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11.5 BATTERY & ELECTRICAL SYSTEMS 11 BATTERY TESTING Testing Procedures Batteries should be kept at or as near full charge as possible. If Open Circuit Voltage Test (OCV) Check static battery voltage with multimeter. Voltage should be Load Test A battery may pass the OCV test, but still not have the storage 1. Connect multimeter to the battery as if performing the 2. Turn the engine over using the electric starter. 3. Replace battery if Vdc drops below 9.5Vdc. NOTE: Battery load test tools can be purchased Specific Gravity Test (Conventional Battery) NOTE: Do not attempt to open the vent cover on a A battery hydrometer (PN 2870836) can be used to measure Off Season Storage To prevent battery damage during extended periods of non-use, 1. Remove battery from machine and wash the case and 2. Using a wire brush or knife, remove any corrosion from the 3. Charge at a rate no greater than 1/10 of the battery's amp/ 4. Store the battery in a cool, dry place. NOTE: Stored batteries lose their charge at the rate higher temperatures as the battery discharges. Battery Voltage STATE OF CHARGE CONVENTIONAL LEAD-ACID YUMACRON TYPE 100% CHARGED 12.60v 12.70v 75% CHARGED 12.40v 12.50v 50% CHARGED 12.10v 12.20v 25% CHARGED 11.90v 12.00v 0% CHARGED < 11.80v < 11.90v Battery Voltage Per Cell STATE OF CHARGE CONVENTIONAL LEAD-ACID YUMACRON TYPE 100% CHARGED 1.265v 1.275v 75% CHARGED 1.210v 1.225v 50% CHARGED 1.160v 1.175v 25% CHARGED 1.120v 1.135v 0% CHARGED < 1.100v < 1.115v CAUTION D O
NOT
ALLOW
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THE
BAKING
SODA
SOLUTION
TO
ENTER
THE
BATTERY
OR
THE
ACID
WILL
BE
NEUTRALIZED . Specific Gravity Freezing Point Specific Gravity of Electrolyte Freezing Point 1.265 -75_F (-59_C) 1.225 -35_F (-37_C) 1.200 -17_F (-27_C) 1.150 5_F (-15_C) 1.100 18_F (-8_C) 1.050 27_F (-3_C) |