SECTION 1 IDENTIFICATION AND DESCRIPTION

TB 9-4220-215-35

SECTION 1

IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification.

This bulletin provides instructions for the

calibration of Depth Gages (General). Calibration and Repair Requirements Worksheets,

DA Form 3758, and the manufacturers' manuals were used as the prime data sources in

compiling these instructions. The equipment being calibrated will be referred to as the TI

(test instrument) throughout this bulletin.

a. Model Variations. Model variations are described in appendix.

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

hours, using the physical technique.

2. Forms, Records, and Reports. Forms, records, and reports required for calibration

personnel at all levels are prescribed by TB 750-25.

3. Calibration Description. TI parameters and performance specifications which

pertain to this calibration are listed in appendix.

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 1 identifies the specific equipment to be used in this

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Set AN/USM-286. 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 1. The accuracies listed in table 1 provide a four-to-one ratio between the

standard and the 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 1. Minimum Specifications of Equipment Required

Manufacturer and model

Common name

Minimum use specifications

(part number)

PNEUMATIC PRESSURE

Range: 0 to 210 psi

(MIS-30859)

STANDARD

Accuracy: ±0.06 psi