. + 2 d)
1.0 ... 9.99 A 0.01 A (4% rdg. + 2 d) (2% rdg. + 2 d)
10.0 ... 99.9 A 0.1 A (4% rdg. + 2 d) (2% rdg. + 2 d)
100 ... 999 A 1 A (4% rdg. + 1 d) (2% rdg. + 1 d)
1.00 ... 1.02 kA 0.01 kA (4% rdg. + 1 d) (2% rdg. + 1 d)
0 ... 99.9 mA 0.1 mA
1 V/A 30 ... 1000 mA
3
U
N
= 120/230/
400 V
f
N
= 50/60 Hz
(7% rdg.+100d)
(4% rdg.+100d)
●
100 ... 999 mA 1 mA (6% rdg.+12d) (3% rdg.+12d)
1.0 ... 9.99 A 0.01 A 100 mV/A 0.3 ... 10 A
3
(6% rdg.+12d) (3% rdg.+12d)
10.0 ... 99.9 A 0.1 A 10 mV/A 3 ... 100 A
3
(5% rdg.+11d) (2% rdg.+11d)
Uez
0.0 ... 99.0 mV 0.1 mV
400 k 1000 mV
(3% rdg. + 2 d) (2% rdg. + 2 d)
100 ... 999 mV 1 mV (3% rdg. + 1 d) (2% rdg. + 1 d)
Func-
tion
Measured
Quantity
Display Range
Reso-
lution
Input
Impedance /
Test Cu rrent
Measuring
Range
Nominal
Values
Measuring
Uncertainty
Intrinsic
Uncertainty
Connections
Plug
Insert
1
2-Pole
Adapter
3-Pole
Adapter
Probe
Clamp
WZ12C Z3512A
MFLEX
P300
Func-
tion
Measured
Quantity
Display Range
Reso-
lution
Test Current/
Signal
Frequen
cy
5
Measuring Range
Measuring
Uncertainty
Intrinsic
Uncertainty
Connections
Adapter for Test Plug
Current Clamps
PRO-RE PRO-RE/2 Z3512A Z591B
RE
BAT
RE, 3-pole
0.00 ... 9.99
10.0 ... 99.9
100 ... 999
1.00 ... 9.99 k
10.0 ... 50.0 k
0.01
0.1
1
0.01 k
0.1 k
16 mA/128 Hz
1.6 mA/128 Hz
0.16 mA/128 Hz
0.16 mA/128 Hz
0.16 mA/128 Hz
1.00 ... 19.9
5.0 ... 199
50 ... 1.99 k
0.50k ... 19.9k
0.50k ... 49.9k
(10% v.M.+10D)
+ 1
(3% v.M.+5D)
+ 0,5
6
RE, 4-pole (10% rdg.+10d) (3% rdg.+5d)
RE, 4-pole
Selective
With clamp meter
0.00 ... 9.99
10.0 ... 99.9
100 ... 999
1.00 ... 9.99 k
10.0 ... 19.9 k
15
10.0 ... 49.9 k
16
0.01
0.1
1
0.01 k
0.1 k
0.1 k
16 mA/128 Hz
16 mA/128 Hz
1.6 mA/128 Hz
0.16 mA/128 Hz
0.16 mA/128 Hz
0.16mA/128 Hz
1.00 ... 9.99
10.0 ... 200
(15% rdg.+10d)
(20% rdg.+10d)
10
(10% rdg.+10d)
(15% rdg.+10d)
69
Soil resistivity
(p)
0.0 ... 9.9 m
100 ... 999 m
1.00 ... 9.99 km
0.1 m
1 m
0.01 k
m
16 mA/128 Hz
1.6 mA/128 Hz
0.16 mA/128 Hz
0.16 mA/128 Hz
0.16mA/128 Hz
100 m ... 9.99 km
12
500 m ... 9.99 km
12
5.00 km ... 9.99 km
13
5.00 km ... 9.99 km
13
5.00 km ... 9.99 km
13
(20% rdg.+10d)
11
(12% rdg.+10d)
11
6
Probe distance
d (p)
0.1 ... 999 m
RE, 2 clamps
0.00 ... 9.99
10.0 ... 99.9
100 ... 999
1.00 ... 1.99 k
0.01
0.1
1
0.01 k
30 V / 128 Hz
0.10 ... 9.99
10.0 ... 99.9
(10% rdg.+5d)
(20% rdg.+5d)
(5% rdg.+5d)
(12% rdg.+5d)
798
86 GMC-I Messtechnik GmbH
Characteristic Values PROFITEST MASTER & SECULIFE IP
Reference Conditions
Line voltage 230 V 0.1%
Line frequency 50 Hz 0.1%
Meas. quantity frequency 45 Hz 65 Hz
Measured qty. waveform Sine (deviation between effective
and rectified value 0.1%)
Line impedance angle cos =1
Probe resistance 10
Supply power 12 V 0.5 V
Ambient temperature + 23 C 2 K
Relative humidity 40% 60%
Finger contact For testing potential difference
to ground potential
Standing surface insulation
Purely ohmic
Nominal Ranges of Use
Voltage U
N
120 V (108 ... 132 V)
230 V (196 ... 253 V)
400 V (340 ... 440 V)
Frequency f
N
16
2
/
3
Hz (15.4 ... 18 Hz)
50 Hz (49.5 ... 50.5 Hz)
60 Hz (59.4 ... 60.6 Hz)
200 Hz (190 ... 210 Hz)
400 Hz (380 ... 420 Hz)
Overall voltage range U
Y
65 ... 550 V
Overall frequency range 15.4 ... 420 Hz
Waveform Sine
Temperature range 0 C ... + 40 C
Supply voltage 8 ... 12 V
Line impedance angle Corresponds to cos = 1 ... 0.95
Probe resistance < 50 k
Power Supply
Rechargeable batteries 8 each AA 1.5 V,
we recommend eneloop type AA HR6,
2000 mAh (article no. Z502H)
Number of measurements (standard setup with illumination)
– For R
ISO
1 measurement – 25 s pause:
approx. 1100 measurements
– For R
LO
Automatic polarity reversal / 1 
(1 measuring cycle) – 25 s pause:
approx. 1000 measurements
Battery test Symbolic display of battery voltage
Battery saver circuit Display illumination can be switched off.
