Equipment Setup

TB 9-4920-364-35

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

WARNING

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.