Amprobe ACD-6 Pro User Manual page 8

7
ACA Current clamp-on function
Inputs are made through the clamp jaws for non-invasive ACA current measurements.
CAUTION
Press the jaw trigger and clamp the jaws around only one single conductor of a circuit
for load current measurement. Make sure the jaws are completely closed, otherwise
this will introduce measurement errors. Enclosing more than one conductor of a circuit
will result in differential current (like identifying leakage current) measurement.
Adjacent current-carrying devices such as transformers, motors and conductor wires
will affect measurement accuracy. Keep the jaw's tip away from them as much as
possible to minimize influence.