TB 9-6625-011-24
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; then repeat the check.
b. Mechanically zero meter using front panel adjustment and set RANGE switch to
300 VOLTS.
c Connect to an appropriate ac voltage source and press LINE switch to ON. Allow at
least 30 minutes for warm-up.
8. Voltage Accuracy
a. Performance Check
(1) Connect calibrator OUTPUT to TI INPUT terminal and connect multimeter to
TI rear panel DC OUT terminal.
(2) Set TI RANGE switch to .01 VOLTS and set calibrator for a 10 mV, 400 Hz
output. If multimeter does not indicate -1.0 ( .01) V, perform b (1) and (2) below.
(3) Adjust calibrator for a TI indication of 1 on the 0-to-1 scale. Calibrator Error
display will be < 1.0%; if not, perform b (3) through (7) below.
(4) Set TI RANGE switch to 1 VOLTS and set calibrator for a 1.0 V, 400 Hz output,
then adjust calibrator for a TI indication of 1 on the 0-to-1 scale. Calibrator Error display
will be < 1.0%; if not, perform b (8) below.
(5) Reset calibrator and remove multimeter from equipment set-up.
(6) Connect ac divider INPUT (p/o calibrator) to calibrator OUTPUT terminals
and ac divider OUTPUT to TI INPUT terminal.
(7) Set TI RANGE switch and calibrator initial output as indicated in table 3.
Adjust calibrator for the TI meter indication specified. Calibrator Error display will
indicate within the specified limits.