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GMC-I Messtechnik GmbH
10.2.2 RISO – LN-Probe
L and N are short-circuited in the test instru-
ment during this measurement and a test
voltage of 500 V (or 250 V with “Surge
Arrester: Yes”) is applied between LN and
PE.
Not Applicable for PC III
This measurement is not performed if there
are no insulated and conductive parts.
Conductive, insulated parts must be con-
tacted one after the other.
Measurement is performed with the DUT in
the de-energized state.
Insulation is measured between LN at the
DUT and accessible, conductive and insu-
lated parts, as well as ELV parts if included.
Connection
➭
Insert the test object’s mains plug into
the test socket.
➭
Connect the probe to the red probe
socket.
Procedure
➭
Press the
R
ISO
key.
➭
Select the “
LN-Probe
” menu with the help
of the
scroll keys.
➭
Start the measurement by pressing the
OK
key.
➭
Contact all insulated, accessible, con-
ductive (and SELV) parts with the probe.
➭
If the respective measured value is larger
than the specified limit value,
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 briefly until
the next measurement is performed.
