Non-intrusive touch measurements using the COP and Signal Probe

Purpose

The purpose of the test is to confirm the operation of high-frequency and fast switching components within Electric Vehicle (EV) and hybrid systems using non-intrusive Coil On Plug (COP) and Signal Probe measurements.

COP and Signal Probe measurements.

Further information

In the example above, the COP Signal Probe detects the oscillating AC current (charge) in the circuit between the EVSE and the On Board Charger (OBC), before it is rectified to the DC voltage and current used to recharge the High Voltage (HV) battery. As such, the COP and Signal Probe can provide a safe and convenient quick check method for confirming the delivery of charge from the EVSE to the vehicle.

The COP and Signal Probe can be used to confirm the presence of activity in other circuits with high frequency or switching voltage characteristics.

When measured with the COP and Signal Probe, the absence of the waveform does not confirm that a voltage or current is not present (it might be that the components or cabling are so well shielded that the probe is unable to detect them); the COP and Signal Probes can only be used to confirm that a voltage or current is present.

The COP and Signal Probe cannot detect constant DC voltages or currents, whether they are within HV components or otherwise.

Always ensure that the COP and Signal Probe and its connection lead are not used in the presence of exposed HV circuits, components or systems and are kept clear from rotating components (whether moving or not).

GT929-EN