TM 5-3805-248-23-1
ELECTRICAL GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0018 00
MULTIMETER USAGE - CONTINUED
NOTE
If readout will not zero properly, replace batteries and repeat zeroing procedure. If readout will not zero after
batteries have been replaced, notify your supervisor.
a.
Zero Multimeter.
(1)
Set multimeter to ON.
(2)
Select OHMS.
(3)
Select LOWEST VOLTAGE/OHMS scale.
(4)
Touch black and red probes together and check for a zero indication on digital readout.
b.
Testing for Continuity.
WARNING
Before performing a continuity test, always place battery disconnect switch in OFF position and disconnect
circuit to be tested. Failure to follow this warning may result in injury to personnel and damage to multime-
ter.
(1)
Zero multimeter.
(2)
Connect black and red probes to both terminals of circuit being tested.
(3)
Observe readout and interpret results as follows:
(a) If readout indicates any numeric value, circuit has continuity.
(b) If readout does not indicate any numeric value, or value is over the limits of the meter, circuit is open.
c.
Testing for Shorts. A short (or short circuit) occurs when two circuits that should not be connected have continu-
ity with each other. A short also occurs when a circuit that should not touch ground has continuity with ground.
WARNING
Before performing a continuity test, always place battery disconnect switch in OFF position and disconnect
circuit to be tested. Failure to follow this warning may result in injury to personnel and damage to multime-
ter.
(1)
Zero multimeter.
(2)
Connect black probe to one pin and red probe to either ground or another pin.
(3)
Observe readout and interpret results as follows:
(a) If readout indicates any numeric value above 0 (zero) but less than the meter's limits, circuits are
shorted or circuit is grounded, if testing to ground.
(b) If readout does not indicate a numeric value or value does not change when connected to circuit(s) in
question, circuits are not shorted.
(c) If readout jumps or flickers, circuits are shorted or grounded intermittently.
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