Polaris Virage TX 2000 Service Manual page 234

ELECTRICAL
Battery Testing
Specific Gravity Test
A tool such as the battery hydrometer can be used to measure electrolyte strength or specific gravity. As the
battery goes through the charge-discharge cycle, the electrolyte goes from a heavy (more acidic) state at full
charge to a light (more water) state when discharged. The hydrometer can measure state of charge and
differences between cells in a multi-cell battery. Readings of 1.270 or greater should be observed in a fully
charged battery. Differences of more than .025 between the lowest and highest cell readings indicate a need to
replace the battery.
Open Circuit Voltage
Specific Gravity
Detail A
*At80°F
NOTE: Subtract .01 from the specific gravity reading at 40° F.
Battery Hydrometer
PN 2870836
Load Test
A battery may indicate a full charge condition in the OCV test and the specific gravity test, but still not have the
storage capacity necessary to properly function in the electrical system. For this reason a battery capacity or load
test should be conducted whenever poor battery performance is encountered.
NOTE: This test cannot be performed with an engine or starting system that is not working properly.
1. Attach a multitester to the battery. The reading should be 12.4 volts or greater.
2. Engage electric starter and view registered battery voltage while cranking engine. Continue the test for 15
seconds. During this cranking period, the observed voltage should not drop below 9.5 volts. If the beginning
voltage is 12.4 or higher and the cranking voltage drops below 9.5 volts during the test, replace the battery.
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