TB 9-6625-2208-24
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 the manufacturers' manuals and/or technical
manuals for the 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 protective cover from TI only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. Connect TI V-
input to calibrator OUTPUT HI and TI COM input to calibrator
OUTPUT LO.
8. Dc Voltage
a. Performance Check
(1) Set the function/range switch to DCV 200 m position.
(2) Set calibrator for an output amplitude of 190 mV dc. If TI does not indicate
within limits specified in first row of table 3, perform b below.
(3) Repeat technique of (1) and (2) above using outputs and settings listed in table 3.
TI will indicate within limits specified in table 3.
Table 3. Dc Voltage Accuracy
Test instrument
Calibrator
Range
Indication limits
output
setting (DCV)
Min
Max
190 mV
200 m
189.4
190.6
1.9 V
2
1.894
1.906
19 V
20
18.94
19.06
190 V
200
189.4
190.6
1000 V
1500
997
1003
(4) Reduce all outputs to minimum.
b. Adjustments
(1) Set calibrator for an output amplitude of 190.00 mV.
(2) Adjust potentiometer DC VOLT ADJ R5 range, (fig. 1) until TI indicates
190.0 mV (R).