The test instrument is switched off
automatically after the last key opera-
tion. The user can select the desired
on-time.
Safety shutdown If supply voltage is too low, the instru-
ment is switched off, or cannot be
switched on.
Recharging socket Installed rechargeable batteries can be
recharged directly by connecting a
charger to the recharging socket: char-
ger for Z502R
Charging time Approx. 2 hours *
* Maximum charging time with fully depleted rechargeable batteries.
A timer in the charger limits charging time to no more than 4 hours.
Overload Capacity
R
ISO
1200 V continuous
U
L-PE
, U
L-N
600 V continuous
RCD, R
E
, R
F
440 V continuous
Z
L-PE
, Z
L-N
550 V (Limits the number of measure-
ments and pause duration. If overload
occurs, the instrument is switched off
by means of a thermostatic switch.)
R
LO
Electronic protection prevents switching
on if interference voltage is present.
Fine-wire fuse protection
FF 3.15 A 10 s,
Fuses blow at > 5 A
Electrical Safety
Protection class II per IEC 61010-1/EN 61010-1/
VDE 0411-1
Nominal voltage 230/400 V (300/500 V)
Test voltage 3.7 kV 50 Hz
Measuring category CAT III 500 V or CAT IV 300 V
Pollution degree 2
Fusing, L and N terminals
1 cartridge fuse-link ea.
FF 3.15/500G 6.3 x 32 mm
Electromagnetic Compatibility (EMC)
Product Standard EN 61326-1:2006
Ambient Conditions
Accuracy 0 to + 40 C
Operation –5 ... + 50 C
Storage –20 ... + 60C (without batteries)
Relative humidity Max. 75%, no condensation allowed
Elevation Max. 2000 m
Mechanical Design
Display Multiple display with dot matrix
128 x 128 pixels
Dimensions W x L x D: 260 x 330 x 90 mm
Weight approx. 2.7 kg with batteries
Protection Housing: IP 40, test probe: IP 40 per
EN 60529/DIN VDE 0470, part 1
Excerpt from Table on the Meaning of IP Codes
Data Interfaces
Type USB slave for PC connection
Type RS 232 for barcode and RFID scanners
Type Bluetooth
®
for connection to a PC
(MTECH+, MXTRA & SECULIFE IP only)
BAT
Interference
emission
Class
EN 55022 A
Interference
immunity
Test Value Feature
EN 61000-4-2 Contact/atmos. –
4 kV/8 kV
EN 61000-4-3 10 V/m
EN 61000-4-4 Mains conn. – 2 kV
EN 61000-4-5 Mains conn. – 1 kV
EN 61000-4-6 Mains conn. – 3 V
EN 61000-4-11 0.5 period / 100%
IP XY
(1
st
digit X)
Protection Against Foreign
Object Entry
IP XY
(2
nd
digit Y)
Protection Against
Penetration by Water
4 1.0 mm dia. 0 Not protected
GMC-I Messtechnik GmbH 87
20 Maintenance
20.1 Firmware Revision and Calibration Information
See section 4.6.
20.2 Rechargeable Battery Operation, and Charging
Check to make sure that no leakage has occurred at the
rechargeable batteries at short, regular intervals, or after the
instrument has been in storage for a lengthy period of time.
Note
Prior to lengthy periods of rest (e. g. holiday), we recom-
mend removing the rechargeable batteries. This helps to
prevent excessive depletion or leakage of batteries,
which, under unfavourable circumstances, may cause
damage to the instrument.
If battery voltage has fallen below the allowable
lower limit, the pictograph shown at the right
appears. “Low Batt!!!” is also displayed along with a battery icon.
The instrument does not function if the batteries have been
depleted excessively, and no display appears.
Attention!
!
Use only the charger Z502R to charge the Kompakt Akku-
Pack Master (Z502H) which has already been inserted into
the test instrument.
Make sure that the following conditions have been fulfilled be-
fore connecting the charger to the charging socket:
– Kompakt Akku-Pack Master (Z502H) has been
installed, no commercially available battery packs, no
individual rechargeable batteries, no standard batteries
– The test instrument has been disconnected from the
measuring circuit at all poles
– The instrument must remain off during charging.
If the batteries or the battery pack (Z502H) have not been used or
recharged for a lengthy period of time (> one month), thus result-
ing in excessive depletion:
Observe the charging sequence (indicated by LEDs at the char-
ger) and initiate a second charging sequence if necessary (dis-
connect the charger from the mains and from the test instrument
to this end, and then reconnect it). Please note that the system
clock stops in this case and must be set to the correct time after
the instrument has been restarted.
20.2.1 Charging Procedure with Charger for Z502R
➭ Insert the correct mains plug for your country into the charger.
Attention!
!
Make sure that Kompakt Akku Pack Master (Z502H) has
been inserted, no battery holder.
