Idiomas disponibles
Idiomas disponibles
2
Making Measurements
Testing Diodes
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 (SCRs),
and other semiconductor devices. A good diode allows current to flow in one
direction only.
This test sends a current through a semiconductor junction, and then measures
the junction's voltage drop. A typical junction drops 0.3 V to 0.8 V.
1 To test a diode out of a circuit, position the rotary switch to
2 Probe the test points and read the display.
Connect the red test lead to the positive terminal (anode) of the diode and the
NOTE
black test lead to the negative terminal (cathode). The cathode of a diode is
indicated with a band.
Figure 2-19
80
your multimeter as shown in
Diode display
Figure
2-21.
Keysight U1271A/U1272A User's Guide
/
and set up
Auto
