TB 9-5210-220-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Caliper, Micrometer, Bench, Starrett Model 777XFLZ. The manufacturer's
manual and federal specifications 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 is approximately 1
hour, 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 table 1.
Test instrument parameters
Performance specifications
Length measurement
Range: 0 to 1 in. or 0 to 25 mm
Accuracy: 0.0001 in. or 0.003 mm
Parallelism
Range: 0 to 1 in. or 0 to 25 mm
Accuracy: Less than 0.0001 in. or less than 0.003 mm
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; or AN/GSM-440. Alternate items may be used
by the calibrating activity when the equipment listed in table 2 is not available. 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 parentheses.
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in 4 above, and are not listed in this calibration
procedure. The following peculiar accessory is also required for this calibration: Ball
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
GAGE BLOCK SET
Range: 0.100 in to 1 in.
Starrett Model SC37.AAX (13534019)
(37 PIECE SET)
Accuracy: AS-1
RSS method used for multiple gage blocks.
Uncertainty shall not exceed 25 inches