SECTION II EQUIPMENT REQUIREMENTS

TB 9-1430-201-50

Table 1. Calibration Description - Continued

Test instrument

Model

Parameters

Performance specifications

DV311

Input resistance

10 and 100 kΩ ±0.05%

Ratio linearity

±0.005%

DV411

Input resistance

10 and 100 kΩ ±0.05%

Ratio linearity

±0.005%

DV412

Input resistance

10 and 100 kΩ ±0.05%

Ratio linearity

±0.005%

1454A

Voltage ratio

0.0001 to 1.0000 ±0.04% of indicated ratio for

input below 120 V

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 calibration

standards set 4931-621-7877 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 accuracy 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 listeds in table 3 are issued with secondary

transfer calibration standards set 4931-621-7877 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

Minimum use

Manufacturer, model

Item

Common name

specifications

and part number

NULL DETECTOR

ESI, Model 801 MOD (7912151-2)

Sensitivity: 0.2 µV/div

RESISTANCE BRIDGE

ESI, Model 230B (7912150-2)

Range: 99Ω to 101 kΩ

and ESI, Model 801 MOD

Accuracy: 0.0125%

(7912151-2)

VOLTAGE DIVIDER

Models T-10-A Series and TA-1001:

General Resistance, Model

Range: 0.099 to 0.991

DV4107C (MIS-10274)

Accuracy: ±0.025%

Model DP211:

Range: 0.1110899 to 0.99991

Accuracy: ±0.0025%

Model DP311:

Range: 0.1111045 to 0.9999950

Accuracy: ±0.00125%

Models DV411 and DV412

Range: 0.00105 to 0.90005

Accuracy: ±-0.00125%

Model 1454A

Range: 0.1111 to 0.900

Accuracy: ±0.01%