Section I. IDENTIFICATION AND DESCRIPTION

*TB 11-6625-678-35

Section I. IDENTIFICATION AND DESCRIPTION

1-1. Test Instrument Identification.

This bulletin

designated with (R).

provides instructions for the calibration of Charger

Battery Analyzer AN/ASM-137 and AN/ASM-137A,

1-3.

Calibration Description.

Test Instrument

hereafter referred to as Test Instruments.

parameters and performance specifications which

a. Model Variations. There are slight differences in

pertain to this calibration are listed in table 1-1.

physical and electrical components but these differences

do not affect the calibration.

Table 1-1. Calibration Description

b. Time and Technique. The time required for this

calibration is approximately four hours, using the dc-low

Test Instrument parameters

Performance specification

frequency technique.

Power put requirements

115 volts ac, 60 Hz, single phase

Charging characteristics

Type

Pulsing constant current

1-2. Calibration Data Card, DA Form 2416.

Rate

4 hours (nickle-cadmium batteries)

a. Forms, records, and reports required for

Voltage range

0 to 40 volts dc ± 2-

calibration personnel at all levels are prescribed by TM

Current range

0 to 20 amperes dc ± 2%

38-750.

DA Form 2416 must be annotated in

accordance with TM 38-750 for each calibration

*During the performance of this calibration monitor

performed.

the input voltage. Do not allow this voltage to drift

b. Adjustments to be reported on DA Form 2416

beyond 2%. Do not attempt to vary power transformer to

are designated (R) at the end of the sentence in which

check Test Instrument at 105-125 vac operation.

they appear. Report only those adjustments made and

Section II. EQUIPMENT

REQUIREMENTS

2-1. Equipment Required. Table 2-1 identifies the

meet or exceed the minimum use specifications listed in

specific equipment used in this calibration procedure.

table 2-1.

This equipment is issued with secondary transfer

Standards Calibration Set AN/GSM-256 and electronic

2-2. Accessories Required. The accessories listed in

maintenance shop sets and is to be used in performing

table 2-2 are issued with secondary transfer Standards

this procedure. Alternate items may be used by the

Calibration

Set

AN/GSM-256

and

electronic

calibrating activity when the equipment listed in table 2-1

maintenance shop sets and are to be used in this

is not available. The items selected must be verified to

calibration procedure. When necessary, these items

perform satisfactorily prior to use and must bear

may be substituted by equivalent items.

evidence of current calibration. The equipment must

Table 2-1. Minimum Specifications of Equipment Required

Manufacturer, model, National

Minimum we

stock number, and military

Item

Common name

specifications

designation

METER CALIBRATOR

Current Range: .03 to 20.50 amperes.

John Fluke, Model 760A (TS-2734/U)

Voltage Range: 0 to 50 volts.

(6625-00-935-7002).

Accuracy: ±1.25%

METER TEST SET.

Current Range: .03 to 20.50 amperes.

TS-682/GSM-1 (6625-00-669-0747).

Voltage Range: 0 to 50 volts

Accuracy: ±1.25 %

The calibration equipment utilized in this procedure was selected from those known to be available at Department

of Defense facilities, and the listing by make of model number carries no implication of preference, recommendation, or

approval by the Department of Defense for use by other agencies. It is recognized that equivalent equipment produced

by other manufacturers may be capable of equally satisfactory performance in the procedure.

Issued with AN/GSM-256.