TB 9-6625-2107-24
c. Unless otherwise specified, verify the results of each test and, whenever the test
requirement is not met take corrective action before continuing with the calibration.
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.
12. 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 only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. Adjust front panel mechanical zero adjustment (model 400F only) for a 0 indication.
c. Assure 115/230 slide switch (rear panel) is set for 115 V ac.
d. Set 100 kHz L. P. FILTER to OUT.
e. Set RANGE switch to 300 VOLTS and power switch to ON and allow at least 30
minutes for warm-up and stabilization.
13. Range Accuracy and Stability
a. Performance Check
(1) Connect calibrator OUTPUT to TI INPUT terminal.
(2) Set RANGE switch to 30 MV.
(3) Set calibrator FREQUENCY for 400 Hz and output AMPLITUDE for
indication of 3 on TI 0 to 3 scale. If calibrator does not indicate 30 mV 1 percent, set
calibrator output AMPLITUDE to 30 MV and adjust A2R62 (400 HZ 30MV CAL) (fig. 2)
for TI indication of 3 (R).
(4) Repeat technique of (1) through (3) above for remaining calibrator frequencies
listed in table 5. Calibrator Error display will be within specified limits; if not, perform
indicated adjustments.
NOTE
In table 5 below where `- - -' appears in "Meter indication"
column and 'N/A' appears in "Error display" column, a
reference point is being established on the TI to be used in
paragraph 14 below. TI accuracy is not being verified at these
points.
