Testing of Batteries - TM-5-6350-262-14-110031

TM 5-6350-262-14/11

NAVELEX 0967-LP-466-9112

TO 31S9-4-39-1

in section e. or by (2) (preferred method) installing the

temperatures above 100'F. At the conclusion of these

battery in the correct monitor cabinet and allowing the

operating periods, the batteries should be retested in

accordance with section d. Since the batteries have not

power supply to recharge the battery for a minimum of

24 hours. After this 24 hour recharge period, disconnect

been operating in the equipment they do not require

recharging prior to test. The tests in section d should

the battery leads and remove the battery from the

monitor cabinet.

thereafter be performed at six month intervals for items

operating at temperatures below 100'F.

Expected

CAUTION

battery service life should be 2 to 4 years below 100'F.

If method (2) is used, do not close the

and I to 3 years above 100'F.

d. Testing of Batteries.

enclosure door.

Allow the monitor

cabinet free standing ventilation during

WARNING

this 24 hour period.

The battery may generate amounts of

Before turning the

(5) After recharging connect the battery to a

hydrogen gas.

switch, resistor and AN/GSM-64C voltmeter as shown in

POWER switch to OFF or performing

fig. 7-2. Be sure the leads to the AN/GSM-64C are

any maintenance action on any

connected directly to the battery terminals as shown in

operating

J-SIIDS

component

the figure. The power rating of the resistor should not be

containing a rechargeable battery, open

below that given in the figure.

the enclosure door and allow the unit to

ventilate for a minimum of two minutes.

CAUTION

Do not smoke in the vicinity of the unit

while opening the door or ventilating.

Be sure switch S is in open or OFF

position prior to connecting to battery.

(1) If the battery is installed in an operating

(6) Close switch SI, and after a period of 5:t 1

Monitor Cabinet, observe the above warning and then

seconds note and record the voltage one the voltmeter

place the POWER switch to OFF. Disconnect the

battery leads and remove the battery from the

CAUTION

enclosure.

Do not allow switch S1 to remain

(2) Visually inspect the battery. It should be free

of any evidence of physical damage such as cracks in

closed for a period exceeding 10

the case or obvious leakage of the electrolyte. Discard

seconds and do not use the test fixture

if physical damage is evident. For batteries contained in

shown in fig. 7-2 above a 10% duty

an operating component, the battery should be no more

cycle rate, i.e., the ratio of "off" time to

than 2-3F. above ambient temperatures. Any battery

"on" time should not be less than 9:1.

in an operating component which is hot to the touch or

which exhibits case deformation caused by excessive

(7) Compare the voltage obtained in step (6)

heat is an indication that a battery or power supply

with those given in the following table:

Battery/ambient temperature

Voltage

failure has occurred. Discard the battery and verify pro-

Above 65'F.

21.60V

per power supply operation prior to installing and

55' to 65'F.

21.24V

operating for an extended period of time with a new

45' to 5S'F.

20.88V

battery.

35' to 4S'F.

20.52V

(3) Connect the battery to an AN/GSM-64C

25' to 35'F.

20.16V

(FSN6625-00-02-7894) voltmeter observing proper

15' to 25'F.

19.80V

polarity. Discard any battery whose open circuit terminal

5' to 15'F.

19.44V

voltage is less than 18.00 volts.

-5' to 5'F.

19.08V

(4) Recharge new batteries either by (1)

-15' to -5'F.

18.72

charging the battery in accordance with the instructions

--20' to --15'F.

18.54V

(8) Discard any battery whose voltage is below

that specified in the table.

Change 2 7-6.1