TB 9-6625-2357-50
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 with
TRANSDUCER
Accuracy: 0.000025 in.
ND281B Display Unit
6. Preliminary
Instructions
a. The
instructions outlined in
paragraphs 6 and
7 are preparatory to the
calibration
process. Personnel should become familiar with the entire bulletin before beginning the
b. Items of equipment used in this procedure are referenced within the text by common
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
d. Unless otherwise specified, all controls and control settings refer to the TI.
e. Carefully inspect TI anvil for burrs, protrusions, and other defects. If necessary
a. Clean TI anvil and electronic linear transducer probe tip with alcohol.
b. Mount electronic linear transducer in TI dial indicator mount using shaft diameter adapter.
c. Connect the electronic linear transducer to the ND281B display unit and connect
display unit to 110 V ac.
d. Set electronic linear transducer display unit for a 0.000001 resolution.
Note:
Zero electronic linear transducer display unit. Ensure the
electronic linear transducer and TI has full 1 in. travel.
e. Allow 1 hour equipment stabilization time.
8. Dial Indicator Calibrator (DIC) Linearity Accuracy
a. Performance Check
(1) Set TI to zero position (fully down).
(2) Zero electronic linear transducer display unit.
(3) Adjust TI clockwise (CW) to first TI setting in table 3.
(4) Verify that the electronic linear transducer display unit displays within limits in
(5) Repeat technique of (3) and (4) for all TI settings listed in table 3.