SECTION I IDENTIFICATION AND DESCRIPTION

TB 9-4920-362-35

SECTION I

IDENTIFICATION AND DESCRIPTION

This bulletin provides instructions for

the

1. Test Instrument Identification.

calibration of Test Box Assy Pilot Assist/Nulling, Sirkorsky, Model 70700-20678-041.

55-4920-414-13&P was used as the prime data source in compiling these instructions.

The

equipment being calibrated will be referred to as the TI (test instrument) throughout

this

bulletin.

a. Model Variations. None.

b. Time and Technique. The time required for this calibration is approximately 2

hours, using the dc and low frequency technique.

2. DA Form 2416 (Calibration Data Card)

a. Forms, records, and reports required for calibration personnel at all levels are

prescribed by TB 750-25-1. DA Form 2416 must be annotated in accordance with TB 750-

25-1 for each calibration performed.

b. Adjustments to be reported on DA Form 2416 are designated (R) at the end of the

sentence in which they appear. When adjustments are in tables, the (R) follows the

designated adjustment. Report only those adjustments made and designated with (R).

3. Calibration Description. TI parameters and performance specifications which

pertain to this calibration are listed in table 1.

Table 1. Calibration Description

Test instrument parameters

Performance specifications

Power requirements

115 V ac, 60 Hz ±10%;

28 V dc ±1%

Dc volts

Range: -15.5 To +28.5 V

Accuracy: ±1.8%

Dc current

Range: -10.5 To +10.5 mA

Accuracy: ±5%

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. 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.