CHAPTER 2 SPECIFIC DATA FOR BB-542/U BATTERY

TM 11-6140-224-13&P

CHAPTER 2

SPECIFIC DATA FOR BB-542/U BATTERY

2-1.

Tabulated Data for BB-5421U

Type ........................................................................................................ Nickel-Cadmium (sealed)

Number of cells ........................................................................................... 20

Electrolyte.................................................................................................... Potassium hydroxide (KOH)

Operating Range:

Temperature ................................................................................... -25F (-32C) to 125F (520C)

Atmospheric Pressure .................................................................... Sea level to 100,000 feet

Storage:

Duration (maximum) ....................................................................... Unlimited, regardless of state of charge

Temperature ................................................................................... -80F (-62.20C) to 125F (520C)

Atmospheric Pressure ................................................................... Sea level to 100,000 feet

Electrical Data:

Rated 1-hour discharge capacity at temperature of:

Approximately 75F(23.90C) .................................................. 2.0 ampere-hours at 24 volts

Approximately OF(-17.8C) .................................................... 1.2 ampere-hours at 24 volts

Approximately-25F (32C) .................................................... 0.5 ampere-hours at 24 volts

Current at Temperature:

Approximately 75F (23.90C) ........................................................ 10 amperes for 8 minutes at 23 volts 400

milliamperes for 5 hours at 24 volts

Approximately 25F(32C)

2.0 amperes for 15 minutes above 20 volts,

400 milliamperes for 3.3 hours at 24 volts

Voltage:

Open circuit .................................................................................... Approximately 26 volts (fully charged with a

24-hour rest period)

Minimum life cycle (charge and discharge) ................................................. 500 cycles

Weight ........................................................................................................ 7 pounds maximum

Size

........................................................................................................ 2.56 inches high, 12.2 inches long, and 4.0 in-

ches wide

2-2.

Characteristics with Outstation Equipment

The service time obtainable (before recharge) from the BB-542/U is a function of the specific radio equipment. Typical

capabilities at 700F are given below:

USE MODE

TYPICAL SERVICE TIMES

EQUIPMENT

AN/PSC-1(LOS)

Intermittent-Receive 40 min/day

AN/PRC-70

AN/PSC-1(SAT)

and Transmit 1 min/week

10 days

or Transmit 2 min/day

5 days

7 days

Continuous 1/9 Transmit/Receive

2-1/4 hr

2-3/4 hr

4-3/4 hr

Continuous Receive

8 hours

7 hours

Continuous Transmit

15 minutes

20 minutes

66 minutes

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