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Gossen Metrawatt METRISO INTRO Manual

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GMC-I Messtechnik GmbH 17
DATA blinks at the display until the measured value has settled in.
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 approximately 1 mA
at a voltage of 1000 V. The resulting electrical shock is not life
endangering. However, the noticeable shock may lead to injury
(e.g. resulting from a startled reaction etc.).
Note
Three-Phase Systems
All conductors (L1, L2, L3 and N) must be measured
against PE!
Note
The instrument’s batteries are exposed to excessive
stress during insulation resistance measurement. For this
reason it’s advisable to perform individual rather than
continuous measurements.
5.3 Ending the Measurement
Individual measurement: Measurement is ended automatically as
soon as the measured value has settled in.
Continuous measurement is ended by briefly pressing the ESC key.
In either case, the measured value is retained at the 7-segment
display. When discharging begins, the unit of measure for the bar
graph changes from Ω to V. The length of the bar graph is contin-
uously reduced as voltage at the device under test drops.
Special Case: Capacitive Devices Under Test
Caution!
If measurement is performed at a capacitive object such
as a long cable, it becomes charged with up to approx.
1000 V (test voltage)! Touching such objects is life en-
dangering!
When an insulation resistance measurement has been performed
on a capacitive object it is automatically discharged by the instru-
ment. Contact between the object and the instrument must nev-
ertheless not be interrupted. Do not disconnect until:
•The caution LED (> 50 V) is no longer illuminated
•The high-voltage symbol is no longer displayed
•The analog bar graph has dropped to a value of less than 50 V
M
MAN
DATA
ISO
500 V
1
0
0
k
1
G
1
0
k
1
M
1
0
G
1
0
0
G
1
0
0
M
1
0
M
3.25
U
ISO/INS
M
MAN
DATA
ISO
500 V
3.25
U
I
S
O
/
I
N
S
R
ISO
/R
INS
= const.
0
2
5
V
5
0
V
5
0
0
V
… 17 …


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