TM 5-5420 -226-20-1
CONTINUITY
TEST.
IF NEEDLE JUMPS OR
FLICKER*
CIRCUIT HAS A
LOOSE CONNECTION.
IF NEEDLE MOVES TO
RIGHT BUT NOT TO ZERO,
THE CIRCUIT HAS
RESISTANCE. CONTINUl~
ISA
RESISTANCE OF LESS
THAN 1 OHM.
I
NEEDLE ~
Y‘Check if needle swings to far right (over green
zero mark on upper scale).
I
l Set mtdtimeter
selector switch to the scale indicated
in
your troubleshooting
procedure.
l Zero meter (page 4-33).
I
WARNING
Turn circuit power off aa required in
your troubleshooting
procedure.
4
1
\
l
l Connect meter probes to circuit under test as indkated
in your troubleshcmting
procedure.
l Observe meter needle.
Does needle swing to far right (over green zero
mark on upper scale)?
.
o
-~
n+
0’
DOTTED LINE
SHOWS
NEEDLE
POSITION
,AT FAR RIGHT
(OVER GREEN
ZERO MARK ON
UPPER SCALE)
%ELECTOR
SWITCH
L)(J
CIRCUIT UNDER TEST
Meter Indicates continuity.
Meter does not Indlcete
continuity.
/
\
TA106729
4-40
