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STEP
NOTE: Since batteries can be in widely varying states of charge, a
1
conditioning charge is the best way to make certain that the battery is
tested in a fully charged state.
Charge the battery on a well regulated constant voltage set for 13.5 to 13.8 VDC.
The charger must be capable of delivering at least 3.0 Amperes of charge current.
Charge the battery for 16 hours minimum.
2
Rest the battery for a period of 12 hours before any testing.
3
The battery terminal voltage, after the rest period, should be approximately 12.72
4
VDC to 13.02 VDC.
•
If the battery falls within the terminal voltage parameters above, there is a high
probability that it is good and discharge testing is optional.
•
If the battery terminal voltage is between 12.40 and 12.62 VDC, then the
discharge test is recommended.
•
If the terminal voltage is below 12.40 VDC after proper charging, there is a
high probability that the battery has a low discharge capacity and short life
expectancy. It is recommended, in this case, that the battery be replaced.
STEP
NOTE 1: For optimum performance or acceptance testing, a half-hour
1
capacity test is sufficient to determine the status of the battery.
NOTE 2: The half-hour discharge current rate for each SBS40 (12V/38AH)
battery is 51 Amperes.
NOTE 3: Use only approved battery discharge equipment.
Discharge the battery at the given rate to an end terminal voltage of 10.2 VDC.
The battery should run for at least 30 minutes before it reaches the end voltage.
2
If the battery does not deliver at least 30 minutes of discharge time, it should be
3
recharged and retested.
If the battery still does not meet the requirements of the 30-minute test, it should be
4
replaced.
Procedure 4. Testing the Batteries
A. Lead-Acid Battery Preparation
ACTION
B. Lead-Acid Battery Discharge Test
ACTION
17
Power Node/30
1650, Issue 1, March 2011
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