SECTION II EQUIPMENT REQUIREMENTS - TB-9-4931-393-350005

SECTION I IDENTIFICATION AND DESCRIPTION - TB-9-4931-393-350004

SECTION III CALIBRATION PROCESS - TB-9-4931-393-350006

TB-9-4931-393-35 Calibrator AN/USM-317 (SG-836/USM-317) (Hewlett-Packard Model 8402B) Manual
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TB 9-4931-393-35

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 2 identifies the specific equipment used in this

calibration procedure. This equipment is issued with Secondary Transfer Standards

Calibration Sets NSN 6695-00-621-7877, NSN 6695-00-525-8175 (AN/GSM-256), NSN

493101-019-1829 (AN/GSM-259), and Transportable Maintenance Calibration Facility

AN/TSM-55( ), and is to be used in performing this procedure. Alternate items may be

used by the calibrating activity when the equipment listed in table 2 is not available.

The items selected must be verified to perform satisfactorily prior to use and must bear

evidence of current calibration. The equipment must meet or exceed the minimum use

specifications listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio

between the standard and TI.

5. Accessories Required. The accessories listed in table 3 are issued as indicated in

paragraph 4 above and are to be used in this calibration procedure. When necessary,

these items may be substituted by equivalent items unless specifically prohibited.

Table 2. Minimum Specifications of Equipment Required

Common name

and/or

Minimum use

AN/GSM

AN/GSM-

Item

official nomenclature

specifications

Level A

-256

259

AN/TSM-55

AUTOTRANSFORMER

Range: 105 to

General Radio,

Same as

TF-510/U General

(VARIABLE

125 V ac

Model

Level A

Radio, Model

POWER

Accuracy: 1%

W10MT3AS3

W10MT3A (6120-

TRANSFORMER)

(7910809)

054-7794)

DC VOLTMETER

Range: 0.44699 to

John Fluke,

Same as

TS-2843 /U

(DIFFERENTIAL

30.05 V dc

Model

Level A

John Fluke,

VOLTMETER)

Accuracy:

887ABAN

Model 883AB

0.0125%

(887ABAN)

(6625-054-

6496)

RESISTANCE BRIDGE

Range: 99.44 to

ESI, Model

ESI,

Same as

AN/USM-263

200.12 Ω

230B

Model

AN/GSM-

(6625-927-

Accuracy: 0.015%

(7912150-2)

250DER

256

4451)

ESI, Model

(250DER)

801 MOD

(7912151-2)

Table 3. Accessories Required

Common name

and/or

Item

(official nomenclature)

Description and part number

CABLE ASSEMBLY

30-in., RF with double banana plug terminations

(Red) (7907470)

LEAD

4-in., No. 18 AWG banana plug terminations (Black)

(7907492)

TEST HOOK PROBE 1

Banana plug to mini-hook (SKC4850-14)

1Two

required.

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