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Rev.12/31/97
Percent Capacity =
actual time
rated time
x 100
8. Battery capacity can then be calculated by dividing the
actual time to reach
specified terminal voltage by the
rated time
to specified terminal voltage
and multiplying by 100.
B. Annually
B. Annually
Perform a discharge capacity test with the same set-up and equipment as in
step A above.
step A above.
C. Every Six Months
C. Every Six Months
Perform a discharge capacity test as in step A above, after the battery falls
below 90 percent of its original design capacity on the annual test. Replace
the battery as soon as possible after it falls below 80 percent of its original
design capacity rating.
the battery as soon as possible after it falls below 80 percent of its original
design capacity rating.
D. Continuity Tests
D. Continuity Tests
Continuity tests are performed on a non-routine basis, whenever the
integrity of the battery is suspect. A VRLA cell typically fails open, and
continuity through the cell is lost. This condition is not readily apparent. A
quick check is to turn off both chargers and see if the battery will accept the
load of the connected equipment. Another method is to place a test load
across the battery and see if it will accept load. If cells/modules are
connected in parallel, the load must be placed across individual
cells/modules to detect an open circuit. Contact the manufacturer if further
information is needed.
integrity of the battery is suspect. A VRLA cell typically fails open, and
continuity through the cell is lost. This condition is not readily apparent. A
quick check is to turn off both chargers and see if the battery will accept the
load of the connected equipment. Another method is to place a test load
across the battery and see if it will accept load. If cells/modules are
connected in parallel, the load must be placed across individual
cells/modules to detect an open circuit. Contact the manufacturer if further
information is needed.