TB 9-6625-2020-24
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. 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. Remove TI protective cover as required.
b. Connect TI to power module using extender.
c. Connect power module to 115 V ac power source.
d. Release TI dB/OUT: NORM pushbutton to OUT: NORM and INPUT INT/OUT:
EXT pushbutton to OUT: EXT.
e. Pull power module PWR switch to on and allow at least 30 minutes for warm-up.
8. Dc Volts
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI INPUT HI and LO.
(2) Set TI range/function switch and calibrator output for settings listed in table 3.
If TI indications are not within limits specified, perform b below.
Table 3. Dc Volts
Test instrument
range/function
Test instrument indications
output settings
switch settings
(DC VOLTS)
Min
Max
200
mV
180
mV
179.7
mV
180.3
mV
2
1.8
V
1.797 V
1.803 V
20
18
V
17.97 V
18.03 V
200
180
V
179.7
V
180.3
V
1
k
1000
V
998
V
1002
V
b. Adjustments
(1) Set calibrator to STANDBY and disconnect from TI.
(2) Set TI range/function switch to 2 DC VOLTS.