MAINTENANCE
SABER (QSC) 980067 11/13/02
4-2
CHECKING BATTERY SPECIFIC GRAVITY
Use a hydrometer to check the battery specific
gravity.
CHECKING GRAVITY
A. Hydrometer
B. Battery
NOTE: Do not take readings immediately after
adding distilled water, if the water and acid are not
thoroughly mixed, the reading may not be
accurate.
Check the hydrometer readings against this chart.
SPECIFIC GRAVITY
@ 80
°
F (27
°
C)
BATTERY CONDITION
1.265
100% CHARGED
1.225
75% CHARGED
1.190
50% CHARGED
1.155
25% CHARGED
1.120
DISCHARGED
NOTE: If the readings are taken when the battery
electrolyte is any temperature other than 80
°
F
(27°C), the reading must be temperature
corrected.
To find the corrected specific gravity reading
when the temperature of the battery electrolyte is
other than 80°F (27°): Add (+) to the specific
gravity reading 0.004 (4 points), for each 10°F
(6°C) above 80° (27°C).
Subtract (-) from the specific reading 0.004 (4
points), for each 10°F (6°C) below 80°F (27°C).
Battery Check
