15
English
10
5.5 Diode testing
1. Connect the black test
lead to
and the red
test lead to
.
2. Set the function selector
to
for diode threshold
value (V) testing.
3. Press the blue button (10)
to select measurement
mode.
4. Connect the black test
lead to the cathode and
red test lead to the anode
of the diode to be tested.
Read the forward
voltage drop value from
the display. If
appears
on the display, reverse
the polarity of the diode.
Warning:
• Make sure that the circuit to be tested is not conducting any current before
testing diodes.
• Be extremely cautious when using this meter on an inductive component
such as a transformer, relay coils and the like, and make sure they have been
discharged beforehand. High voltage may be produced at the terminals if
an open circuit occurs.
Note:
A good diode should have a forward voltage drop of from 0.5 to 0.8 V. However,
the reverse voltage drop reading can vary a lot depending on the resistance of other
paths of conductance between the tips of the test leads.
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