For charging in the tester, only use Kompakt Akku Pack Master (Z502H),
which is either included in the standard equipment or available as an
accessory, with heat-sealed battery cells.
➭ Connect the charger to the test instrument with the jack plug,
and then to the 230 V mains with the interchangeable plug.
(The charger is suitable for mains operation only!)
Attention!
!
Do not switch the test instrument on during charging.
Monitoring of the charging process by the microproces-
sor might otherwise be disturbed, in which case the
charging times specified in the technical data can no lon-
ger be assured.
➭ Please refer to the operating instructions included with the
charger regarding the meanings of LED displays during the
charging process.
➭ Do not disconnect the charger from the test instrument until
the green LED (charged/ready) lights up.
20.3 Fuses
If a fuse has blown due to overload, a corresponding message
error appears at the display panel. The instrument’s voltage mea-
suring ranges are nevertheless still functional.
Replacing the Fuse
Attention!
!
Disconnect the device from the measuring circuit at all
poles before opening the fuse compartment lid!
➭ Loosen the slotted screws at the fuse compartment lid next to
the mains power cable with a screwdriver. The fuses are now
accessible.
➭ Replacement fuses can be accessed after opening the battery
compartment lid.
Attention!
!
Severe damage to the instrument may occur if incorrect
fuses are used.
Only original fuses from GMC-I Messtechnik GmbH may
be used (order no. 3-578-285-01 / SIBA 7012540.3.15
SI-EINSATZ FF 3.15/500 6.3X32).
Only original fuses assure required protection by means
of suitable blowing characteristics. Short-circuiting of
fuse terminals or the repair of fuses is prohibited, and is
life endangering!
The instrument may be damaged if fuses with incorrect
ampere ratings, breaking capacities or blowing charac-
teristics are used!
➭ Remove the defective fuse and insert a new one.
➭ Insert the fuse compartment lid after the fuse has been re-
placed and secure it by turning clockwise.
20.4 Housing
No special maintenance is required for the housing. Keep outside
surfaces clean. Use a slightly dampened cloth for cleaning. In par-
ticular for the protective rubber surfaces, we recommend a moist,
lint-free microfiber cloth. Avoid the use of cleansers, abrasives or
solvents.
Return and Environmentally Sound Disposal
The instrument is a category 9 product (monitoring and control
instrument) in accordance with ElektroG (German electrical and
electronic device law). This device is subject to the RoHS direc-
tive. Furthermore, we make reference to the fact that the current
status in this regard can be accessed on the Internet at
www.gossenmetrawatt.com by entering the search term WEEE.
In accordance with WEEE 2012/19EU and ElektroG, we
identify our electrical and electronic devices with the sym-
bol in accordance with DIN EN 50419 which is shown at
the right. Devices identified with this symbol may not be disposed
of with the trash. Please contact our service department regard-
ing the return of old devices (see address in section 22).
If the (rechargeable) batteries used in your instrument are depleted,
they must be disposed of properly in accordance with valid
national regulations.
Batteries may contain pollutants and heavy metals such as lead
(Pb), cadmium (Cd) and mercury (Hg).
The symbol to the right indicates that batteries must not
be disposed of with the trash, and must be brought to a
designated collection point.
BAT
Pb Cd Hg
88 GMC-I Messtechnik GmbH
21 Appendix
21.1 Tables for the determination of maximum or minimum display values under consideration of maximum measuring uncertainty:
Table 1
Table 2
Table 3
Table 4
Z
L-PE.
(full wave) / Z
L-N
()
Z
L-PE .
(+/- half-wave)
()
Limit
Value
Max. Dis-
play Value
Limit
Value
Max. Dis-
play Value
0.10 0.07 0.10 0.05
0.15 0.11 0.15 0.10
0.20 0.16 0.20 0.14
0.25 0.20 0.25 0.18
0.30 0.25 0.30 0.22
0.35 0.30 0.35 0.27
0.40 0.34 0.40 0.31
0.45 0.39 0.45 0.35
0.50 0.43 0.50 0.39
0.60 0.51 0.60 0.48
0.70 0.60 0.70 0.56
0.80 0.70 0.80 0.65
0.90 0.79 0.90 0.73
1.00 0.88 1.00 0.82
1.50 1.40 1.50 1.33
2.00 1.87 2.00 1.79
2.50 2.35 2.50 2.24
3.00 2.82 3.00 2.70
3.50 3.30 3.50 3.15
