Figure 4. Inside micrometer, tubular, fixed head.

Calibration Procedure For Micrometers, Inside Page Navigation
3

TB 9-5210-207-24

2. Forms, Records, and Reports

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

prescribed by TB 750-25.

b. Adjustments to be reported 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 applications which pertain

to this calibration are listed in table 1.

Table 1. Calibration Description

Test instrument parameters

Performance specifications

1/ to 42 in.

Length (English)

Range: 1 2

0.001 in. (without vernier scale)

Accuracy:

0.0001 in. (with vernier scale)

Length (Metric)

Range: 25 to 800 mm

0.01 mm

Accuracy:

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 AN/GSM-286, AN/GSM-287, AN/GSM-705 and Secondary Reference

Calibration Standards Set NSN 4931-00-621-7878. 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 2. The accuracies listed in table 2 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 parenthesis.

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.