Figs. 1,080 to 1,084—Acid hydrometers for liquids heavier than water. Fig. 1,080, standard storage battery hydrometer with guiding points designed for "hydrometer syringe," shot bulb, with red line at 25 Baumé, 5 inches long, double scale 10 to 40 Baumé, 1.050 to 1.400 specific gravity. Fig. 1,081, plain hydrometer with shot bulb, 5 inches long, double scale 10 to 40 Baumé, 1.050 to 1.400 specific gravity. Figs. 1,082 and 1,083, hydrometer with small flat bulb, used in car lighting batteries, shot bulb, 4½ inches long, single scale, reading from 1.100 to 1.250 specific gravity. Fig. 1,084 jar for hydrometers.
Ques. How should the cells be filled?
Ans. Enough of the electrolyte should be poured into the jars to completely cover the plates, or to within about a half inch of the top edge of the jar. Large cells should be filled by means of an acid proof pump and rubber hose.
Ques. What change takes place after filling the jars?
Ans. The specific gravity of the electrolyte will fall considerably, but will rise again when the battery is charged.
Ques. What may be said with respect to the density of the electrolyte?
Ans. It should never exceed 1.200 when the battery is fully charged.
Ques. How much electrolyte is used per 100 ampere hours battery capacity, on an 8 hour rating?