S-50 DC
● S-80 DC ● S-110 DC ● S-120 DC – USER MANUAL
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Measurement must be repeated at least three times during testing. The test time should be at least
15 min and max. 30 min. The tendency of the leakage current should be followed.
The following are all signs of increased wear to the test object:
the leakage current indicated is greater than the permitted leakage current,
the leakage currents of different wires in the same cable differ by more than 1:3,
the leakage current measured after approx. 60 seconds is less than the leakage current at
the end of the test time.
If the maximum operating current is exceeded, the overcurrent trip will respond and disconnect the
equipment from the mains. If this happens, the test object is defective.
If the nominal test voltage of the equipment is exceeded by approx. 5 kV, the overvoltage trip will re-
spond. If this happens, the high voltage will have to be switched back on (set the high-voltage adjuster
to zero first).
Fig. 4.2 Left: meter display. Right: graph display
During measurement both digital meters can be switched independently between a meter
display and a graph display. The right switch
is for the voltmeter and the left switch
is for the ammeter.
To display the meter, keep the switch in the lower position. For the graph display switch in-
to the middle position. The time base for the graph display can be changed by holding the
switch upwards for less than 2 seconds. At the first switch the actual time base is dis-
played. The next switch activates the next lower time base in predefined steps: 14, 7 days;
72, 48, 24, 12, 6 hours; 60, 30, 15, 3 minutes.
Switching the time base deletes the internal memory of the digital meter.
Choose a time base at the beginning of your measurement, which is equal to
your expected measure time!
