Amprobe AM91RS Digital-Multimeter - Manual (Page 12)

11
Capacitance, Diode test function
Default at . Press SELECT button momentarily to select Diode test function.
CAUTION
Discharge capacitors before making any measurement. Large value capacitors should be
discharged through an appropriate resistance load
Note:
Normal forward voltage drop (forward biased) for a good silicon diode is between 0.400V
to 0.900V. A reading higher than that indicates a leaky diode (defective). A zero reading
indicates a shorted diode (defective). An OL indicates an open diode (defective). Reverse
the test leads connections (reverse biased) across the diode. The digital display shows
OL if the diode is good. Any other readings indicate the diode is resistive or shorted
(defective).