PS Magazine - OCTOBER 1979
PS, The Preventative Maintenance Monthly
ISSUE 323
OCTOBER 1979
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You can't see "state of charge±-except with your battery tesTeR. Even if you
look inside your battery, all you see is eLectroLyte²and it LooKs lik³ plain Water.
Water
SulfirIc ac±d
²t
staRs
lIke
thIs,
but.
.³
L g
³³³ Then
IT's up
To
you!
Q
D
E
´ctrolyte in a fULly charGµD batter¶ is aBoUt one·Fourth sulfUric a¸d¹ As your
ºatter¶ discharGes»Puts out electricit¶²chemical action Cts do¼n on the
PercentaGe o½ aciD¾ ¿hen, ¼hen the battery's recharged b¶ your
generator/alternator, chemical action is reVerseD»and the acid comes ºack¹
NoÀ you s´e the Picture o½ your dead batter¶-lo¼ acid, low charge, low
Po¼er¹
Á
It ¼oulDn't hurt to check ¶our ºatte
r
state of charge at least once a week
¼h´n cold' s Ã0t ¶ou runin' ragged¹ You'Ve got enough other probLems, so why
l´t batter¶ failure aDd toÄyour miserÅÆ
HAUL OuI Yo±R
B1ry "eS²
I
Nsn 6³´0-µ0¶i·¸¹4º8,
»¼ ½¾¿À ÁÂÃ Ä CÅMmÆÇ
ÈhÉP ÊQËpÌÍÎT:Ï
ÐÑÒ Ót'lÔ ÕÖ×Ø ÙÚÛ ÜÝ
ÞßàcáFâã GaVäåæ çf èé
êëìíîïÚðñò óô õö÷ø
ùúûüýþÿýĀ āĂă
Specific Gravlty'
ÇÈid weighs more than wate_rÉ
ĄąĆ
eleÊtrolyte-acid and water together-is
·
HeaËÌ´r tÍan plain waterÎ
Ï
Ðhen Ñou cheÒck tÓe speÔific graviÕ of battÖ
R
ele×troLØtÙ, yOu're just seeing
hÚw mucÛ it ¼eighs¹ Ühe specific gravity
Ý
of electrÞl¶te in a fßLLyàchargeáâ
batteãy is
ć2ĈĉĊ
Ühis means the elecärol
å
te weighs
ċČ2Ĉĉ
times as much as pLain
æ
waterç
ès your batteéy discharges, the eLe<trêlyte gets weaker-less acid¹
ëatteéy electìÌcal power gets weaker, too¹ íhen the specific graviî drops
ï
too far, batðery ñower's nòt strong enoUgh-and woó't last long enough-to
get yoUr engine started¹
±
´ester shows the
weIghT of eLectrolyTe .
..
·µWeAk
g
1.300-
±
²
D
=
F
³
´
µ
250¶
·
A
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²
1
-
R
³
¸
´¹200º
R
´
E
µ
c
1»150¼
½¾:¿À
ÁÂÃÄÅ,
ÆÇÈÉ"
¶
¸ ¹º
_,»¼'J
½¾
¿
ÀÁ
Â
Ã
•f
¶³ ; compared to
plA¸N ¹atEr
º»Trong
¼½¾¿ÀÁÂÃÄÅÆLectroLyte
Is
ÇÈeavÉer thanÊ
ËaTÌrÍ WHen It
Ä
-És
1280
t±mes
As heAvy, Ét
Î
És saId to be
"L.280
specIFIc gravÉty"
čĎďĐKđĐg
TEMPeRATUre
80° F
8±°F
so° f
Ē3
Sp²CIFiCGraV³TY
ďbēĔđĕĖ
1.28± {´ulL
ChAR±E)
!µ%
Å
¶;225 {H·l¸
²h³´µE¶
46%
¹º¹8±
{Đ
·¸
»L
ė
dIs¹H³º»ED¼
½
¼½¾8± (´ull
¿
chÀ»gÁ)
ÂÃÄ
ÅÆÇ_Ã {HÈlÉchÀÊÁË
3Ç%
ÌͶ8±
ĘĐ
E³´
L
v
DIs¾h³¿ÀEDÁ
¶ÂÎ
Ï-Ç8± ÐÑÒlÓ
¾h³´±ÂÃ
4
Ì:Ç25 ÔÕl¸
¾hÄ´±E¶
ÇÖ %
ę
1×±
(Đ
E³
»
Ěě
ÅÆs¾h³´µEDÇ
9%
L
i
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-=
±²³±±±´µ·'¶
¸¹
º»¼
½
¾
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ÂÃÃ
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