TB 9-6625-2020-35
14. Preliminary Instructions
a. The
instructions outlined in
paragraphs 14 and
15 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
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 16 through
20 are not within
tolerance,
perform the power supply check prior to making adjustments. After adjustments are
made, repeat paragraphs 16 through 20. Do not perform power supply check if all other
parameters are within tolerance.
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 TI protective cover as required.
b. Connect TI to power module using extender.
c. Connect power module to a 115 V ac source.
d. Release TI INPUT INT/EXT pushbutton to EXT.
e. Pull power module PWR switch to on and allow at least 30 minutes for warmup.
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI VOLTS/Ω and LOW.
(2) Press TI VOLTS DC pushbutton.
(3) Press TI range pushbuttons and set calibrator output to settings listed in
table 8. If TI
does not
indicate within limits
specified, perform b below.