TB 9-5220-212-40
(22) Compare midpoints of centerlines and diagonal lines. Midpoints will not be off 0
by more than 20 percent of the difference between highest and lowest points on plate or
0.000030 inch, whichever is greater.
(23) An estimate of uncertainty in the calibration is 3.0 micro-inches/inch X length of
carriage used plus 1/2 the absolute sum (added without regard to sign) of the midpoints of
the 2 centerlines.
b. Adjustments. No adjustments can be made.
13. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.