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GMC-I Messtechnik GmbH
10.1.2 RPE – Connecting Protection Class I Devices to the Test Socket
When the DUT is connected, resistance is
measured between the protective conductor
terminal at the test socket and the probe
connection at the DUT (contact with con-
ductive parts of the housing).
➭
In order to measure protective conductor
resistance, use the probe to contact a
conductive part of the housing which is
connected to the protective conductor.
During measurement, the
connector cable
must only be moved to the extent to which
it’s accessible during repair, modification or
testing.
If a change in resistance occurs during the
manual test step of the continuity test, it
must be assumed that the protective con-
ductor is damaged, or that one of the con-
nector contacts is no longer in flawless con-
dition.
Connection
➭
Connect the probe to the red probe
socket.
➭
Insert the test object’s mains plug into
the test socket.
➭
Switch the device under test on.
Procedure
➭
Press the
R
SL
key.
➭
Select the “
Plug
” menu with the help of
the
scroll keys.
➭
Start the measurement by pressing the
OK
key
.
➭
Review the preconfigured parameters for
cable length and cross-section, select
them if necessary using the
scroll
keys and adjust them to the momentary
value using the
scroll keys.
Adjusting the cable length and cross-section
parameters changes the limit value which is
shown at the top of the display.
➭
Contact the DUT’s housing with the
probe.
➭
In the case of moving parts, for example
with a drill, contact the drill chuck while
it’s rotating – preferably with the optional
brush probe.
➭
Move the mains power cord.
➭
Contact all parts connected to PE with
the probe.
➭
If the respective measured value is
smaller than the specified limit value, this
is indicated acoustically,
OK
appears at
the display and the
LED lights up
green.
➭
You can repeat the measurement by
pressing the
scroll key (reset), after
which the LED
goes out.