Testing Diodes - Keysight Technologies U1231A Guia Del Usuario

Testing Diodes

Set up your multimeter to test diodes as shown in
points and read the display.
To avoid possible damage to your multimeter or to the equipment under
CAUTION
test, disconnect the circuit power and discharge all high-voltage capacitors
before testing diodes.
– Use the diode test to check diodes, transistors, silicon controlled rectifiers
NOTE
– This test sends a current through a semiconductor junction, and then
– Connect the red test lead to the positive terminal (anode) of the diode and
Figure 2-12
Your multimeter can display the forward bias of a diode up to approximately
NOTE
2.1 V. The forward bias of a typical diode is within the range of 0.3 V to 0.8 V;
however, the reading can vary depending on the resistance of other pathways
between the probe tips.
Keysight U1231A, U1232A, and U1233A User's Guide
(SCRs), and other semiconductor devices. A good diode allows current to
flow in one direction only.
measures the junction's voltage drop.
the black test lead to the negative terminal (cathode). The cathode of a diode
is indicated with a band.
Diode display
Making Measurements
Figure 2-14. Probe the test
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