4.00 3.78 4.00 3.60
4.50 4.25 4.50 4.06
5.00 4.73 5.00 4.51
6.00 5.68 6.00 5.42
7.00 6.63 7.00 6.33
8.00 7.59 8.00 7.24
9.00 8.54 9.00 8.15
9.99 9.48 9.99 9.05
R
E
/ R
ELoop
()
Limit
Value
Max. Dis-
play Value
Limit
Value
Max. Dis-
play Value
Limit
Value
Max. Dis-
play Value
0.10 0.07 10.0 9.49 1.00 k 906
0.15 0.11 15.0 13.6 1.50 k 1.36 k
0.20 0.16 20.0 18.1 2.00 k 1.81 k
0.25 0.20 25.0 22.7 2.50 k 2.27 k
0.30 0.25 30.0 27.2 3.00 k 2.72 k
0.35 0.30 35.0 31.7 3.50 k 3.17 k
0.40 0.34 40.0 36.3 4.00 k 3.63 k
0.45 0.39 45.0 40.8 4.50 k 4.08 k
0.50 0.43 50.0 45.4 5.00 k 4.54 k
0.60 0.51 60.0 54.5 6.00 k 5.45 k
0.70 0.60 70.0 63.6 7.00 k 6.36 k
0.80 0.70 80.0 72.7 8.00 k 7.27 k
0.90 0.79 90.0 81.7 9.00 k 8.17 k
1.00 0.88 100 90.8 9.99 k 9.08 k
1.50 1.40 150 133
2.00 1.87 200 179
2.50 2.35 250 224
3.00 2.82 300 270
3.50 3.30 350 315
4.00 3.78 400 360
4.50 4.25 450 406
5.00 4.73 500 451
6.00 5.68 600 542
7.00 6.63 700 633
8.00 7.59 800 724
9.00 8.54 900 815
R
ISO
M
Limit Value
Min. Dis-
play Value
Limit Value
Min. Dis-
play Value
0.10 0.12 10.0 10.7
0.15 0.17 15.0 15.9
0.20 0.23 20.0 21.2
0.25 0.28 25.0 26.5
0.30 0.33 30.0 31.7
0.35 0.38 35.0 37.0
0.40 0.44 40.0 42.3
0.45 0.49 45.0 47.5
0.50 0.54 50.0 52.8
0.55 0.59 60.0 63.3
0.60 0.65 70.0 73.8
0.70 0.75 80.0 84.4
0.80 0.86 90.0 94.9
0.90 0.96 100 106
1.00 1.07 150 158
1.50 1.59 200 211
2.00 2.12 250 264
2.50 2.65 300 316
3.00 3.17
3.50 3.70
4.00 4.23
4.50 4.75
5.00 5.28
6.00 6.33
7.00 7.38
8.00 8.44
9.00 9.49
R
LO
Limit Value
Max. Dis-
play Value
Limit Value
Max. Dis-
play Value
0.10 0.07 10.0 9.59
0.15 0.12 15.0 14.4
0.20 0.17 20.0 19.2
0.25 0.22 25.0 24.0
0.30 0.26 30.0 28.8
0.35 0.31 35.0 33.6
0.40 0.36 40.0 38.4
0.45 0.41 45.0 43.2
0.50 0.46 50.0 48.0
0.60 0.55 60.0 57.6
0.70 0.65 70.0 67.2
0.80 0.75 80.0 76.9
0.90 0.84 90.0 86.5
1.00 0.94 99.9 96.0
1.50 1.42
2.00 1.90
2.50 2.38
3.00 2.86
3.50 3.34
4.00 3.82
4.50 4.30
5.00 4.78
6.00 5.75
7.00 6.71
8.00 7.67
9.00 8.63
GMC-I Messtechnik GmbH 89
Table 5
Table 6
Short-Circuit Current Minimum Display Values
for the determination of nominal current for various fuses and breakers for systems with nominal voltage of U
N
= 230 V
Example
Display value 90.4 A next smaller value for circuit breaker char-
acteristic B from table: 85 A protective device nominal current
(I
N
) max. 16 A
Z
ST
k
Limit Value
Min. Dis-
play Value
10 14
15 19
20 25
25 30
30 36
35 42
40 47
45 53
50 58
56 65
60 69
70 80
80 92
90 103
100 114
150 169
200 253
250 315
300 378
350 440
400 503
450 565
500 628
600 753
700 878
800 >999
Nominal
Current
I
N
[A]
Low Resistance Fuses
per DIN VDE 0636 series of standards
With Circuit Breaker and Line Switch
Characteristic gL, gG, gM Characteristic B/E
(formerly L)
Characteristic C
(formerly G, U)
Characteristic D
Characteristic K
Breaking Current I
A
5 s Breaking Current I
A
0.4 s Breaking Current I
A
5 x I
N
(< 0.2 s/0.4 s)
Breaking Current I
A
10 x I
N
(< 0.2 s/0.4 s)
Breaking Current I
A
20 x I
N
(< 0.2 s/0.4 s)
Breaking Current I
A
12 x I
N
(< 0.1 s)
Limit Value
[A]
Min.
Display
[A]
Limit Value
[A]
Min.
Display
[A]
Limit Value
[A]
Min.
Display
[A]
Limit Value
[A]
Min.
Display
[A]
Limit Value
[A]
Min.
Display
[A]
Limit Value
[A]
Min.
Display
[A]
2 9.2 10 16 17 10 11 20 21 40 42 24 25
314.11524251516303260643638
4192032342021404280854851
627284750303260641201287276
8373965694042808516017296102
10 47 50 82 87 50 53 100 106 200 216 120 128
13 56 59 98 104 65 69 130 139 260 297 156 167
16 65 69 107 114 80 85 160 172 320 369 192 207
20 85 90 145 155 100 106 200 216 400 467 240 273
25 110 117 180 194 125 134 250 285 500 578 300 345
32 150 161 265 303 160 172 320 369 640 750 384 447
35 173 186 295 339 175 188 350 405 700 825 420 492
40 190 205 310 357 200 216 400 467 800 953 480 553
50 260 297 460 529 250 285 500 578 1000 1.22 k 600 700
63 320 369 550 639 315 363 630 737 1260 1.58 k 756 896
80 440 517 960 1.16 k
100 580 675 1200 1.49 k
125 750 889 1440 1.84 k
160 930 1.12 k 1920 2.59 k
90 GMC-I Messtechnik GmbH
21.2 At which values should/must an RCD actually be tripped?
Requirements for Residual Current Devices (RCDs)
General Requirements
• Tripping must occur no later than upon occurrence of rated re-
sidual current (nominal differential current I
N
).
and
• Maximum time to trip may not be exceeded.
