PS Magazine - TB 43-PS-454
PS, The Preventative Maintenance Monthly
ISSUE 454
SEPTEMBER 1990
ANnVS2 Night Visio± Viewer .².
Fo
o
C
h
g
e
WAIT/
••
i PON't NEeD
While you're setTing up ±He cHaRt
±Y GAS²³
·
'
±
´µJUs1¶
make suRe you Have eNough ²ght fOR
ovr ·F
±his tesT. A quick check is To stand a± the
FOv³ !
FoNt of ±he ±arge± and Look down a±
efore
you
youR
A³/VVS-2 NighT vIsioN vIewer, makE
the ´cus TesT. µt cou¶d be THa± your
vieweR is just ouT of ·cus and you
won¸T neeD ±o speND TIme tRouBleshoot¹
iNg. ºut the focus TesT»s Not ¼N ½M
¸¹-5855º249»¸0.
H¼R¼½¾ h¿w y¿u d¿ ÀÁ:
AdJusT the A³/VVS¾¿ gain To THe
oUtside
lIgHt
¶eve¶ positioNÀ ÁHeNÂ
make THe ÃOcus test ¶iKe so:
STP
I
ÄSet the Resolu±Ion chaÅT on
a Ænce oR wa¶l in ±he mo±oR poo¶ or
uNi± area where you can posItIon THe
sys±em
50
ÃÇe± ÈÉom The targeTÀ Êe sure
your shoesË µf you caN see tHe out¶iNe of
youR shoesÌ you have enougH ¶igh± ±o
Do the tesTÍ µf you caN¸T see your shoesÌ
get someone ±o shINe a ζash¶ight oN
±he ±arge± whi¶e you do the focus testÏ
stEp
´
еf The reso¶utioN paT±eÑ Is
cleaR aNd focuseDÒ ±He systemÓs
ÂKÃ
µÔ the reso¶utIon cHÕRt is not cleaRÖ
make suRe tHe en±rance wIndow is clean
anD dry. µÎ ±He image is sti¶¶ not c¶ear×
senD ±He assemBly to ØS maIn±enaNceÙ
ANO±H Can
ÁM
Äĺ5855»2Å9»2Æ
Úeaves ouT an
impoRtant part of ±he unit preven±Ive
maiNteNance cHecks anD serÛicesË ÁHe
aÇÈÉÊË
Üight vIsion viewer needs
To
b
purged annua¶¶yË
You also NeeD to geT the vIewer
purgeD when you Notice moisture or
coNdeNsation In the viewINg lens or
HeaD assemB¶yÙ Make a No±e uNtiL ±he
ÁM is updateDË
THe taRget»s noT TilTeDÙ
²
44
³´-µ2
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