TB 9-4931-428-40
Example:
Initial Calibration
Indication
Correction
( F)
( F)
-20
+0.6
32
+0.4
80
+0.2
100
0.0
At the end of calibration interval, TI is checked at ZERO point with the following result: New
correction = +0.3. The change in ZERO point is -0.1. This decrease is applied to correction chart from
initial calibration to produce the following:
New correction chart based on zero point
Indication
Correction
( F)
( F)
-20
+0.5
32
+0.3
80
+0.1
100
-0.1
b. Adjustments
(1) If TI indication exceeds scale correction tolerance listed in table 5, but does not
exceed rejection tolerance, prepare a correction chart, specifying scale correction.
(2) If TI is out-of-tolerance according to both average allowable deviation and
rejection tolerance columns of table 5, TI must be rejected.
10. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA Label/Form in accordance with TB 750-25.