TB 9-4931-217-40
CALIBRATION PROCESS FOR AC GENERATOR DETECTOR, MODEL 860A
11. Preliminary Instructions
a. The instructions outlined in paragraphs 11 and 12 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.
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.
NOTE
Do not remove TI protective cover except when necessary for
access to internal test points or adjustments.
Reinstall
protective cover immediately after completion of performance
check or adjustment.
NOTE
Unless otherwise specified, all controls and control settings
refer to the TI.
12. Equipment Setup
CAUTION
Disconnect TI from ac power source when removing or
reinstating TI protective cover.
a. Rotate GEN VOLTAGE control fully ccw (counterclockwise) to OFF.
b. Connect autotransformer to a 115 V ac (volt alternating current) source and adjust
controls for a 115 V ac output.
c. Connect TI to autotransformer and turn GEN VOLTAGE control cw (clockwise) out
of OFF position. Allow at least 15 minutes for equipment to warm-up and stabilize.
13. Generator Frequency and Detector Selectivity
a. Performance Check
(1) Rotate GEN VOLTAGE control fully ccw to OFF.