SECTION II. EQUIPMENT REQUIREMENTS

SECTION I. IDENTIFICATION AND DESCRIPTION

Equipment Setup

Calibration Procedure For Pitot And Static Testers Model 1811 Series Page Navigation
2

TB 9-4920-457-24

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. Where the four-to-one ratio

cannot be met, the actual accuracy of the equipment selected is shown in parentheses.

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

DHI, Model

STANDARD

RPM4-ADA160KA/A160KA

Airspeed

Range: 17.5 to 550 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.

CHANGE 2

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