Matco Tools MD79 Manual Del Usuario página 7

6
CAUTION & WARNING for Non-Invasive (Clamp-on) Current
Measurements:
CAUTION
(Application and Removal of the Clamp-on Jaws) For non-invasive
current measurements, press the jaw trigger and clamp the jaws
around conductor(s) of only one single pole of a circuit for load current
measurement. Make sure the jaws are completely closed, or else it will
introduce measurement errors. Enclosing conductor(s) of more than
one pole of a circuit may result in differential current (like identifying
leakage current) measurement. Align the conductor(s) to the Jaws
center indicators (Regular or AmpTip™ indicators where applicable) as
much as possible to get the best measuring accuracy. For removal,
press the jaw trigger and remove the jaws from the conductor(s).
Adjacent current-carrying devices such as transformers, motors and
conductor wires may affect measurement accuracy. Keep the jaws
away from them as much as possible to minimize influence.
WARNING
Do not use the meter to measure currents above the rated frequency
(400Hz). Circulating currents may cause the magnetic circuits of the
Jaws reach a hazardous temperature.