Figure 11Device View - Jacks - Benning ST 755+ Operating Manual

Testing
9.2 Connecting the safety measuring lines
WARNING
Dangerous voltage
Danger to life or serious injury is possible due to contact with high electric voltage in case of
incorrect operation.
• Do not touch the bare measuring probe tips of the safety measuring lines or the bare
contacts of the optional alligator clips, Only touch the safety measuring lines in the area
intended for your hands.
• Please note that dangerous testing voltages might be present at the device during insulating
resistance measurement. These might also be applied to the measuring circuit if safety
measuring lines are contacted.
• Connect the safety measuring lines to the correspondingly marked measuring jacks of the
device and check them for tight fit.
• Only use approved safety measuring lines.
• Attach the protective caps to the contact tips of the safety measuring lines (circuits of
overvoltage category CAT III or IV).
• When disconnecting the measuring circuit, first remove the live safety measuring line
(phase) and then the neutral safety measuring line from the measuring point.
Procedure
Connect the safety measuring lines to the following jacks according to the respective individual
test:
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Figure 11: Device view – jacks
1 Black measuring jacks for the test
probe
3 Black "L" jack is connected to the "L" of
the test socket (connection is
disconnected when mains voltage is
applied to the test socket)
5 Blue "N" jack is connected to the "N" of
the test socket (connection is
disconnected when mains voltage is
applied to the test socket)
Make sure that all terminal and plug connections are in perfect contact with the accessible and
conductive parts of the test sample.
5284 / 08/2023 en
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3
4
5
BENNING ST 755+ / ST 760+
2 Red measuring jack for safety
measuring line with probe tip for
voltage measurement
4 Yellow-green "PE" jack for safety
measuring line with probe tip for current
and insulating resistance
measurements
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