The controls and connectors of the current probe.
Current flow symbol.
The arrow shows the probe’s polarity convention for measuring current flowing from positive to negative.
Zero adjustment.
Rotate to adjust the probe output to zero when there is no current present. It may also be used to offset a DC signal component. Zeroing is not needed for AC measurements unless your instrument cannot isolate a DC component (if present).
OFF/Range switch.
Slide the switch from OFF to either the 10 mV/A or 100mV/A range. When either range is selected, the probe is turned on, and the green battery indicator lights.
Battery indicator.
The green battery indicator lights when the probe is turned on.
Overload indicator.
The red overload indicator lights if the measured signal is greater than the selected range capacity. Switch the probe to 10 mV/A if possible, or remove the probe from the circuit.