Additional requirements due to influences on the tripping current range
and the point in time of tripping which have to be taken into consider-
ation:
• Residual current type or waveform:
This results in a reliable tripping current range.
• Mains type and line voltage:
This results in maximum tripping time.
• RCD variant (standard or selective):
This results in maximum tripping time.
Definitions of Requirements in the Standards
VDE 0100, part 600, which is included in all German standards col-
lections for electricians, applies to measurements in electrical sys-
tems. It plainly states: “The effectiveness of the protective mea-
sure is substantiated when shut-down occurs no later than upon
occurrence of rated differential current I
N
.”
As a requirement for the measuring instrument manufacturer,
DIN EN 61557-6 (VDE 0413, part 6) unmistakably specifies:
“The measuring instrument must be capable of substantiating the
fact that the residual current which trips the residual current
device (RCD) is less than or equal to rated residual current.”
Comment
For all electricians, this means that during scheduled protective
measures testing after system modifications or additions to the
system, as well as after repairs or during the E-check conducted
after measurement of contact voltage, the trip test must be con-
ducted no later than upon reaching a value of, depending upon
the RCD, 10, 30, 100, 300 or 500 mA
How does the electrician react in the event that these values are
exceeded? The RCD is replaced!
If it was relatively new, a complaint is submitted to the manufac-
turer. And in his laboratory he determines: The RCD complies with
the manufacturer’s standard and is OK.
A look at the VDE 0664-10/-20/-100/-200 manufacturer’s stan-
dard shows us why:
Because the current waveform plays a significant role, the current
waveform used by the test instrument is also important.
Set residual current type or waveform at the test instrument:
It’s important to be able to select and take advantage of the cor-
responding settings at one’s own test instrument.
The situation is similar for breaking times. The new VDE 0100
part 410, should also be included in the standards collection.
Depending upon mains type and line voltage, it specifies breaking
times ranging from 0.1 to 5 seconds.
RCDs usually interrupt more quickly, but in some cases they can
take a bit longer. Once again, the ball is in the manufacturer’s
court.
The following table is also included in VDE 0664:
Two limit values are highly conspicuous:
Standard Max. 0.3 s
Selective Max. 0.5 s
All of the limit values are already included in good test instru-
ments, or it’s possible to enter them directly and they’re displayed
as well!
Select or set limit values at the test instrument:
Type of Residual Current Residual
Current
Waveform
Allowable Tripping
Current Range
Sinusoidal alternating current 0.5 ... 1 I
N
Pulsating direct current
(positive or negative half-waves)
0.35 ... 1.4 I
N
Phase angle controlled
half-wave currents
Phase angle of 90° el
Phase angle of 135° el
0.25 ... 1.4 I
N
0.11 ... 1.4 I
N
Pulsating direct current superimposed
with 6 mA smooth, direct residual current
Max. 1.4 I
N
+ 6 mA
Smooth direct current 0.5 ... 2 I
N
System
50 V < U
0
120 V
120 V < U
0
230 V 230 V < U
0
400 V
U
0
> 400 V
AC DC AC DC AC DC AC DC
TN
0.8 s 0.4 s 5 s 0.2 s 0.4 s 0.1 s 0.1 s
TT
0.3 s 0.2 s 0.4 s 0.07 s 0.2 s 0.04 s 0.1 s
Variant
Residual
Current
Type
Breaking Time at
Alternating
residual
current
1 x I
N
2 x I
N
5 x I
N
500 A
Pulsating
direct residual
current
1.4 x
I
N
2 x 1.4 x I
N
5 x 1.4 x I
N
500 A
Smooth, direct
residual
current
2 x
I
N
2 x 2 x I
N
5 x 2 x I
N
500 A
Standard
(undelayed)
or briefly
delayed
300 ms Max. 0.15 s Max. 0.04 s Max. 0.04 s
Selective 0.13 ... 0.5 s 0.06 ... 0.2 s 0.05 ... 0.15 s 0.04 ... 0.15 s
Negative half-wave
Positive half-wave
Waveform:
Negative direct current
Positive direct current
GMC-I Messtechnik GmbH 91
Tests for electrical systems include “visual inspection”, “testing”
and “measurement”, and thus may only be conducted by experts
with appropriate work experience.
In the final analysis, the values from VDE 0664 are technically
binding.
21.3 Testing Electrical Machines per DIN EN 60204 –
Applications, Limit Values
The PROFITEST 204+ test instrument has been developed for the
testing of electrical machines and controllers. After a revision to
the standard in 2007, measurement of loop impedance is now
additionally required. Measurement of loop impedance, as well as
other measurements required for the testing of electrical
machines, can be performed with test instruments from the
PROFITEST MASTER series.
Comparison of Tests Specified by the Standards
Uninterrupted Connection of a Protective Conductor
Uninterrupted connection of a protective conductor system is
tested here be using an alternating current of 0.2 to 10 A with a
line frequency of 50 Hz (= low-resistance measurement). Testing
must be conducted between the PE terminal and various points
within the protective conductor system.
Loop Impedance Measurement
Loop impedance Z
L-PE
is measured and short-circuit current I
K
is
ascertained in order to determine if the breaking requirements for
protective devices have been fulfilled (see section 8).
Insulation Resistance Measurement
All of the active conductors in the primary circuit are short-cir-
cuited at the machine (L and N, or L1, L2, L3 and N) and mea-
sured against PE (protective conductor). Controllers or machine
components which are not laid out for these voltages (500 V DC)
can be disconnected from the measuring circuit for the duration
of the measurement. The measured value may not be any less
than 1 MOhm. The test can be subdivided into separate seg-
ments.
