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
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.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA Label/Form in accordance with TB 750-25.