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ZEROING THE SIMPSON MODEL 160 MULTIMETER
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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TESTING FOR SHORTS
TM
5-2420-224-20-1
Continuity tests are made to check for open
c i r c u i t s (breaks or disconnections) in leads,
harnesses, connectors, and switches. Follow the
instructions below to make a continuity check.
NOTE
T h e TS-352 B/U multimeter is
s h o w n in these instructions, but
the procedures are similar for any
of the multimeters.
1.
Set and zero rnultimeter for OHMS RX1.
CAUTION
The  multimeter  can  be
damaged  unless  power  is
r e m o v e d from the circuit being
tested.
Disconnect circuit being tested from its power
2.
source. To be safe, disconnect the negative
battery cables (page 2-24).
Connect multimeter probes to both terminals
3.
of circuit being tested. (See illustration.)
NOTE
All electrical circuits have a small
amount of resistance. When
testing a long cable, the needle
may not quite reach the 0 point,
even when the circuit is good.
Watch the multimeter needle for the following
4.
indications:
If needle swings to 0 on OHMS
scale, the circuit has continuity.
If needle stays at infinity
,
circuit is
open.
If needle jumps or flickers, there is a
loose connection in the circuit being
tested.
3-5

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