SECTION II EQUIPMENT REQUIREMENTS - TB-9-4920-457-350003

SECTION I IDENTIFICATION AND DESCRIPTION - TB-9-4920-457-350002

Equipment Setup - TB-9-4920-457-350004

TB-9-4920-457-35 Pitot and Static Testers Barfield Model 1811 Series Manual
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TB 9-4920-457-35

Table 2. Calibration Description

Test instrument parameters

Performance specifications

Altitude

Refer to table 1 for range and table 4 for accuracy

Vertical speed (rate of climb)

Refer to table 1 for range and table 5 for accuracy

Airspeed

Refer to table 1 for range and table 6 for accuracy

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 3 identifies the specific equipment to be used in this

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Sets AN/GSM-286, AN/GSM-287, 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 3. The accuracies listed in table 3

provide a four-to-one ratio between the standard and TI.

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.

Table 3. Minimum Specifications of Equipment Required

Manufacturer and model

Common name

Minimum use specifications

(part number)

PNEUMATIC PRESSURE

Druck, Model DPI 145/R (MIS-

STANDARD

45842)

Airspeed

Range: 17.5 to 655 knots

Accuracy: 0.19% of reading

Altitude

Range: 0 to 55,640 ft

Accuracy: 0.21% of reading

Rate of climb

Range: 400 to 5500 ft/minute

Accuracy: 1.75% reading

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 3.

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