Diodes Test - UNI-T UT20B Operating Manual

Model UT20B: OPERATING MANUAL
Measurement Operation (7)
E. Diodes Test
Warning
To avoid damages to the Meter or to the devices under test, disconnect circuit
power and discharge all the high-voltage capacitors before testing diodes.
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. A good silicon junction drops between 0.5V
and 0.8V.
To test a diode out of a circuit, connect the Meter as follows:
1. Set the rotary switch to .
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