BENNING MA 4 measuring adapter
2
3. Inspection characteristics of the measur-
ing adapter
All tests that can be carried out with your appliance tester for de-
vices with shock-proof socket and that are supported by the
measuring adapter can now be performed in an identical way for
devices with CEE connector.
Please observe the following aspects during tests using
your appliance tester:
When testing the protective conductor resistance, the value
of the measured protective conductor resistance increases
by the share caused by the protective conductor line of the
measuring adapter.
In case of measuring results near the admissible limiting
value, measure the protective conductor resistance of the
measuring adapter at the PE connection of its CEE socket
and subtract it from the total measuring value of the system.
Alternatively, when using the appliance testers BEN-
NING ST 755 / ST 760, a probe calibration can be carried
out at the PE connection of the CEE socket.
If the measuring adapter is not used, the probe must
then be calibrated again at the PE connection of the
appliance tester.
During insulating resistance or alternative leakage current
tests, the three phases L1, L2, L3 and the neutral conduc-
tor N of the test sample are shorted.
