Testing of Batteries - TM-5-6350-262-14-50051

TM 5-6350-262-14/5

NAVELEX 0967-LP-466-9053

TO 31S9-4-38-1 Chg 3

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

at temperatures below 100 .(37.77 .) and three intervals

that given in the figure.

for items operating at temperatures above 100 .(37.77'C.).

Expected battery service life should be 2 to 4 years below

CAUTION

100 .(37.77 .) and 1 to 3 years above 100 .(37.77 .).

Be sure switch SI is in open or OFF

position prior to connecting battery.

d. Testing of Batteries.

WARNING

(6) Close switch S1, and after a period of 5 1

seconds note and record the voltage on the voltmeter.

The battery may generate amounts of

hydrogen gas.

Before turning the

CAUTION

POWER switch to OFF or performing any

Do not allow switch, S 1 ro remain closed

maintenance action on any operating J-

for a period exceeding 10 seconds and

SIIDS

component

containing

do not use the text fixture shown in

rechargeable battery, open the enclosure

figure 7-3 above a 10%duty cycle rate,

door and allow the unit to ventilate for a

i.e., the ratio of "off" time to "on" time

minimum of two minutes. Do not smoke

should not be less than 9: 1.

in the vicinity of the unit while opening

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

the door or ventilating.

with those given in the following table:

(1) If the battery is installed in an operating

Battery/ambient temperature

Voltage

Control Unit, observe the above warning and then place the

Above 65 . (18.33 .)

21.60V

POWER switch to OFF. Disconnect the battery leads and

55 to 65 . (12.77 to 18.33 .)

21.24V

remove the battery from the enclosure.

45 to 55 . (7.22 to 12.77 .)

20.88V

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

35 to 4S . (1.66 to 7.22 .)

20.52V

of any evidence of physical damage such as cracks in the

25 to 35 . (3.88 to 1.66 .)

20.16V

case or obvious leakage of the electrolyte. Discard if physical

15 to 25 . (-9.44 to -3.88 .)

19.80V

damage is evident. For batteries contained in an operating

5 to 15 (-15. to 9.44 .)

19.44V

component, the battery should be no more than 2-3 .(-

-5 to 5 . (-20.55 to 15 .)

19.08V

16.66 --16.11 .) above ambient temperatures. Any battery

-15 to -5 . (-26.11 to -20.55 .)

18.72V

in an operating component which is hot to the touch or which

-20 to -15 . (-28.88 to -26.11 .)

18.54V

exhibits case deformation caused by excessive heat is an

(8) Discard any battery whose voltage is below

indication that a battery, or power supply failure has occurred.

that specified in the table.

Discard the battery and verify proper power supply operating

e. Recharging Batteries with Auxiliary Battery Charger.

prior to installing and operating for an extended period of time

If it is necessary to recharge the battery utilizing a battery

with a new battery.

charger or power supply other than that in the Control Unit the

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

following procedures 'should be followed.

6625-00-02-7894) voltmeter observing proper polarity.

(1) The charging voltage must be maintained

Discard any battery whose open circuit

between 30 and 31 volts d.c.

terminal voltage is less than 18.00 volts.

(2) The charging current into the batteries must

(4) Recharge new batteries either by (1) charging

be limited below 3.000 amps either with an adjustable current

the battery in accordance with the instructions in e below or by

limit in the power supply (this is the preferred method) or by

(2) (preferred method) installing the battery in a Control Unit

placing a 50 watt resistor of between 2 and 4 ohms in series

and allowing the power supply to recharge the battery for a

with the battery. The exact value of the resistor will vary

minimum of 24 hours. After this 24 hour recharge period,

depending upon the length of time that has elapsed since the

disconnect the battery leads and remove the battery from the

battery was last charged and storage temperature.

Control Unit.

NOTE

CAUTION

The value of resistance which must be

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

used to limit the current will decrease as

enclosure door. Allow the Control Unit

the battery becomes charged. When the

free standing ventilation during this 24

battery is initially placed on charge use a

hour period.

4 ohm resistor and verify that the current

(5) After recharging connect the battery to a

is below 3.000 amps. Once the battery

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

has partially

figure 7-3. Be sure the leads to the AN/GSM-64C are

connected directly to the battery terminals as shown in the

Change 3 7-14