METREL A 1322, Instruction Manual

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A 1322 / A 1422 Measurements
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Figure 5.2: Insulation resistance and Substitute leakage current test connections
(left figure - Class I appliance, right figure - Class II appliance)
Notes:

Consider any warning on the display before starting the measurement!

When P/S probe is connected during the test, then the current through it is also
considered.

Do not touch or disconnect the DUT during the insulation resistance
measurement or before it is fully discharged!

Substitute leakage current may differ substantially from that of conventional
leakage current test because of the way the test is performed. For example, the
difference in both leakage measurements will be affected by the presence of
neutral to earth noise suppression capacitors.
5.3 Differential leakage current measurement

Refer to master instrument Instruction manual, chapter Single test
measurements , subchapter Differential leakage for detailed information.
Leakage current is measured via power supply cord of tested appliance.
Procedure:
Item Comment

Prepare test system. See chapter 4.3 Working
with the adapter.

Connect power supply plug of tested appliance into
proper test socket. See Figure 5.3 .

Start measurement on the master instrument.

Wait until measurement is finished or stop the
measurement.

Check result(s).

Store result(s). Optional