TB 9-5120-207-35
(b) Set ratchet on main drive to drive in nut-on direction (cw).
(c) Rotate TI hand crank in nut-on direction (cw) until TI indicates
approximately 300 ft-lbs. After 30 seconds, reverse small ratchet and turn multiplier drive
in opposite direction until TI indicates 0.
(d) Repeat (a) through (c) above two times.
NOTE
The calibration points must be approached in the direction of
and approach calibration point again.
(2) Rotate TI hand crank in nut-on (cw) direction to obtain indications listed in table
3. Record load cell indicator indications.
NOTE
Whenever direction of torque is changed (cw or ccw), TI must
be exercised three times.
(3) Repeat (1) and (2) above in nut-off (ccw) direction.
(4) If indications are not within the limits specified and indication errors are same
in both cw and ccw directions, perform b(1) through (3) below.
(5) If indications are not within the limits specified and indication errors are not the
same in both cw and ccw directions, perform b(4) below.
b. Adjustments
NOTE
Whenever direction of torque is changed (cw or ccw), TI must
be exercised three times.
Table 3. Calibration
Test instrument
Load cell indicator indication
indications (ft-lb)
Min
Max
50
49
51
100
98
102
150
147
153
200
196
204
250
245
255
300
294
306
(1) Remove lens retaining ring and lens from TI indicator (tape may aid in
removing lens).
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