10.30
ELECTRICAL
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
OCV - Open Circuit Voltage Test
Battery volt age sho uld be checked with a digital
multitester. Readings of 12.6 volts or less require further
battery testing and charging. See the following chart and
“Load Test”.
NOTE: Use a volt/ohm meter to test battery voltage.
Load Test
A battery may indicate a full charge condition in the OCV
test, but still may not have the storage capacity necessary
to pr operly function in the e lectrical s ystem. F or t his
reason, a ba ttery cap acity or lo ad test sho uld be
conducted whenever po or batter y pe rformance is
encountered.
To perform this test, use a loa
d testing device that has an
adjustable load. Apply a load of three times the ampere-
hour rating. At 14 seconds in to the te st, che ck battery
voltage. A good 12V battery will have at least 10.5 volts.
If the reading is low, charge the battery and retest.
Specific Gravity Test
A tool such as a Battery Hydrometer (PN 2870836) can be
used to measure electrolyte strength or sp ecific 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 s hould b e observed in a f ully ch arged ba ttery.
Differences o f mo re th an .0 25 b etween th e lowest an d
highest ce ll r eadings indicate a n eed to r eplace the
battery.
NOTE: Lead-acid batteries should be kept at or near
a full
charge as possible. Electrolyte level should be
kept between the low and full marks. If the battery is
stored or us ed in a pa rtially c harged c ondition, or
with low electrolyte levels, hard crystal sulfation will
form on the plat es, re ducing t he ef ficiency a nd
service life of the battery.
Battery PN 4012622
OPEN CIRCUIT VOLTAGE
State of Charge Maintenance Free
100% 12.7 V and up
75% Charged 12.5 V
50% Charged 12.2 V
25% Charged 12.0 V
0% Charged 11.9 V or l ess
To prevent shock or component damage, remove spark
plug high tension leads and connect securely to
engine ground before proceeding.
SPECIFIC GRAVITY
State of Charge* YuMicron™ Type
100% Charged 1.275
75% Charged 1.225
50% Charged 1.175
25% Charged 1.135
0% Charged 1.115 or less
* At 80° F. NOTE: Su
btract .01 from the specific
gravity reading at 40° F.
Battery Hydrometer
(PN 2870836)
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