6600 COUNTS DIGITAL MULTIMETER
USER'S MANUAL
17
3.2.4 Diode Test
To avoid electrical shock and/or damage to the
instrument, disconnect circuit power and discharge
all high-voltage capacitors before testing diodes.
To test a diode out of a circuit (set up the Meter as shown in
Figure 3-4):
1. Set the rotary switch to
:
range.
2. Press the
SELECT
key once to activate Diode Test.
3. Connect the black and red test leads to the COM and V
:
terminals respectively.
4. For forward-bias readings on any semiconductor
component, place the red test lead tip on the component's
anode and place the black test lead tip on the component's
cathode.
5. The meter will show the approx. forward voltage of the
diode. If the polarity of test leads is reversed, "OL" will be
displayed.
In a circuit, a good diode(Silicon) should still produce a forward
bias reading of 0.5V to 0.8V; however, the reverse-bias reading
can vary depending on the resistance of other pathways
between the probe tips.
A
mA
uA
C
¡ £
Hz
V
OFF
F
¡ £
COM
A
V
Hz
mA
uA
A
mA
uA
C
¡ £
Hz
V
OFF
F
¡ £
COM
A
V
Hz
mA
uA
Figure 3-4 Testing a Diode
