PS Magazine - MARCH 1984
PS, The Preventative Maintenance Monthly
ISSUE 376
MARCH 1984
It Takes A blend of power and precision to keep your ±N/²²C-41 telephone
centrAl And its SB³3614 switchboArds directing trAFic smoothly.
²he power? Your PU´620 generAtor set, oµ cO¶rse. PrEcision is needed to
keep delicAte circuit cArds on line.
Check Your Muscle
Be·re ¸exing your
PU-620
GENERA TOR SET
muscle, see if your con¹
nections Are tight And right.
'
²B º3»0125 shows you
the correct wiring scheme.
Here¼s how yours should look:
WiRE
jUmpER-.
PAy special Attention to grounding. ²M 11³5805³693»12 clues you in.
Remember you must mAke connections to bAre meTAl.
± poor ground gives you unreliAble power. Surges And trAnsients cAn punch
out your circuit cArds.
Ground
tight?
¼Course, you Also must mAke
sure your switchboArds And the
rig itself Are s½lidly grounded.
²hen, you¼re reAdy to operAte.
HAve your generAtor set run¹
¾
ning up to speed And smoothly
be·re Applying power to the
rig. ²he PP³622º power supply
And All other geAr inside¿
especiAlly the switchboardÀ
should be ÁÂÂ.
._
___
-\9
T.±²a;:³´µ¶·¸¹º»¼½
Set the right volTAge output
on your power supply. StArt up the biggest users Ãirst. ²hAt¼s either the Air conÄ
ditioner or heAter. ²hen, go down The line, ending wiTh thÅ smAllest power drAins.
Protect your switchboArds Æom overloAd by using A º³Amp Çse, NSN 5920³È»
557³2647, in the Éont pAnel. ±lthough the pAnel sAys "5.Ê Amp,Ë the ÌeAdÍ
shed wants you to use the smAller version.
5±
Mar 8
Get A set bAck Ãrom support? Make
sure they didn¼t slip in the bigger Çse.
When you¼re operating And chArging
bAtTeries At the sAme time, you set your
PP³622º ¼s output higher. Remember to
set it bAck when the bAtteries are
chArgeD. ²he extrA volÎge cAn burn up
cArds.
LikewÏse, if you hAve A generAtor
Ðilure, shut down the geAr inside your
²²CÑ1Ò ²urn it on AgAin only when
your PU is bAck on line.
P±actIce Card Care
Protection ·r your SB»361º circuit
cArdÓ sÎrTÔ wiTh careÇl hAndling. Keep
pins strAight by pulling And seating
cArds cAreÕlly. Use tÌe extrActor thAt
comes with your geAr. It¼s NSN
5999»01³038³6793.
Ánce you¼ve removed A cArd, hAnÄ
dle it on the edges only. ²he natÖrAl oil
Éom your skin×not to mention Any
other dirt or oil¿cAn rÖin A card.
STatic electricity is Another cArd
killer. Øven tÙAt small jolt you get when
you touch meTAl or another person is
more tÚn enough to rÖin A circuit cArd.
So, ground yourself.
You cAn often do it by holding on to
something meTAl while hAnÛling the
cArd. Ár, you cAn sTAnd on A conducÄ
tive mAt while you work.
53
-.± ·
²³
"
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