TB 9-6625-340-35
SECTION III
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 and item identification number as listed in tables 2 and 3. For the identification of
equipment referenced by item numbers prefixed with A, see table 2, and for prefix B, see
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 11-6625-498-45 for this TI.
d. When indications specified in
paragraphs 8 and
9 are not within
tolerance, perform
the power supply check prior to making adjustments. After adjustments are made, repeat
paragraphs 8 and
9. 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
WARNING
HIGH VOLTAGE is used or exposed during the performance of
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
a. Remove TI protective cover.
b. Connect bolometer mount (supplied with TI) to input cable.
c. Center TI NULL INDICATOR meter by adjusting mechanical centering screw.
e. Connect autotransformer to a
115-V ac
source and
adjust for a
115-V ac
output.
f. Set LINE ON switch to ON (up) and allow 15 minutes for warm-up.
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