l the cells with acid of such a Specific
gravity that the electrolyte, at the end of charge, will need very
little adjusting to bring it to the proper specific gravity.
1.300 specific gravity acid has been found to be approximately correct
for this purpose. However, if after several batteries have been
prepared for service using 1.300 specific gravity acid, considerable
adjusting at the end of charge is necessary, it is permissible to use
a slightly different specific gravity of filling acid, but the use of
acid above 1.325 specific gravity or below 1,250 specific gravity is
not recommended.
3. Allow batteries to stand after filling for from two to three hours
before putting on charge.
4. Put on charge at finish charge rate shown on name plate of battery.
Note: If temperature of electrolyte in battery reaches 100 degrees
Fahrenheit (determined by inserting special thermometer through vent
hole in cover), the charging rate should be immediately reduced, as
continued charging at a temperature above 100 degrees Fahrenheit is
injurious to both separators and plates.
5. Continue charging until all cells are gassing freely and individual
cell voltage and specific gravity of electrolyte have shown no
decided rise for a period of five hours.
Note: The length of time required to completely charge a new battery
depends largely upon the time the battery has been in stock, varying
from twelve to twenty-four hours for a comparatively fresh battery to
four or five days for a battery six months or more old.
6. Keep level of electrolyte above tops of separators at all times,
while charging by adding distilled water to replace that lost by
evaporation.
7. After battery is completely charged the specific gravity of
electrolyte in all cells should be adjusted to 1.285 at 70 degrees
Fahrenheit, and the level of electrolyte adjusted so that after
battery is taken off charge the height of electrolyte stands 1/8 inch
above tops of connecting straps.
Note: Corrections for temperature if temperature of electrolyte is
above or below 70 degrees Fahrenheit the correction is one point of
gravity for each three degrees of temperature. See page 65.
If specific gravity of electrolyte is above 1.285, a portion of the
electrolyte should be removed and replaced with distilled water.
If the specific gravity is below 1.285, a portion of electrolyte
should be removed and replaced with 1.400 specific gravity sulphuric
acid. Acid of h
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