DIODE TEST
WARNING: To avoid electric shock, do not test
any diode that has voltage on it.
1. Connect the black test lead to COM jack and the
red test lead to V
:
jack.
2. Set the function switch to the
position.
3. Turn off power to the circuit under test.
4. Touch probes to the diode. A forward-voltage
drop is about 0.6V(typical for a silicon diode).
5. Reverse the probes. If the diode is good, “OL” is
displayed. If the diode is shorted, “.000” or
another number is displayed.
6. If the diode is open, “OL” is displayed in both
directions.
7. If the junction is measured in a circuit and a low
reading is obtained with both lead connections,
the junction may be shunted by a resistance of
less than 1K
:
. In this case the diode must be
disconnected from the circuit for accurate
testing.
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Summary of Contents for AMM-1009
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