Performing Diode Measurement - Keysight U1211A Guía Del Usuario Y Servicios

Performing Diode Measurement

Disconnect circuit power and discharge all high-voltage capacitors before
CAUTION
testing diodes to avoid damaging the clamp meter.
Steps (see
1 Set the rotary switch to
2 Connect the red and black test leads to input terminals
3 Probe the test points and read the display.
This clamp meter can display diode forward bias of up to approximately 2.1 V.
NOTE
The forward bias of a typical diode is within the range of 0.3 V to 0.8 V.
4 Reverse the probes and measure the voltage across the diode again (see
Keysight U1211A, U1212A, and U1213A User's and Service Guide
Figure 2-5 on page 44):
range mode was enabled).
(black) respectively.
Figure 2-6 on page 45). Assess the diode according to the following
guidelines:
– A diode is considered good if the clamp meter displays "OL" in reverse bias
mode.
– A diode is considered shorted if the clamp meter displays approximately 0 V
in both forward and reverse bias modes, and the clamp meter beeps
continuously.
– A diode is considered open if the clamp meter displays "OL" in both forward
and reverse bias modes.
. The auto range mode will be disabled (if the auto
Making Measurements
(red) and COM
2
43