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SAFT AMERICA INC.
COMPONENT MAINTENANCE MANUAL
4579
24-31-05
PAGE 103
Jan 30/98
3.
Testing
A.
Test Conditions
(1)
Facilities and equipment
CAUTION:
FUMES FROM LEAD ACID BATTERIES OR SMALL
TRACES OF SULFURIC ACID ENTERING A NI-CD
BATTERY CAN CAUSE PERMANENT DAMAGE.
(a)
Service facilities for Ni-Cd batteries must be entirely separate from
those for lead acid batteries.
(b)
Equipment used to service lead acid batteries must not be used to
maintain Ni-Cd batteries.
(2)
For optimum results, conduct all tests with the battery temperature at 77°F
(25
°
C).
B.
Test Equipment
Refer to Section 9 (Special Tools, Fixtures, and Equipment) for a complete list of all
test equipment required for proper maintenance of a Ni-Cd battery.
C.
Initial Discharge (Capacity Test)
The purpose of this discharge procedure is to determine the initial capacity of a
battery when it is removed from the aircraft, either for routine maintenance or for
investigation of a malfunction. The test also is used in the commissioning of a new
battery to verify performance before being entered into service. The results of this
initial discharge will determine the steps that should be taken.
(1)
Discharge the battery at a rate listed in Figure 103 until the battery reaches
20.0 V.
(2)
Record the time at the start of the discharge and the discharge current.
(3)
Monitor individual cell voltages periodically during the discharge.
(4)
Record the time that the first cell reaches 1.0 V.
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