TB 9-6625-1976-24
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 8 through 12 are not within tolerance,
perform power supply check prior to making adjustments. If adjustments are made, repeat
paragraphs 8 through 12. Do not perform power supply check if parameter is within
tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
WARNING
HIGH VOLTAGE is used or exposed during the performance of
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 from TI only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. Connect TI to 115 V ac power source.
c. Position controls as listed in (1) through (7) below:
(1) POWER switch to ON.
(2) MODE switch to STDBY.
(3) CONTROL switch to LOCAL.
(4) PHASE LOCK switch to OFF.
(5) SENSE switch to INT.
(6) VOLTAGE ERROR-% switch to OFF.
(7) VERNIER control to 0 (zero).
d. Allow 1 hour for equipment to warm-up and stabilize.
a. Performance Check
(1) Connect frequency counter to COUNTER OUTPUT (rear of TI).
(2) Set VOLTAGE RANGE switch to 10 V and VOLTAGE dials to 10.00000.
(3) Set FREQUENCY RANGE-Hz switch to 100, FREQUENCY dials to 50.00 Hz,
and MODE switch to OPER.
(4) If frequency counter does not indicate between 19.7628 and 20.2429 ms, perform
b below.
(5) Repeat technique of (2) through (4) above for each frequency listed in table 3.