TM 9-6140-200-14
g. Using the screw closest to the eyepiece. Again, make sure the last
adjustment to -34 degrees is clockwise.
h. Rinse the tester and recheck with distilled water.
I. Repeat the adjustment for 32 degrees if necessary. Then recheck using
the anti-freeze solution.
j. When both settings check out use a little adhesive (Item 1, Appx. C) to
hold screws in place.
k. Replace the instruction plate.
(4) Check the area around the tester window. If there is a separation between
the tester window and tester body, battery acid has deteriorated the cement
(glue) and could cause the tester to give a defective reading. Replace tester.
(5) Clean and dry tester after each use.
c. Bulb-Type (Hydrometer) Tester.
1. If the optical tester is not available, the bulb-type hydrometer tester may be
used. This tester uses a hydrometer (float) to test the battery electrolyte.
2. The specific gravity of the electrolyte solution is read directly from the float
scale, which is marked to read in units of specific gravity. A direct reading
from the float scale is correct only at 80 degrees Fahrenheit. When the
temperature of the battery solution is above or below 80 degrees, the float
reading must be corrected to obtain an accurate electrolyte specific gravity
reading. The tester is fitted with a thermometer, which reads in degrees
Fahrenheit. The thermometer is used to indicate the temperature of the battery
electrolyte solution. The following procedures describe the use of the bulb-
type tester:
WARNING
To prevent personnel injury or damage to equipment,
be careful not to drip electrolyte during battery testing
or while reading hydrometer.
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