SECTION II EQUIPMENT REQUIREMENTS

TB 9-4920-364-35

SECTION II

EQUIPMENT REQUIREMENTS

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

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Set AN/GSM-286 or AN/GSM-705.

Alternate items may be used by the

calibrating activity. 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. Where the four-to-one ratio cannot be met, the

actual accuracy of the equipment selected is shown in parenthesis.

5. Accessories Required. The accessories required for this calibration are common

usage accessories, issued as indicated in paragraph 4 above, and are not listed in this

calibration procedure. The following peculiar accessories are also required for this

calibration: Level, Bench type (7902565); Pin, 1 in., number 14 or 16 gauge wire (two

required, fabricate locally).

Table 2. Minimum Specifications of Equipment Required

Minimum use

Manufacturer and model

Common name

specifications

(part number)

AUDIO ANALYZER

Range: 60 to 75 Hz

Boonton, Model 1121 (1121)

Frequency response: ±0.25%

AUTOTRANSFORMER

Range: 105 to 125 V ac

General Radio, Model

±1%

W10MT3AS3 (7910809)

Accuracy:

CALIBRATOR

Range: 0.84 to 48.0 mV dc

John

Fluke,

Model

5720A

(5700A/EP) (p/o MIS-35947)

±0.33%

Accuracy:

FREQUENCY COUNTER

Range: 14.20 to 14.30 ms

Fluke, Model PM6681/656

±0.025%

(PM6681/656)

Accuracy:

MULTIMETER

Range: 125 to 135 V ac;

Hewlett-Packard,

Model

3458A

29 mV dc

(3458A)

±1%

Accuracy:

RESISTANCE STANDARD

Biddle-Gray, Model 71-631

Range: 0 to 110,000 Ω

(7910328)

±0.03%

Accuracy:

THERMOMETER

Range: 70 to 85°F

Azonix, Model A1012 (MIS38958)

±1%

Accuracy:

SECTION III

CALIBRATION PROCESS

6. Preliminary Instructions

a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration

process. Personnel should become familiar with the entire bulletin before beginning the

calibration.

b. Items of equipment used in this procedure are referenced within the text by common

name as listed in table 2.