TB 9-6625-1976-24
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 results 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 16 and 18 are not within tolerance,
perform the power supply check in paragraph 19 prior to making adjustments. After
adjustments are made, repeat paragraphs 16 (or 17) and 18. 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.
15. 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.
a. Remove protective cover on TI, as required, for making adjustments.
b. Connect TI to ac calibrator, model 5200A. The calibrator should be the one normally
used with the TI and should have been recently calibrated.
c. Connect TI and ac calibrator to a 115 V ac source.
16. High Voltage Accuracy (Reference Level)
a. Performance Check
(1) Connect TI output connector to the ac measurement standard INPUT 2 HI and
INPUT 2 LO terminals. Press ac measurement standard INPUT 2 pushbutton.
NOTE
Ensure that OUTPUT LOW and GUARD terminal connecting
strap is securely in place on TI.
(2) Set both TI and ac calibrator POWER switches to ON. Allow at least 1 hour for
equipment to warm-up and stabilize.
NOTE
The operation of the TI is controlled by the ac calibrator. The
TI controls referred to in the remainder of the check are located
on the ac calibrator.