Battery Case Vent

TM 11-6140-203-14-4&P

2. Outer element: 2.8-3.0 ohms.

cadmium battery since the charge will be lost through

3. Combined 2.2-2.4 ohms.

normal leakage and it will be deep-cycle discharged and

recharged prior to returning to service. Protect from

(b) Power consumption: 365 watts at 29

freezing and excessive heat.

volts dc.

(4) When the nickel-cadmium battery is to be

If very high

returned to service, perform the full quarterly procedure

resistances are measured directly across the heating

contained in paragraph 5-6.

elements then it is an indication that a heater element is

(b) Hold-Ready Administrative Storage

defective and must be replaced.

Procedures. The following procedure applies when a

nickel-cadmium battery is placed in a hold-ready

5-14.

Battery Case Vent

administrative storage while the end item of equipment

For BB-693A/U batteries equipped with a cover that

is in the repair or overhaul process.

contains manual vents, only one automatic valve that

(1) Remove the nickel-cadmium battery from

releases pressure from within the case is required. The

the equipment.

specified valve is 3.0 t0.6 psig.

(2) Perform those quarterly maintenance

procedures covered by paragraphs 5-6a through f.

5-15.

Administrative Storage of Nickel Cadmium

(3) Perform capacity discharge test of

Batteries

paragraph 5-6g if battery provides required service time.

Nickel-cadmium batteries can be placed in administrative

Deep discharge in accordance with paragraph 5-6c

storage because of no immediate operational need and

except the minimum shorting time shall be only 8 hours.

the necessity to reduce the maintenance workload; or to

Connect shorting spring across battery terminal J2 and

hold it ready while the associated end item of equipment

remove individual cell shorting device.

is in the repair or overhaul process or for temporary

(4) Place the nickel-cadmium battery in the

excess quantities of direct exchange batteries. The

ready-hold administrative storage area. Protect from

nickel-cadmium battery is handled differently under each

freezing and excess heat.

set of circumstances.

(5) When the nickel-cadmium battery is

a Normal Administrative Storage Procedures The

required for installation in the repaired or overhauled

following procedure applies when a nickel cadmium

end item of equipment, remove it from administrative

battery is being placed in normal administrative storage.

storage. Remove the shorting device from across the

(1) Remove the nickel-cadmium battery from

terminals of the battery.

the end item of equipment.

(6) Charge the nickel-cadmium battery in

(2) Perform the cleaning procedures in

accordance with the instructions contained in paragraph

paragraph 4-13.

5-4f The countdown to the next quarterly service interval

(3) Place the nickel-cadmium battery in the

will start at this point in time.

administrative storage area making sure that the

(7) Install the nickel-cadmium battery in the

connector terminals are not accidentally short circuited.

end item equipment.

It is not necessary to discharge the nickel

5-20