Axio MET AX-176, Instruction Manual

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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
To avoid elecrical shock and/or damage to the instrument, disconnect circuit Power and
discharge all high-voltage capacitors before testing diodes.
To test diode out of a circuit (set up the Meter as shown in Figure 3-4):
1) Set the rotary switch to
Ω Ω Ω Ω
range
2) Press the SELECT key once to activate Diode Test.
3) Connect the black and red test leads to the COM and V
Ω
terminals respectively.
4) For forwards-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 very depending on the resistance of other pathways between
the probe tips.
3.2.5. Continuity Check