Resistance Measurements - Craftsman 19741 Owner's Manual

DC/AC VOLTAGE MEASUREMENTS
WARNING: Risk of Electrocution. The probe tips may not be
long enough to contact the live parts inside some 240VAC
outlets for appliances because the contacts are recessed deep
in the outlets. As a result, the reading may show 0 volts when
the outlet actually has voltage on it. Make sure the probe tips
are touching the metal contacts inside the outlet before
assuming that no voltage is present.
CAUTION: Do not measure DC or AC voltages if a motor on
the circuit is being switched ON or OFF. Large voltage surges
may occur that can damage the meter.
1. Set the rotary function switch to the Volts/Hz/% position.
2. Insert the black test lead banana plug into the negative (COM)
jack and the red test lead banana plug into the positive
(V/Q/Temp) jack
Select AC or DC with the MODE button
Connect the test leads to the circuit under test
5. Read the voltage on the display. The display will indicate the
proper decimal point and value.
Non-Contact Voltage Detection (NCV) - "This model has a built in
NCV tester. To operate, switch dial to V-AC and hold the top
section of the clamp to the area where you would like to detect
voltage. If voltage is present, the light indicator at the top of the
Clamp meter housing will light.
WARNING: Be sure to test the NCV Detector on a known source of
AC voltage before testing. Also, when testing, if the NCV light
indicator does not light, this does not mean that Voltage is not
present. Bb cautious and re-confirm with the test leads to measure
voltage.
12
RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect all power to the
unit under test, remove the batteries, unplug the line cords and
discharge all capacitors before taking any resistance
measurements.
le
2.
4.
Set the function switch to the Q + °))) CAP position.
Insert the black test lead banana plug into the negative (COM)
jack and the red test lead banana plug into the positive
(V/Q/Temp) jack
Touch the test probe tips across the circuit or part under test. It
is best to disconnect one side of the part under test so the rest
of the circuit will not interfere with the resistance reading
Read the resistance in the display
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity
on circuits or wires that have voltage on them.
Set the function switch to the Q Pt *))) CAP position.
Push the mode button to indicate ¢))) on the display.
Insert the black lead banana plug into the negative (COM) jack
Insert the red test lead banana plug into the positive (VQ) jack.
Touch the test probe tips to the circuit or wire you wish to
check.
If the resistance is less than approximately 150Q, the audible
signal will sound. If the circuit is open, the display will indicate
Olea
13