Operation
5.2 Testing with an oscilloscope
5178 / 03/2021 en
BENNING EV 3-2
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Requirements
• Oscilloscope (probe: 10:1, input resistance: 10 MΩ)
• Charging station (EVSE) compatible with the device
NOTE
Oscilloscope
• Using a 1 MΩ input resistor instead of the recommended 10 MΩ will reduce the amplitude of
the CP signal by approx. 17 % compared to the actual value.
• Compensate the oscilloscope and probe for correct signal representations.
• It is recommended to use a portable and battery-operated oscilloscope.
WARNING
Dangerous voltage
Danger to life or serious injury is possible due to contact with high electric voltage. An existing
50 Hz / 60 Hz interfering signal can be suppressed by connecting the 4 mm PE test socket of
the device to the earth connection of the oscilloscope.
• Make sure that there is no dangerous voltage potential at the PE contact of the charging
station (EVSE).
• Use safe accessories.
Procedure
1. Connect the oscilloscope to the device via the BNC socket.
2. Select the desired positions of the rotary switches.
– “PP-Status/State”: switch position according to the desired coding of the charging cable
(maximum current carrying capacity)
– “CP-Status/State”: switch position “A”
3. Connect the device to the output of the charging station (EVSE) via the Type 2 connector.
4. Simulate the different codings of the charging cables. For this, select the desired positions
of the rotary switches at the device.
– “PP-Status/State”: switch position according to the desired coding of the charging cable
(maximum current carrying capacity)
– “CP-Status/State”: switch position “B” or “C”
5. Check the waveform and amplitude of the CP signal on the oscilloscope. If necessary,
repeat the test for other codings of the charging cable.
6. Before disconnecting the device from the charging station (EVSE), set the rotary switch
“CP-Status/State” to the switch position “A”.
