Figure 2-7 Forward-Biased Diode/Continuity Test Terminal Connection And Display - Agilent Technologies U3401A User's And Service Manual

2 Operations and Features
The cathode of a diode is indicated with a band.
N O TE
4 Read the display.
5 Reverse the probes and measure the voltage across the diode again

Figure 2-7 Forward-biased diode/continuity test terminal connection and display

28
(refer to Figure 2- 8). Assess the diode according to the following
guidelines:
• A diode is considered good if the multimeter displays OL in reverse
bias mode.
• A diode is considered shorted if the multimeter displays
approximately 0 V in both forward and reverse bias modes, and the
multimeter beeps continuously.
• A diode is considered open if the multimeter displays OL in both
forward and reverse bias modes.
Test current
+
Forward
bias
–
U3401A User's and Service Guide