TB 9-6625-2190-35
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 11-6625-3199-14 for this TI.
d. Unless otherwise specified, all control and control settings refer to the TI.
7. Equipment Setup
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 protective cover from TI as necessary to gain access to adjustments.
b. For some checks throughout this procedure, it may be necessary to manually set TI
range by pressing RANGE pushbutton.
8. Dc Voltage
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI VΩ and COM.
(2) Set function switch to dc mV.
(3) Set TI and calibrator for settings listed in table 3. If TI does not indicate within
limits specified, perform b below.
Table 3. Dc Voltage
Test instrument
Test instrument indications
range settings
Calibrator settings
Min
Max
300
mV
300 mV
299.6
300.4
3
V1
3
V
2.996
3.004
30
V
30
V
29.96
30.04
300
V
300
V
299.6
300.4
1000
V
1000
V
998
1002
3
V
1000
V
.990
1.010
2
1Set function switch to dc V.
2Connect
high voltage probe (80K-6) (supplied with TI) between TI VΩ and COM and
calibrator OUTPUT HI and LO. If high voltage probe is not supplied with TI, disregard this step.
b. Adjustments
(1) Set function switch to dc V.
(2) Set calibrator for a 3 V dc output.
(3) Press RANGE pushbutton for 3 V range.
(4) Adjust R19 (fig. 1) until TI indicates 3.000 V dc (R).
