TB 9-4931-501-24
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 procedure before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name and item identification number 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. When indications specified in paragraphs 8 through 20 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 20. Do not perform power supply check if all other
parameters are within tolerance.
e. 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. Refer to figure 1 for location of TI circuit boards.
b. Remove top and bottom protective covers from TI. Insure that line selector block
(fig. 2) for 120 V ac operation is installed.
c. Connect TI to autotransformer.
d. Connect autotransformer to 115 V ac source and adjust output to 115 V ac.
e. Install vertical amplifier into TI left compartment and time base into right compartment.
f. Position TI controls as listed in (1) through (5) below:
(1) INTENSITY control ccw (off).
(2) FOCUS control to midrange.
