SECTION II EQUIPMENT REQUIREMENTS - TB-9-4931-383-500005

SECTION I IDENTIFICATION AND DESCRIPTION - TB-9-4931-383-500004

SECTION III CALIBRATION PROCESS FOR MODEL 332A

TB-9-4931-383-50 Calibration Procedure for Voltage Standard John Fluke Models 332A 332B and 332B/AF Manual
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TB 9-4931-383-50

Table 1. Calibration Description

Test Instrument Parameters

Performance Specifications1

Voltage range

10-v range; 0 to 11.111110 v (1-v steps)

100-v range; 0 to 111.11110 v (10-v steps)

1000-v range; 0 to 1111.1110 v (100-v steps)

Resolution Accuracy

0.1 ppm of range (1 v max)

10-v range; (0.003% of setting +10 v)

100-v range; (0.003% of setting +20 v)

1000-v range; (0.003% of setting +40 v)

Over-voltage protection

Automatically disables output voltage if level

exceeds selected value (10 to 110% of selected

range).

Output current

0 to 50 ma (any voltage setting)

Over-current protection

Automatically limits output current to present

level; between 1 and 60 ma.

Line and load regulation

0.0005% of setting or 25 v for 10% change in

line voltage from nominal.

1The

specifications for models 332B and 332B/AF have been derated to the same as model 332A

which are, reflected in this calibration description.

SECTION II

EQUIPMENT REQUIREMENTS

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

calibration procedure. This equipment is issued with secondary reference standards

calibration set NSN 4931-00-621-7878, 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. When accuracies listed in table 2 provide a

four-to-one accuracy ratio between the standard and TI. Where the four-to-one ratio cannot

be met, the accuracy of the equipment selected is shown in parenthesis.

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

Manufacturer, Model, and

Item

Common Name

Minimum Use Specifications

Part Number

AUTOTRANSFORMER

Range: 105 to 125 vac

General Radio, Model

Accuracy: 1%

WI0MT3AS3 (7910809)

DC TRANSFER

Range: 1 and 10 vdc

John Fluke, Model 730A/AB (MIS-

STANDARD

10358, type 2)

Accuracy: 0.0005% when

transferred from saturated

cells

DECADE RESISTOR

Range: 20 to 200 ohms

Biddle-Gray, Model 601147-1

Accuracy: l

(7910328)

NULL DETECTOR

Range: 0 to 1000 vdc

John Fluke, Model 845AB

Accuracy: N/A

(8205517)

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