Mode l UT71C/D/E: OPERATING MANUAL
E. Tes ti n g Diodes
Warnin g
To avoid harm s to you, plea se do not at t e m p t to inpu t
volt a g e s high e r than 60V DC or 30V rms AC.
To avoid dama g e s to the Met e r or to the devi c e s under
tes t, dis co n n e c t circ u i t po we r and disc h a r g e all the
high- vol ta g e cap a c i t o r s before tes t i n g diode s.
Use the diode test to check diodes, transistors, and
other semiconductor devices. The diode test sends a
current through the semicondutor junction, then measure
the voltage drop across the junction. A good silicon
junction drops between 0.5V and 0.8V
To test the diode out of a circuit, set up the Meter as
Figure 3-5 and proceed as follows:
1. Insert the red test lead into the terminal and the
black test lead into the
COM
terminal.
2. Set the rotary switch to; and press
BLUE
button to selectmeasurement mode.
Figure 3-5. Diode Test
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