TB 9-4920-364-24
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 and TM 55-4920-244-14
for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
NOTE
If TI requires adjustment, remove deck assembly from
protective case and place right side up on an insulated bench.
It will be necessary to remove TEMP. REGULATOR knob
and power supply BH1766 board.
a. Level and support TI deck assembly, using level.
b. Position controls as listed in (1) through (4) below:
(1) TEMP. REGULATOR control fully ccw.
(2) SELECTOR SWITCH SW-1 to OFF.
(3) SW-7 switch to OFF.
(4) SW-6 switch to MECH. ZERO.
c. Connect TI power line connector P1 to autotransformer using cable (BH499, p/o TI).
Connect autotransformer to a 115 V ac source and adjust for 110 V output. Allow 1 hour for
TI to warm-up.
8. Potentiometer Accuracy
a. Performance Check
(1) Connect equipment as shown in figure 1.