TB 9-5120-212-24
NOTE
Turning the TI crank cw will cause ccw torque on the torque cell.
g. 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.
h. 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.
i. Set TI to 0 with no torque applied.
NOTE
For DPT series set TI ON/OFF power switch to ON. If digital
display does not indicate 000, adjust ZERO ADJUST knob for
an indication of 000. Set ratchet for cw torque (Models DPT-
1200R or DPT-2500R). Ensure that ratchet reversing ring is
turned in the proper direction for cw torque.
8. Torque
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.
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 force/torque indicator.
(c) Repeat (a) and (b) above two times.
(d) Check TI for a 0 (000 for DPT series) indication on TI. Reset if necessary.
(2) 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.
(3) Operate TI cw to obtain indications listed in table 4. If force/torque indicator
indications are not within limits specified, perform b (1) through (10) below (b (11) through
(13) for DPT series) (for PD 12003 see note below). Turn TI crank handle ccw to remove torque.