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12.7 Conducting a diode test
Make sure that all objects that you wish to measure (including circuit
components, circuits and component parts) are disconnected and dis-
charged.
1. Set the function dial to
.
2. Press the
SEL
button 2x to select diode test.
Æ
“
” will show on the display.
3. Plug the red lead into the
terminal and
the black lead into the
COM
terminal.
4. Check the measuring leads for continuity by
connecting both measuring probes to one
another. A value of approx. 0.000 V should
be shown.
5. Connect the two measuring probes to the
object that you want to measure (diode). Connect the red lead to the anode (+)
and the black lead to the cathode (-).
6. The normal PN junction forward voltage will be shown in Volts (“V”). “OL” indi-
cates that the diode is reverse-biased or defective. Try taking the measurement
again in the opposite polarity.
7. After taking a measurement, remove the leads from the measured object and
switch off the DMM.
