User manual

Getting Started
2
A622 Instructions
Table 1 highlights the controls and indicators on the A622 current
probe.
Table 1: A622 controls and indicators
Control/Indicator Description
Current flow symbol. The arrow show the probe’s polarity
convention for measuring current flowing from positive to
negative.
ZERO
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 100 mV/A range. When either range is selected, the
probe is turned on, and the green battery indicator lights. If the
indicator does not light, see Battery Notes and Battery Installation
on page 7.
Battery indicator. The green battery indicator lights when the
probe is turned on. For more information, see Battery Notes and
Battery Installation on page 7.
Overload indicator. The red overload indicator lights if the
measured signal is greater that the selected range capacity.
Switch the probe to 10 mV/A if possible, or remove the probe from
the circuit.