Testing Diodes - UNI-T UT208A Operating Manual

Note
● To avoid harms to you or damages to the Meter from eletric shock, do not
attempt to input voltages higher than 33V AC or 70V DC.
● When continuity testing has been completed, disconnect the connection
between the testing leads and the circuit under test and remove testing leads
from the input terminals.
D. Testing Diodes (see figure 6)
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 semicondutor junction, then measure
the voltage drop across the junction. A good silicon junction drops between 0.5V
and 0.8V.
To test the diode out of a circuit, connect the Meter as follows:
UT207A/208A/209A Operating Manual
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