TB 9-5120-212-24
(b) Turn T-handle cw to obtain a 500 ft-lb indication on TI. Record indication of
force/torque indicator.
(c) Turn T-handle ccw to release applied torque.
(d) Press the F4 key on the force/torque indicator until the
soft keys are
displayed. Press the
soft keys as necessary to select the torque cell for the TI range
and direction being calibrated. Ensure the serial number matches the torque cell being used.
(e) Press the F4 key on the force/torque indicator until the UNIT soft key is
displayed. Press the UNIT soft key as necessary to select ftlb.
(f) Press the SIGNAL to select the GROSS mode of operation. Press the
F4 key on the force/torque indicator until the Acal soft key is displayed. Press the Acal soft
key as necessary to activate the Acal enunciator.
(g) Exercise TI and torque cell scale three times in ccw direction.
(h) Press the F4 key on the force/torque indicator until →0← soft key is
displayed. Press the →0← soft key to zero force/torque indicator.
(i) Turn T-handle ccw to obtain a 500 ft-lb indication on TI. Record indication
of force/torque indicator. If indication is not within 5 ft-lbs of indication recorded in (b)
above, perform b (1) through (3) below.
(5) Turn T-handle cw to release applied torque.
(6) Press the F4 key on the force/torque indicator until the
soft keys are
displayed. Press the
soft keys as necessary to select the torque cell for the TI range
and direction being calibrated. Ensure the serial number matches the torque cell being used.
(7) Press the F4 key on the force/torque indicator until the UNIT soft key is
displayed. Press the UNIT soft key as necessary to select ftlb.
(8) Press the SIGNAL to select the GROSS mode of operation. Press the F4
key on the force/torque indicator until the Acal soft key is displayed. Press the Acal soft
key as necessary to activate the Acal enunciator.
(9) Exercise TI and torque cell scale three times in cw direction.
(10) Press the F4 key on the force/torque indicator until →0← soft key is displayed.
Press the →0← soft key to zero force/torque indicator.
(11) Set TI for cw operation.
(12) Turn T-handle cw to obtain a 500 ft-lb indication on TI. If force/torque indicator
does not indicate between 485 and 515 ft-lbs (490 and 510 ft-lbs for Powerdyne, Model PD
1220B), perform b (4) through (10) below.
(13) Operate TI cw to obtain indications listed in table 5. If force/torque indicator
indications are not within limits specified, repeat (4) through (12) above.
Table 5. Calibration Accuracy - Powerdyne,
Models PD 1220 (and PD 1220B).
Test instrument
Torque cell indications (ft-lbs)
indications
(ft-lbs)
Min
Max
250
242.5 (225)
257.5 (275)
300
291 (275)
309 (325)
750
727 (725)
773 (775)
1000
970 (975)
1030 (1025)
1175
1139 (1150)
1210 (1200)
11