TB 9-5120-212-35
a. Performance Check
NOTE
To prevent overshoot of desired torque, stop applying pressure
approximately 30 ft-lbs before desired torque. Release crank
momentarily and allow display to catch up. Continue cranking
at slower speed and shorter increments.
NOTE
To reverse ratchet mechanism, crank handle from load (if any)
to no load. Continue cranking while rotating the reversing ring
until the ring freely snaps into proper position.
(1) Exercise TI as follows:
(a) Turn crank handle cw to obtain an approximate full-scale indication on TI
indicator. The force/torque indicator will indicate ccw reaction torque.
(b) After 30 seconds, turn crank handle ccw to obtain a 0 (000 for DPT series)
indication on TI indicator.
(c) Repeat (a) and (b) above two times.
(d) Check TI for a 0 (000 for DPT series) indication on TI indicator. Reset if
necessary.
(2) Press the F4 key on the force/torque indicator until you see →0← as soft key.
Press the →0← soft key to zero force/torque indicator.
(3) Operate TI cw to obtain indications listed in table 4. If force/torque indicator
indications are not within limits specified, perform b(1)-(10) below (b(11)-(13) for DPT
series) (for PD 12003 see note below). Turn TI crank handle ccw to remove torque.
NOTE
For PD 12003, if indications are not in tolerance, prepare a test
report (correction chart) showing actual values for nominal TI
indications of 5500 and 6000 ft-lbs.
NOTE
The calibration points must be approached in the direction of
increasing torque. If calibration point is passed, reduce torque
and approach calibration point again.