TB 9-6625-102-24
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 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 checks where applicable.
NOTE
Meter accuracy will stay within specification only if the
adjustment procedure is performed. First, the TI should be
tested entirely to determine the AS FOUND condition noting
any out of tolerance condition. Next, the TI should be adjusted
to guarantee specification, and reporting the adjustment in
accordance with paragraph 2 b above that were made as a
result of any failures previously recorded. Finally, the TI
should be retested to ensure the AS LEFT condition meets all
specifications.
a. Set TI POWER on and allow at least 5 minutes with a short connected to the V and
COM input terminals for TI to stabilize.
b. Use high quality, low thermal leads throughout entire calibration process.
c. Using the table 2 multimeter, measure and record the 3, 5, 50 and 500 MΩ
(Resistance Standard No. 2) resistance standard values for use in paragraph 13.
8. DC Voltage and Linearity Accuracy
a. Performance Check
ΩTEMPVmV and COM
(1) Connect calibrator OUTPUT HI and LO to TI
inputs.
(2) Set the TI as listed in (a) through (c) below:
(a) Set rotary switch to
mV.
(b) Press SHIFT key for a
DC indication.
(c)
Press the RANGE key for a 50 mV range.
(3) Set the calibrator output voltage to the first value in table 3.
