Notes: Fig. 3 shows the resistance measuring circuit. The
positive (+) polarity of the battery is connected to the
positive (+) terminal of meter. Therefore, the polarity of
the terminals is reversed for resistance measurements,
with output voltage from the -COM terminal being
positive (+) and output voltage from the +terminal
negative (-). (Fig. 3).
A good knowledge of this relationship will be helpful in
testing semi-conductors such as transistors and diodes
as well as electrolytic capacitors.
Polarity of Multimeter Terminals at
Resistance Measurements
Fig. 3
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