Operation Manual

MI 3310 / MI 3310A SigmaGT Measurements

Test circuit for clamp current measurement

Connecting current clamp to the instrument

Clamp current measurement procedure

 Select the Clamp current function.

 Set test parameters.

 Connect the current clamp to the instrument (see figure above).

 Embrace wire(s) that has to be measured with current clamp.

 Press the START key for measurement.

Examples of clamp current measurement result

Displayed results:

Main result ............. clamp current

Notes:

 When measuring leakage currents, the neighboring magnetic fields and capacitive

coupling (especially from the L and N conductors) can disturb the results. It is

recommended that the clamp is as close as possible to the grounded surface and

away from wires and other objects under voltage or carrying current.

 METREL offers high quality current clamps for this application.

 Green socket is intended for current clamp shield terminal, if exists. This will improve

measurement of leakage current. The socket is connected to internal grounding

system and through this to PE.