6
GOSSEN-METRAWATT
2
Applications
The insulation tester complies with the following specifications:
IEC 61557 / EN 61557 / VDE 0413 “Measuring and moni-
toring facilities for testing the electrical safety in lines with
nominal voltages up to AC 1000 V and DC 1500 V“.
Part 1 „General“;
Part 2 „Insulation resistance“;
Part 4 „Resistance measuring devices“.
It is suited to measure the insulation resistance of electrically
dead devices and systems having nominal voltages up to
1000 V and to test the resistance of ground conductors,
protective conductors and equipotential conductors includ-
ing their connections and connectors.
In addition, the fester has a 1000 V measuring range for
DC and AC voltage which complies with DIN VDE 0100
Part 610. This makes it particularly advantageous to test
devices for the absence of voltage and to discharge capac-
itive devices under test.
The most important applications of the insulation tester are
found in testing of systems and appliances such as required
by DIN VDE 0100, 0105, 0141, 0 701 and 0702 specifica-
tions, for example. Furthermore, it is possible to perform a
„test of the discharge capability for electrostatic charges for
floor coverings in explosion-hazardous rooms“ according to
DIN 51 953.
3
Getting started
3.1
Inserting the batteries
Attention!
!
Make sure that the rotary switch (6) is set to the
„OFF“ position prior to opening the battery com-
partment and that the tester is completely discon-
nected from all external circuits!
í
Undo the two slotted screws on the bottom of the tester
with an adequate tool and remove the cover of the bat-
tery compartment.
í
Insert 6 each 1.5 V mono-cells to IEC R20 (zinc-carbon)
or to IEC LR20 (alkaline-manganese) in the battery com-
partment, paying attention to the correct polarity in line
with the given symbols.
í
Replace the cover of the battery compartment and
tighten the screws.
3.2
Testing the batteries
When measuring the insulation resistance, the load on the
batteries is different on the three nominal voltage ranges.
That means, for example, that the „charging state“ of the
six mono-cells no longer assures compliance with the error
limits at a nominal voltage of 1000 V while many measure-
ments can still be made with the specified accuracy at
250 V. That is why the tester offers the possibility to test the
batteries under operating conditions for each of the three
nominal voltages. The lamp in the probe is on at times.