TB 9-4931-541-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Dial Indicator Calibrator, ITALL Model 700. The manufacturer's manual was
used as the prime data source 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 that
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Range
0.0 to 1.0 in.
Accuracy
0.0001 in. over entire range
Resolution
0.000001 in.
EQUIPMENT REQUIREMENT
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standard 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
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 the calibration are common usage
accessories, issued as indicated in paragraph 4 above, and are not listed in this calibration
procedure. The following peculiar accessories are also required for this calibration:
ND281B Display Unit and Shaft diameter adaptor; Split Bushing, Starrett (EDP56007).
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
ELECTRONIC LINEAR
Range: 0.0 to 1.0 in.
Heidenhain, Model MT2501
TRANSDUCER
Accuracy: 0.000025 in.
