Radio Shack 22-168A - Checking Diodes

Notes:
© If the measured resistance value exceeds the
maximum value of the range selected, OL ap-
pears and the bargraph flashes. This indicates
an overload. Select a higher range. In this
mode, the beeper does not sound.
When you short the test probes in the 200
OHM range, your meter displays a small value
(no more than 0.3 ohms). This value is due
to your meter’s and test lead’s internal
resistance. Make a note of this value and sub-
tract it from small resistance measurements
for better accuracy.
For resistance of about 1 Megohm and above,
the display might take a few seconds to
stabilize. This is normal for high-resistance
readings.
CHECKING DIODES
This function lets you check diodes and other
semiconductors for opens and shorts. It also lets
you determine the forward voltage for diddes.
You can use this function when you need to
match diodes.
1. Plug the black probe into your meter’s COM
terminal and the red probe into your meter’s
V/Q. terminal.
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