Diode Test; Frequency And Duty Cycle Measurements - Craftsman 82139 Owner's Manual

DIODE TEST
I ARNING: To avoid electric shock, do not test any diode that has
voltage on it.
1. Set the function switch to-_-))_)position.
2. Press the -)1--))_) button until the _ symbol appears in
the display.
3. Insert the black test lead banana plug into the negative
(-) jack (COM) and the red test lead banana plug into
the positive (+) jack (_-.)).
4. Touch the test probe tips to the diode or
semiconductor junction you wish to test. Note the
meter reading.
5. Reverse the probe polarity by switching probe position. Note this
reading.
6. The diode or junction can be evaluated as follows:
A. If one reading shows a value and the other reading shows OL, the
diode is good.
B. If both readings show OL, the device is open.
C. If both readings are very small or 0, the device is shorted.
NOTE: The value indicated in the display during the diode check is the
forward voltage.
FREQUENCY or DUTY CYCLE MEASUREMENTS
1. Set the function switch to the FREQ position.
2. Insert the black test lead banana plug into the
negative (-) jack (COM) and the red test lead banana
plug into the positive (+) jack (F).
3. Press the Hz/% key to select "Hz" or "%".
4. Touch the test probe tips to the circuit under test.
5. Read the frequency or duty cycle in the display. The
digital reading will indicate the proper decimal point,
symbols (Hz, kHz) and value.
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