User`s guide

2 Operation and Features
Testing Diodes
52 U3606B User’s Guide
Diode test summary
CAUTION
Disconnect circuit power and discharge all high-voltage capacitors
before checking diodes to avoid damaging the U3606B or the device
under test.
NOTE
Testi ng ti ps
• To measure forward-bias diode, connect the other end of the red test
lead to the positive terminal (anode) of the diode and the black test lead
to the negative terminal (cathode). The cathode of a diode is indicated
with a band.
• The U3606B can display diode forward bias of up to approximately
1.2 V. The forward bias of a typical diode is within the range of 0.3 V to
0.8 V.
• A diode is considered good if the multimeter displays OPEn 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 U3606B beeps
continuously.
• A diode is considered open if the multimeter displays OPEn in both
forward and reverse bias modes.
Table 2 - 8 Diode test summary
Item Description
Measurement
method
0.83 mA ± 0.2% constant current source
Audible tone • Continuous beep when level is below +50 mV DC
• Single tone for normal forward-biased diode or
semiconductor junction where 0.3 V ¤ reading ¤ 0.8 V
Input protection 1000 V
rms
on all ranges, < 0.3 A short circuit
U3606-90054_UG_EN.book Page 52 Friday, July 11, 2014 5:12 PM