Voltage Tests (with PROFITEST 204HP/HV only)
The electrical equipment of the machine under test must with-
stand a test voltage of twice its own rated voltage value or 1000
V~ (whichever is largest) applied between the conductors of all
circuits and the protective conductor system for a period of at
least 1 second. The test voltage must have a frequency of 50 Hz,
and must be generated by a transformer with a minimum power
rating of 500 VA.
Voltage Measurement
The EN 60204 standard specifies that after switching supply
power off, residual voltage must drop to a value of 60 V or less
within 5 seconds at all accessible, active components of a
machine to which a voltage of greater that 60 V is applied during
operation.
Function Test
The machine is operated with nominal voltage and tested for cor-
rect functioning, in particular with regard to safety functions.
Special Tests
• Pulse control mode for troubleshooting (with
PROFITEST 204HP/HV only)
• Protective conductor test with 10 A test current (with
PROFITEST 204+ only)
Limit Values per DIN EN 60204, Part 1
Overvoltage Protection Device Characteristics for
Limit Value Selection for Protective Conductor Testing
Tests per DIN EN 60204, part 1
(machines)
Tests per DIN EN 61557
(systems)
Meas.
Func-
tion
Uninterrupted connection of a
protective conductor
Part 4: resistance of:
– Ground conductor
– Protective conductor
– Bonding conductor
RLO
Loop impedance Part 3: loop impedance ZL-PE
Insulation resistance Part 2: insulation resistance RISO
Voltage test
(test for absence of voltage)
——
Voltage measurement (protec-
tion against residual voltage)
Part 10: Combined measuring
equipment (amongst others for volt-
age measurement) for testing, mea-
suring or monitoring of protective
measures
U
Function test ——
Measurement Parameter Cross-
Section
Standard
Value
Protective conduc-
tor measurement
Test Duration 10 s
Limit value for protective
conductor resistance
based on phase conductor
cross-section and charac-
teristics of the overvoltage
protection device (calcu-
lated value)
1.5 mm²
2.5 mm²
4.0 mm²
6.0 mm²
10 mm²
16 mm²
25 mm² L
(16 mm² PE)
35 mm² L
(16 mm² PE)
50 mm² L
(25 mm² PE)
70 mm² L
(35 mm² PE)
95 mm² L
(50 mm² PE)
120 mm² L
(70 mm² PE)
500 m
500 m
500 m
400 m
300 m
200 m
200 m
100 m
100 m
100 m
050 m
050 m
Insulation resistance
measurement
Nominal voltage 500 V DC
Resistance limit value 1M
Leakage current
measurement
Leakage current 2.0 mA
Voltage measure-
ment
Discharge time 5 s
Voltage test
Test duration 1 s
Test voltage 1 kV
or 2 U
N
Breaking Time, Characteristics Available for Cross-Section
Fuse breaking time: 5 s All cross-sections
Fuse breaking time: 0.4 s 1.5 through 16 sq. mm
Circuit breaker, characteristic B
Ia = 5 x In – breaking time: 0.1s
1.5 through 16 sq. mm
Circuit breaker, characteristic C
Ia = 10x In – breaking time: 0.1s
1.5 through 16 sq. mm
Adjustable circuit breaker
Ia = 8 x In - break time: 0.1s
All cross-sections
92 GMC-I Messtechnik GmbH
21.4 Periodic Testing per DGUV provision 3 (previously BGV A3)
– Limit Values for
Electrical Systems and Operating Equipment
Limit Values per DIN VDE 0701-0702
Maximum Allowable Limit Values for Protective Conductor
Resistance for Connector Cables with Lengths of up to 5 m
1
This value may not exceed 1 for permanently connected data processing sys-
tems (DIN VDE 0701-0702).
2
Total protective conductor resistance of max. 1
Minimum Allowable Limit Values for Insulation Resistance
* With activated heating elements (if heating power > 3.5 kW and R
ISO
< 0.3 M:
leakage current measurement is required)
Maximum Allowable Limit Values for Leakage Current in mA
* For devices with heating power of greater than 3.5 kW
Note 1: Devices which are not equipped with accessible parts that are
connected to the protective conductor, and which comply with re-
quirements for housing leakage current and, if applicable, patient
leakage current, e.g. computer equipment with shielded power
pack
Note 2: Permanently connected devices with protective conductor
Note 3: Portable x-ray devices with mineral insulation
Key
I
B
Housing leakage current (probe or contact current)
I
DI
Residual current
I
SL
Protective conductor current
Maximum Allowable Limit Values for Equivalent Leakage Current in
mA
1
For devices with heating power 3.5 kW
Test Standard Test Current
Open-Circuit
Voltage
R
SL
Housing –
Mains Plug
VDE 0701-0702:2008 > 200 mA 4 V < U
L
< 24 V
0.3 
1
+ 0.1
2
for each
additional 7.5 m
Test
Standard
Test
Voltage
R
ISO
PC I PC II PC III Heating
VDE 0701-
0702:2008
500 V 1 M 2M 0.25 M 0.3 M *
Test Standard
I
PE
I
C
I
DI
VDE 0701-0702:2008
SC I: 3.5
1 mA/kW *
0.5
SC I:
3.5
1 mA/
kW *
SC II:
0.5
Test Standard I
EL
VDE 0701-0702:2008
SC I: 3.5
1 mA/kW
1
SC II: 0.5
GMC-I Messtechnik GmbH 93
21.5 List of Abbreviations and their Meanings
RCCBs (residual current devices / RCDs)
I
Tripping current
I
N
Nominal residual current
I
F
Rising test current (residual current)
PRCD Portable residual current device
PRCD-S:
with protective conductor detection and monitoring
PRCD-K:
with undervoltage trigger and protective conductor monitoring
RCD- Selective RCCB
R
E
Calculated earthing or earth electrode loop resistance
SRCD Socket residual current device (permanently installed)
t
a
Time to trip / breaking time
U
I
Contact voltage at moment of tripping
U
IN
Contact voltage
relative to nominal residual current I
N
U
L
Contact voltage limit value
Overcurrent Protective Devices
I
K
Calculated short-circuit current (at nominal voltage)
Z
L-N
Line impedance
Z
L-PE
Loop impedance
Earthing
R
B
Operational earth resistance
R
E
Measured earthing resistance
R
ELoop
Earth electrode loop resistance
Low-Value Resistance at
Protective, Earthing and Bonding Conductors
R
LO+
Bonding conductor resistance (+ pole to PE)
R
LO–
Bonding conductor resistance (– pole to PE)
Insulation
R
E(ISO)
Earth leakage resistance (DIN 51953)
R
ISO
Insulation resistance
R
ST
Standing surface insulation resistance
Z
ST
Standing surface insulation impedance
Current
I
A
Breaking current
I
L
Leakage current (measured with current clamp trans-
former)
I
M
Measuring current
I
N
Nominal current
I
P
Test current
Voltage
f Line voltage frequency
f
N
Nominal voltage rated frequency
U Voltage drop as %
U Voltage measured at the test probes during and after
insulation measurement R
ISO
U
Batt
Battery voltage
U
E
Earth electrode voltage
U
ISO
For measurement of R
ISO
: test voltage, for ramp function:
triggering or breakdown voltage
U
L-L
Voltage between two phase conductors
U
L-N
Voltage between L and N
U
L-PE
Voltage between L and PE
U
N
Nominal line voltage
U
3~
Highest measured voltage during determination of
phase sequence
U
S-PE
Voltage between probe and PE
U
Y
Conductor voltage to earth
S
94 GMC-I Messtechnik GmbH
21.6 Keyword Index
A
