SECTION III CALIBRATION PROCESS

TB 9-4920-359-35

SECTION III

CALIBRATION PROCESS

6. Preliminary Instructions

a. The instructions outlined in paragraphs 6 and 7 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.

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.

a. Set all TI switches to down or OFF position.

b. Adjust all meters for mechanical zero or lowest pointer reading.

c. Connect equipment as shown in figure 1.

GEN-T1, T2, and T3 circuit breakers to out position.

d. Pull 400

e. Set GEN/PMG VOLTS switch to T1.

f. Set power amplifier OUTPUT VOLTAGE RANGE switch to 200 V and adjust

POWER AMPLIFIER GAIN control fully ccw.

NOTE

Input voltage source (calibrator) for the power amplifier must

be set to 1 Vrms as shown in green area of Regulation Range

Meter of power amplifier plug-in module. Calibrator EX SENS

must always be activated for input into power amplifier. Input

frequency can be adjusted as required for desired power

amplifier frequency output.