Serviceability Tests for Battery, Wet Primary BA-472C/U, BA-472D/U and BA-472E/U

TB 11-6135-200-25

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Figure 3-1. Insulated Test Chamber for Testing BA-472C/U or BA-472D/U.

as possible and with an ohmmeter

a. Mount the proctective connector cap (NSN 5935-

that applies less than 10 milliamperes

00-921-5061) on connector jack J541.

(ma) to the circuit. The AN/USM-223

b. Set the AN/USM-223 to the 50-volt dc range and

applies a maximum of 5.2 ma in the

measure the voltage between pins N and P. The

resistance scales, and Test Set,

potential measured must be 0 volt.

Arming Mechanism (8020264) applies

c. Using the AN/USM-223 as an ohmmeter, on the

9 ma to the circuit. DO NOT use the

R x 10,000 range, test for resistance between the battery

TS-352/U to make this measurement.

case and the exposed pins (A through H, L, N, O and P).

j. With the protective cap removed from connector

The resistance measured must be greater than 1

J541, and with Test Set, Arming Mechanism 8020264

megohm.

used as an ohmmeter, check the resistance between

d. Remove the protective cap from J541. With the

pins I and J. The resistance must be less than 9 ohms.

AN/USM-223 on the R x 10,000 range, check the

NOTE

resistance between pin I and the battery case, and

Test k and I below is to be performed

between pin J and the battery case. In each instance the

with battery temperature less than 80.

resistance must be greater than 1 megohm.

If necessary, cool battery by

e. Again mount the protective cap on connector

refrigeration (or other means) to

jack J541.

insure battery temperature is below

f. Set the AN/USM-223 to the R x 10,000 range,

80 F.

and measure the resistance between pins F and 0. The

k. With the protective cap mounted on connector

resistance must be infinity (open circuit).

K541, and with the AN/USM-223 used an an ohmmeter

g. With the AN/USM-223 on the R x 10,000 range,

on the R x 10 range, check the resistance between pins

measure the resistance between pins P and N. The

D and E. The resistance must be between 110 and 160

resistance must be infinity (open circuit).

ohms.

h. Set the AN/USM-223 to the R x 10 range and

l. Check the resistance between pins G and H.

measure the resistance between pins A and L. The

The resistance must be less than 40 ohms.

resistance must be zero (short circuit).

m. With the temperature of the battery less than 80

i. Measure the resistance between pins B and C.

°F connect the test circuit as shown in figure 5. The 6-

The resistance must be zero (short circuit).

volt indicator lamp must light (q below).

CAUTION

n. Connect the appliance plug to a 115 vac source.

Be sure to perform the test inj below

The ammeter should indicate approximately 0.8 to 0.9

as quickly

amperes (q below).

o. The 6-volt indicator lamp shall glow steadily, as

the battery temperature rises. The 6-volt indicator lamp

may