PS Magazine - JULY 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 248
JULY 1973
"
RESISTANCE MEASUREMENTS:
1.
Turn offor disconnect the poweR
From the cIrCu it or item to be
MeasureD. ±f you're working On a
peIcE of equIpment hAvIng
12-
o²
28-
Volt ChArGing system, d³sconnect the
BAtte´ ground caBleµ
2.
Set the seleCtor sW-¶ch On
·H¸Sµ ¹f yºu Don't know the ohms
rAting» set t¼e switch on
X1
½Kµ
3±
¾onnect the prod¿ ac²oss thE
Item to Be Checked. Then turn the
sELeCto² ¿witCh cOUntErCLockwisE
until t¼e needle centeÀ ON the ¿CaLEÁ
4²
Âoà "zerOÄ thE MEtErµ TOUCh
Å
the
2
prODs tOGEthErµ ÆhilE thEY'rE
tOgEthErÇ tU²N thE ½ÈÉÊ ËÌJ kNOB
UNtiL thE NeEdLE ¿EttLE¿ ²iGht OVEr"½Í
thAt's ON the tOP ¿CÎLEµ
IF 'OU DoN³T
ZER´ µ¶ur
mei1±
ALl
YOur
·adin5
W²LL
Be
Fal?³.
S¸
fo´µOw
tH¹º
P¶oc·D¸¹º»
60
»¼
ÏONNECt thE tE¿t PrOD¿ ÎC²O¿¿
thE ³tEM O² C³²CU³t tO BE MEοU²ED
ÎND ²EÎD thE VaLUE ON tÐE tOP ¿CÎLEÑ
ÌON't FO²GEt tO MULt³PLY thE ²EÎD³NG
BY thE
"x½
¿Ett³NG F³GU²EÒ
¾¿
ÓVEÔ t³ME thE ¿ELECtO² ¿Ã³tCh
³¿ ¿Et ON ÎNOtÐE² ½ÈÉÊ
Àx½
¿Ett³NGÇ
²EPEÎt tÐE zE²O ÎDjU¿tµ
7Á
ÆhEN MEοU²³NG ²E¿³¿tÎNCE OF
t²ÎN¿³¿tO² C³rCU³t¿ U¿E thE
xÂ, xÃÄ
ÎND
xÅÄÄ
¿Ett³NG¿ ONLYµ Th³¿'LL L³M³t
thE MEtE²'¿ POÃE² ¿UPpLY tO
1Æ»
VOLt¿µ
ÕÐE гGÐE² ¿Ett³NG¿ pUt
22Æ»
VOLt¿ ³N
thE MEtE² Ci²CUit ÎND th³¿ CÎN BLOÃ
t²ÎN¿³¿tO²¿ O² ÖLÖ×t²OLYt³C ×ÎPÎC³tO²¿
ÎND YOU MU¿t MγNtγN ÉÓÕØÙ
ÚÛÕÕÓÙÜ POÝβ³tYµ
ÕO MγNtγN ÉÓTÓÙ ÚÛTÕÓÙÜ ÞOLβ³tY
DU²iNG ²Ö¿³¿tÎNCE ÎND CONt³NU³tY
×ÐÖCß¿ ON ÎLtE²NÎtO²¿ ÎND ¿OL³D ¿tÎtE
C³²×U³t¿ U¿Ö tàE ÙÓÌ P²OBE ο NEGÎá
t³VE (â) ÎND tÐE ÚãÛÏä P²OBE ο PO¿³å
t³VE (+)µæÐY? ÚECÎU¿E tÐE ÙÓÌ LEÎD
³¿ CONNECtED tO tÐE (ç) ¿³DE OF tÐE
MEtE²è¿ BÎttE²³E¿éÎND tÐE ÚãÛÏä LEÎD
tO tÐE ( +) ¿³DÖÒ
ÚãÛÏK
6Ç
+
®
ÙÓÌ
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