Fluke 43B
Applications Manual
14
Testing a Diode
Check a diode in both forward direction and reverse direction. Useful for
checking whether the diodes in a rectifier are still intact.
1
Open the main menu.
2
3
Select
(diode)
4
Make connections as shown below:
Observe the voltage in forward direction (
A
). It should read about 0.5V.
Now turn the diode in reverse direction (
B
) and look at the display again.
•
The Fluke 43B should display
OL
(Over Load), indicating a very high
resistance. If not, the diode is faulty and should be replaced.
OHMS
/
CONTINUITY
/
CAPACITANCE
A
B
Summary of Contents for 43B
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