TB 9-5220-213-24
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of M2 Headspace and Timing Gage Set, Model 5351217. Drawings 5351217,
5351214, 5351213, 5351211, all dated 2008-10-08, and TB 750-25 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. None
b. Time and Technique. The time required for this calibration and completing of the
DA form 3023 card is approximately 45 minutes, using the physical technique and
instructions in Appendix.
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 in table 1.
Test instrument parameters
Performance specifications in inches
Thickness
Headspace GO (5351211)
0.2020 ( 0.0005)
Headspace NO GO (5351211)
0.2065 ( 0.0005)
Timing Gage NO FIRE (5351213)
0.1160 ( 0.0020)
Timing Gage FIRE (5351214)
0.0220 ( 0.0020)
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; AN/GSM-287; AN/GSM-421; 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 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. The following accessory is required: Gage block from test reported
Gage Block set in the approximate size range of TI.