Keysight Technologies U1273A Guide De L'utilisateur page 79

Testing Diodes
Set up your multimeter to test diodes as shown in
points, and read the display.
Table 2-12 Rotary switch position allowing diode tests
Legend Defaul t function
Diode test
Auto
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 2-20
Keysight U1273A/U1273AX 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. A typical junction drops 0.3 V to 0.8 V.
the black test lead to the negative terminal (cathode). The cathode of a diode
is indicated with a band.
Diode display
Making Measurements
Figure
is pressed
Function when
Auto-diode test
2-22. Probe the test
2
79