TB 9-5210-204-24
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Micrometer Caliper, Type I, Class 1, Style A, B, C and D, and Type I, Class 2,
Style A, B and C (GGG-C-105) and (GGG-C-105b). The manufacturer's manual and federal
specification 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.
included in this bulletin. For Type I: Caliper, micrometer, outside:
Class 1: Enameled I-beam or tubular frame:
Style A: Solid anvil
Style B: Interchangeable anvil
Style C: Tubing, ball anvil
Style D: Tubing, upright anvil
Class 2: Finished frame:
Style A: Solid anvil
Style B: Paper gage
Style C: Tubing, ball anvil
b. Time and Technique. The time required for this calibration is approximately 1
hour, using the physical technique.
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. 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.
Test instrument parameters
Performance specifications
Length measurement
Range: 0 to 36 in. or 0 to 300 mm
in 1 inch increments
Accuracy: Refer to tables 5 and 6 for tolerances
Parallelism
Range: 0 to 5 in. or 0 to 125 mm
Accuracy: Refer to table 4 for tolerances