(5) Measure specific gravity. Use the optical battery/antifreeze
tester "duocheck" (Figure 24), when measuring the specific gravity of a
battery. This tester is quick, accurate, and reliable. There is no guesswork
or arithmetic involved and the tester will automatically adjust for
temperature.
Figure 24. Optical/Antifreeze Tester (Duodeck).
(a) Before using the duocheck tester, clean and dry the plastic
cover and measuring window. Wipe each piece clean with a soft cloth (Figure 2
5). Clean the eyepiece lens. Clean water can be used to clean any dirty areas
if it is needed.
Figure 25. Cleaning the Tester.
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