TB 9-6625-2315-24
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
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.
SECTION IV contains the adjustments required to calibrate the TI.
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. Connect TI to a 115 V ac power source.
b. Press and hold down Shift key for more than 5 seconds after pressing POWER
ON/OFF pushbutton to ON then release Shift key to start self-test. Self-test will complete
in approximately 20 seconds. If self-test is successful, TI will briefly display PASS then go
into dc voltage measurement mode.
c. Release Terminals Front/Rear pushbutton to Front and allow 1 hour for warm-up.
8. Dc Voltage
a. Performance Check
(1) Press FUNCTION DC V key.
(2) Press Shift key then RANGE/DIGITS Auto/Man key to select 6 digits resolution.
(3) Short TI front and rear input terminals as shown in figure 1 using copper wire
and allow 5 minutes for thermal offset voltage settling after handling input connections.
