TB 9-6625-2071-24
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 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 TM 11-6625-2941-14&P and the manufacturers'
manuals 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. Connect TI to autotransformer.
b. Connect autotransformer to a 115 V ac power source and adjust output to 115 V.
c. Set power switch to ON and allow at least 1 hour for warm-up. If TI has been
disconnected from line power for more than 24 hours, allow at least 24 hours for warm-up
before beginning calibration.
d. Position controls as listed in (1) through (12) below:
(1) FUNCTION switch to FREQ A.
(2) FREQ RESOLUTION, N switch to 1Hz, 106.
(3) SAMPLE RATE control fully ccw.
(4) LEVEL A and LEVEL B controls to PRESET.
(5) CHANNEL A and B DC/AC switches to DC.
(6) CHANNEL A and B ATTEN switches to X1.
(7) CHANNEL A and B SLOPE switches to +.
(8) COM A/SEP switch to SEP.
(9) 1M/50Ω switch to 1M (option 041).
(10) ARM switch (rear panel) to OFF.