UNI-T UT106 Operating Manual page 22

Note
l
In a circuit, a good diode should still produce a forward
voltage drop reading of 0.5V to 0.8V; however, the
reverse voltage drop reading can vary depending on
the resistance of other pathways between the probe
tips.
l
Connect the test leads to the proper terminals as said
above to avoid error display.
l
The open-circuit voltage is around 2.7V when testing
diode.
l
The LCD will display "1" indicating open-circuit or
wrong polarity connection.
l
When diode testing has been completed, disconnect
the connection between the testing leads and the
circuit under test.
Model UT106: OPERATING MANUAL
22