Abbreviations ..........................................................................93
Adjusting Brightness and Contrast ..........................................10
B
Batteries
Charge Level
.....................................................................3
Installation ..........................................................................7
Battery
Test
...................................................................................7
Bibliography ............................................................................95
Bluetooth Active Display ............................................................3
C
Contact Voltage ......................................................................19
Current Clamp Sensor
Measuring Range ..........................................35, 40, 41, 50
D
Data Backup .............................................................................7
DB MODE
...............................................................................11
DB-MODE
...............................................................................11
Default Settings (GOME SETTING)
..........................................10
E
Earth Electrode Loop Resistance ............................................34
Earth Electrode Voltage
...........................................................34
Earth Fault Detection Systems
................................................56
Earth Leakage Resistance .......................................................46
Earthing Resistance Measurement
Overview
..........................................................................31
Electric charging stations ........................................................61
Electric vehicles ......................................................................61
F
Firmware Revision and Calibration Information ........................12
Firmware Update ....................................................................12
Fuse
Replacement
...................................................................87
I
Insulation Monitoring Devices ..................................................56
Interfaces
Configuring Bluetooth
......................................................11
USB, RS 232 Ports ............................................................2
Internet Addresses
..................................................................95
L
LCD Illumination
On-Time
..........................................................................10
Limit Values
DINEN 60204, Part 1
.......................................................91
DINVDE0701-0702
..........................................................92
Line Voltage (display of UL-N)
.................................................29
Line-to-Line Voltage ................................................................17
M
MASTER Updater ...................................................................12
Memory
Occupancy Display
............................................................3
MENNEKES test box ..............................................................61
N
Non-Tripping Test ...................................................................21
O
On-Time
Test Instrument ................................................................10
P
Parameter Lock ......................................................................14
Phase Sequence
.....................................................................17
Plausibility Check ....................................................................14
Polarity Reversal
.....................................................................15
PRCD
Test Sequences for Report Generation of Fault Simulations on
PRCDs with PROFITEST PRCD Adapter ........... 62
PRCD-K ................................................................................. 22
PRCD-S
................................................................................. 23
Profiles for Distributor Structures (PROFILES) ......................... 10
R
RCD-S ................................................................................... 22
Residual voltage test
.............................................................. 58
S
SCHUKOMAT ........................................................................ 23
Select System Type (TN, TT, IT) .............................................. 25
short-circuit current
................................................................ 29
Short-circuit current Calculation .............................................. 28
SIDOS .................................................................................... 23
SRCD
..................................................................................... 23
Standard
DIN EN 50178 (VDE 160) ................................................ 21
DIN EN 60 204
................................................................ 91
DIN VDE 0100 ........................................................... 26, 32
DIN VDE 0100, Part 410 ................................................. 22
DIN VDE 0100, Part 600
................................................... 5
DIN VDE 0100, Part 610
...........................................20, 27
EN 1081
.......................................................................... 46
IEC 61851
....................................................................... 61
NIV/NIN SEV 1000 ......................................................5, 34
ÖVE/ÖNORM E 8601 ...................................................... 24
ÖVE-EN 1
......................................................................... 5
VDE 0413 ............................................................18, 26, 30
Standing Surface Insulation Impedance ............................51, 53
Switching Bluetooth On/Off
.................................................... 11
Symbol ..................................................................................... 6
T
Test sequences ...................................................................... 64
Testing
BGVA3 ............................................................................ 92
Electrical Machines
.......................................................... 91
Type G RCCB ........................................................................ 24
U
User Interface Language (CULTURE) ...................................... 10
V
Voltage Drop as % (ZL-N function) .......................................... 52
W
warranty seal ............................................................................ 7
GMC-I Messtechnik GmbH 95
21.7 Bibliography
21.7.1 Internet Addresses for Additional Information
Statutory Source Documents
German occupational safety legislation (BetrSichV)
Regulations issued by the accident insurance carriers
Title Information
Rule / Regulation
Publisher Issue /
Order No.
