TB 9-6625-2107-24
8. Range Accuracy and Stability
a. Performance Check
(1) Connect calibrator OUTPUT terminal to TI INPUT terminal.
(2) Set RANGE switch to 1 VOLT.
(3) Adjust calibrator frequency for 1 kHz and OUTPUT for indication of 1 on TI 0
to 1 scale. Calibrator will indicate 0.99 to 1.01 V ac; if not, set calibrator OUTPUT to 1 V ac
and adjust A2R38 (fig. 1) for indication of 1 on TI (R).
(4) Connect ac voltage divider INPUT (p/o calibrator) to calibrator OUTPUT
terminals and ac divider OUTPUT to TI INPUT terminal.
(5) Set RANGE switch to .001 VOLTS.
(6) Adjust calibrator OUTPUT for indication of 1 on TI 0 to 1 scale. Calibrator will
indicate 0.99 to 1.01 V ac; if not, set calibrator OUTPUT to 1 V ac and adjust A2R44 (fig. 1)
for a 1 indication on TI (R).
(7) Set TI RANGE and calibrator initial OUTPUT as indicated in table 3. Adjust
calibrator for the TI meter indication specified. Final calibrator Error display indication
will be within the specified limits.
NOTE
In table 3 below where `- -' appears in "Meter indications"
column and 'N/A' appears in "Error display" column, a
reference point is being established on the TI to be used in
paragraph 9 below. TI accuracy is not being verified at these
points.
b. Adjustments. No further adjustments can be made.
