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Gossen Metrawatt AT3-III E Manual

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10 GMC-I Messtechnik GmbH
7Self-Test
Because it is so easy to perform, the self-test should
be conducted before each use of the AT3-III E.
Please be careful to ensure that the case of the
AT3-III E is not being contacted with devices
under PE or earth potential during the self-test.
Performing the Protective Conductor Test
Ð
Insert the mains plug from the
SECUTEST.../
SECULIFE ST
into the earthing contact outlet (12)
at the AT3-III E.
ÐThe earthing contact plug (13) and the SE-
CUTEST port (14) of the AT3-III E may not be
plugged into the SECUTEST.../SECULIFE ST.
ÐConnect the AT3-III E to mains power.
ÐSet the SECUTEST.../SECULIFE ST to the
protective conductor test individual measure-
ment (RSL/RPE).
ÐContact protective conductor potential at the
mains system which is supplying power to the
AT3-III E with the test probe at the end of the
probe cable from the SECUTEST.../
SECULIFE ST, e.g. at the earthing contact of
an earthing contact outlet. If an excessively
high value or interruption is indicated, the pro-
tective conductor is interrupted.
The AT3-III E test adapter must be disconnected
from the mains, and the error in the electrical
system or the test adapter must be corrected. The
AT3-III E is equipped with a “Trigger IΔn” test key in
order to allow for testing the included IΔn safety
shutdown function at any time.
Performing the IΔn Self-Test
ÐRemove the device under test
(device or extension cable).
ÐSet the SECUTEST.../SECULIFE ST to individ-
ual measurement.
ÐSECUTEST.../SECULIFE ST (as of version
3.1): Select the “DI current” sub-menu (resid-
ual current).
ÐSignal lamps L1, L2 and L3 indicate the pres-
ence of line voltage.
ÐActivate the “Trigger IΔn” key (11).
ÐThe AT3-III E disconnects mains power from
the outlets (1 – 4).
ÐSignal lamps L1, L2 and L3 go out.
ÐThe function LED (10) blinks.
Disconnect the AT3-III E from the mains to re-
set. Reconnect the AT3-III E to the mains.
The test adapter is once again ready for use
after a brief self-test.
Note!
If mains power is not switched during this
test, the fuses in the AT3-III E may have
blown. If the AT3-III E still does not function
correctly after replacing the fuses, it must be
removed from service and repaired.
Measurement is no longer possible!
8 Technical Data
Residual Current Measuring Function
Measuring Range 0 … 20 mA
Transformation Ratio 1 V per 10 mA
Intrinsic Uncertainty ±(5%
of rdg.
+ 0.05 mA)
Nominal Ranges of Use
Line Voltage
L1/L2/L3/N 207 … 253 V AC
Frequency 49 … 51 Hz
Temperature 0 °C … +40 °C
Line Voltage
Waveshape sinusoidal
Reference Conditions
Ambient Temperature +23 °C ±2K
Relative Humidity 50% ±5%
Line Voltage 230 V/400 V ±10%
Frequency
of Measured Quantity 50 Hz ±0.2%
Ambient Conditions
Operating Temperatures –10 … + 40 °C
Storage Temperatures –25 … + 60 °C
Humidity max. 75%, no
condensation allowed
Elevation up to 2000 m
Power Supply
Nominal Line Voltage
3~230/400 V/50 Hz/CAT II
Connection only permissible with overload
protection device In = 16 A I2 ≤ 1.45 In
Electrical Safety
Standard
DIN VDE 0404-1/-2:2002-5
IEC/EN 61010-1:2010
Contamination degree 2
Safety Class I
Residual Current
Shutdown (4-pole) at approx. 18 mA
Device Fuses F0315 L250V
5 x 20 T32mA L 250 V
DIN EN 60127-2
… 10


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