*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
meet or exceed the minimum use specifications listed in
specific equipment used in this calibration procedure.
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
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
1
Manufacturer, model, National
Minimum we
stock number, and military
Item
Common name
specifications
designation
2
A1
METER CALIBRATOR
Current Range: .03 to 20.50 amperes.
John Fluke, Model 760A (TS-2734/U)
Voltage Range: 0 to 50 volts.
Accuracy: 1.25%
A2
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 %
1
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.
2
Issued with AN/GSM-256.
2