Betriebs Sicherheits
Verordnung (BetrSichV)
BetrSichV
Elektrische Anlagen und
Betriebsmittel
DGUV provision 3
(up to now BGV A3)
DGUV
(up to now HVBG)
2005
VDE Standards
German standard Title Date of
Issue
Publisher
DIN VDE
0100-410
Protection against electric
shock
2007-06 Beuth-Verlag
GmbH
DIN VDE
0100-530
Erection of low-voltage
installations
Part 530: Selection and
erection of electrical equip-
ment - Switchgear and
controlgear
2011-06 Beuth-Verlag
GmbH
DIN VDE
0100-600
Erection of low-voltage
installations
Part 6: Tests
2008-06 Beuth-Verlag
GmbH
Series of standards
DIN EN 61557
Devices for testing, measur-
ing or monitoring protective
measures
2006-08 Beuth-Verlag
GmbH
DIN VDE
0105-100
Operation of electrical
installations, part 100:
General requirements
2009-10 Beuth-Verlag
GmbH
VDE 0122-1
DIN EN 61851-1
Electric vehicle conductive
charging system - Part 1:
General requirements (IEC
69/219/CD:2012)
2013-04 Beuth-Verlag
GmbH
Internet Address
www.dguv.de GUV information, rules and regulations
from Deutsche Gesetzliche Unfallversicherung e.V.
www.beuth.de VDE regulations, DIN standards, VDI directives from
Beuth-Verlag GmbH
www.bgetf.de BG information, rules and regulations from gewerbli-
che Berufsgenossenschaften e.g. BG ETEM (trade as-
sociation for energy, textiles, electrical, Medienerzeug-
nisse)
Edited in Germany • Subject to change without notice • PDF version available on the Internet
GMC-I Messtechnik GmbH
Südwestpark 15
90449 Nürnberg
• Germany
Phone:+49 911 8602-111
Fax: +49 911 8602-777
e-mail: info@gossenmetrawatt.com
www.gossenmetrawatt.com
22 Repair and Replacement Parts Service
Calibration Center* and Rental Instrument
Service
If required please contact:
GMC-I Service GmbH
Service-Center
Thomas-Mann-Strasse 16-20
90471 Nürnberg, Germany
Phone: +49 911 817718-0
Fax: +49 911 817718-253
E-mail service@gossenmetrawatt.com
www.gmci-service.com
This address is only valid in Germany. Please contact our repre-
sentatives or subsidiaries for service in other countries.
* DAkkS Calibration Laboratory for Electrical Quantities
D-K-15080-01-01
accredited per DIN EN ISO/IEC 17025:2005
Accredited quantities: direct voltage, direct current value, direct current resis-
tance, alternating voltage, alternating current value, AC active power, AC appar-
ent power, DC power, capacitance, frequency and temperature
Competent Partner
GMC-I Messtechnik GmbH is certified in accordance with
DIN EN ISO 9001:2008.
Our DAkkS calibration laboratory is accredited by the Deutsche
Akkreditierungsstelle GmbH (German accreditation body) under
registration number D-K-15080-01-01 in accordance with
DIN EN ISO/IEC 17025:2005.
We offer a complete range of expertise in the field of metrology:
from test reports and proprietary calibration certificates right on up to
DAkkS calibration certificates.
Our spectrum of offerings is rounded out with free test equipment
management.
An on-site DAkkS calibration station is an integral part of our service
department. If errors are discovered during calibration, our spe-
cialized personnel are capable of completing repairs using original
replacement parts.
As a full service calibration laboratory, we can calibrate instru-
ments from other manufacturers as well.
23 Recalibration
The measuring tasks performed with your instrument, and the
stressing it’s subjected to, influence aging of its components and
may result in deviation from the specified levels of accuracy.
In the case of strict measuring accuracy requirements, as well as
in the event of use at construction sites with frequent stress due
to transport and considerable temperature fluctuation, we recom-
mend a relatively short calibration interval of once per year. If your
instrument is used primarily in the laboratory and indoors without
considerable climatic or mechanical stressing, a calibration inter-
val of once every 2 to 3 years is sufficient as a rule.
During recalibration at an accredited calibration laboratory (DIN
EN ISO/IEC 17025), deviations from traceable standards demon-
strated by your measuring instrument are documented. Ascer-
tained deviations are used to correct displayed values during later
use of the instrument.
We would be happy to perform DAkkS or factory calibration for
you at our calibration laboratory. Further information is available at
our website:
www.gossenmetrawatt.com ( Company DAkkS Calibration
Center or FAQs Questions and Answers Regarding Calibra-
tion).
Recalibration of your instrument at regular intervals is essential for
the fulfillment of requirements according to quality management
systems per DIN EN ISO 9001.
* Examination of the specification, as well as adjustment, are not included in calibra-
tion. However, in the case of our own products, any required adjustment is per-
formed and adherence to the specification is confirmed.
24 Product Support
If required please contact:
GMC-I Messtechnik GmbH
Product Support Hotline
Phone: +49-911 8602-0
Fax: +49 911 8602-709
E-mail: support@gossenmetrawatt.com
… 94


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