PS Magazine - JULY 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 248
JULY 1973
USING THE .±²
One of the several multimeters
commonly used by organizational
mechanics and repairmen is the
An/uRM-105³
Since much of today's equipment -
Has some electric or electronic cir±
cuits, the use of a multimeter is
almost a must to ruN dowN Bad wir²
iNg or circuits.
The sight of
a
multimeter gives some mechanics the
j
itters.
³o sWeat.
You don't have to be a genius to use one. They're simple instruments,
but you do have to be careFul-especially
if
you±re measuring high voltages.
Here're the A²B-C's on using the
A³/URM´105
multimeter .
..
54
Be³re using the
URMµ105¶
check its batteries. If they´re weak your
reading will not be true. To check.
1. Set the switch to OHMS
Xl.
2. Touc± the tIps of bot± test prods;
the neeDle should swIng to t±e rIght²
3. Turn OHMS A³J completely cLock-
wise´ The needle should go to "Oµ
or beyond on the ohms (top) sCale.
±²
¶f the needle does not go aLL
the w·y to the rIght, the 2 BA¸58/U¹
1.5¸volt
batterIes
(FSN
6º35¸
120»1030) need changing.
5. ¼ow switch to OH½S
Xl
K; keep
the prod tIps together ·nd the O¾MS
A³J knob turned co¿pletely cLockÀ
wise.
6. The needle should ag·In go to
the extreme right.
¶Á Is doesn't t±e ÃA»261/U 22.5¸
volt battery (FSN 6º35¸º60¸7159)
needs ChangIng.
55
XI
ÄÅR º.ÆV
ÃATTERY
ÇHEÇK
X¶K ÄÅR
22.ÆV
ÃATTERY
ÇHEÇK
-³´µ¶·¸¹º»¼½¾¿ÀÁÂÃ
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