Testing Diodes - Surtek 111004 Manual De Usuario

E N G L I S H
D.

Testing Diodes

To avoid damages to the Meter or to the
devices under test, disconnect circuit power and
discharge all the high-voltage capacitors before
Use the diode test to check diodes, transistors, and
other semiconductor devices. The diode test sends a
current through
semicondutor
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, connect the Meter
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 SELECT
Ω
button to select
3. For forward
semiconductor component, place the red test lead on
the component's anode and place the black test lead on
the component's cathode.
Note:
• In a circuit, a good diode should still produce a forward
voltage drop reading of 0.5V to 0.8; however, the
reverse voltage drop reading can vary depending on
the resistance of other pathways between the probe
tips.
• Connect the test leads to the proper terminals as said
above to avoid error display.
• The LCD will display OL indicating either open circuit
or wrong polarity connection.
• The unit of diode is volt (V), displaying the forward
voltage drop readings.
• To remove the objects being tested from the circuit
when measuring can obtain a more accurate result.
28
(Figure 6)
Warning
testing diodes.
the
junction,
V Ω
measurement mode.
voltage drop
Figure 6
readings on any