Diode And Continuity Test - UNI-T UT33A Operating Manual

Model UT33A: OPERATING MANUAL
Measurement Operation (10)
F. Diode and Continuity Test (see figure 6)
Testing Diodes
Warning
To avoid damages to the Meter or to the
devices under test, disconnect circuit power
and discharge all the high-voltage capacitors
before diodes.
black red
Use the diode test to check diodes, transistors,
and other semiconductor devices. The diode test
sends a current through the semiconductor junction,
and then measures the voltage drop across the junction.
(figure 6)
A good silicon junction drops between 0.5V and 0.8V.
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