Installation Instructions
81700·82100·82400 WSM, 11770
9
ELECTRICAL
SYSTEM
At
an
electrolyte
tern
perature
of
20°C (68
OF)
C022F006
Specific
Gravity
1.260
Sp.
Gr.
1.230
Sp.
Gr.
1.200
Sp.
Gr.
1.170
Sp.
Gr.
1.140Sp.Gr.
1.110
Sp.
Gr.
State
of
Charge
100
% Charged
75
% Charged
50
% Charged
25
% Charged
Very
Little
Useful Capacity
Discharged
Battery Specific Gravity
A CAUTION
• Keep electrolyte away from eyes, hands and clothes.
If
you
are spattered
with
it,
wash
it
away completely
with
water.
1.
Check
the specific gravity
of
the electrolyte in each cell
with
a
hydrometer.
2.
When the electrolyte temperature differs from
that
at
which
the hydrometer
was
calibrated, correct
the
specific gravity
reading
following
the
formula
mentioned in (Reference)
below.
3.
If
the specific gravity
is
less
than
1.215
(after
it
is
corrected
for
temperature), charge or replace the battery.
4.
If
the specific gravity differs between any
two
cells by more
than 0.05, replace the battery.
III
NOTE
• Hold
the
hydrometer tube vertical
without
removing
it
from
the
electrolyte.
• Do
not
suck
too
much electrolyte
into
the tube.
•
Allow
the
float
to
more freely and hold
the
hydrometer
at
eye level.
• The
hydrometer
reading must
be
taken
at
the
highest
electrolyte level.
(Reference)
• Specific gravity slightly varies
with
temperature.
To
be
exact,
the
specific gravity
decreases
by
0.0007
with
an
increase
of
1
°C
(0.0004
with
an
increase
of
1
oF)
in temperature, and
increases by 0.0007
with
a
decreases
of
1
°C
(0.0004
with
a
decrease
of
1°F).
Therefore, using 20°C
(68
OF)
as
a reference,
the
specific
gravity reading must
be
corrected
by
the
following
formula:
• Specific gravity at 20°C = Measured value + 0.0007 x
(electrolyte temperature -
20
0c)
• Specific gravity at 68
OF
= Measured value + 0.0004 x
(electrolyte temperature - 68
OF)
9-S5