TB 9-5210-218-40
TI
ANGLE
PLATE
SURFACE
PLATE
SINE PLATE
SINE PLATE
PIVOT POINT
Figure 2. Edge square equipment setup.
(2) Turn the TI on one side and clamp the TI lightly to the angle plate, then place
on the sine plate.
(3) Rotate the TI protractor inner circle until the bubble in the center of the TI
indicates a level position.
(4) Verify TI protractor indication is between 89.9 and 90.1.
(5) Turn the TI end for end and position in the same place as prior to reversal. The
same edge of the TI is in contact with the sine plate.
(6) Repeat steps 3 and 4 above.
(7) Repeat steps 3 thru 6 above for the remaining side.
b. Adjustments. No adjustments can be made.
10. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA equipment label/form in accordance with TB 750-25.