TB 9-5120-212-24
CALIBRATION PROCESS FOR
POWERDYNE, MODELS PD 1220 AND PD 1220B
10. Preliminary Instructions
a. The instructions outlined in paragraphs 10 and 11 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
11. Equipment Setup
a. Verify that TI is clean and free from defects that would impair its operation.
b. Ensure that equipment has been allowed to stabilize at the ambient temperature.
c. Position torque fixture on a stable and rigid work surface and secure with bolts
or clamps.
d. Place torque cell no. 1 inside fixture with dowel pins engaging holes in bottom of fixture.
e. Place plate (furnished with torque fixture) on top of torque cell.
f. Insert drive bar into square opening in plate.
g. Place TI on fixture, engaging drive bar and dowel pins.
h. Connect torque cell to force/torque indicator using cable supplied with force/torque
indicator. Connect force/torque indicator to appropriate power source. Turn power switch
to ON and allow the units to warm-up for 30 minutes. Select channel 3 using the
CHANNEL + and keys.
i. 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.
j. 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.
k. 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.
