TB 9-6625-1098-24
NOTE
Ensure SENSITIVITY VERNIER control remains fully cw
throughout paragraph 13.
(3) Adjust calibrator frequency to 400 Hz and amplitude for a 0.01 V indication on
TI meter.
(4) Set FUNCTION switch to SET LEVEL. TI meter will indicate at least 0.01 V.
NOTE
SENSITIVITY switch position will be referred to as follows:
position 6 (MAX), ccw through position 1 (MIN).
(5) Set SENSITIVITY switch ccw one position (to position 5).
(6) Adjust calibrator frequency to 400 Hz and amplitude for TI meter indication of
0.94 on 0 to 1 scale. Set the reference level on calibrator by pressing the NEW REF key.
(7) Adjust calibrator frequency to 100 kHz and output amplitude for 0.0% error
display reading. If TI meter does not indicate between 0.92 and 0.96 on the 0 to 1 scale,
perform adjustments listed in table 4.
(8) Repeat (6) and (7) above for SENSITIVITY switch positions in table 4,
increasing calibrator output for each respective decrease in SENSITIVITY position. If TI
meter does not indicate between 0.92 and 0.96 on 0 to 1 scale, perform adjustments listed in
Table 4. Test Instrument Sensitivity Switch Adjustments
SENSITIVITY
Adjustments
Test instrument
switch positions
meter indications
5
S2C5 (R)
0.94
4
S2C4 (R)
0.94
3
S2C3 (R)
0.94
2
S2C2 (R)
0.94
1
S2C1 (R)
0.94
b. Adjustments. No further adjustments can be made.
14. Frequency Dial Accuracy
a. Performance Check
(1) Connect calibrator OUTPUT to TI INPUT.
(2) Position TI controls as listed in (a) through (f) below:
SENSITIVITY switch to position 5.
(a)
METER RANGE switch to .3 VOLTS.
(b)
FREQUENCY RANGE switch to X1K.
(c)
FREQUENCY dial to 5.
(d)
BALANCE controls to midrange.
(e)