TB 9-6625-1213-24
WARNING
Selenium rectifiers are contained in this TI. When selenium
rectifiers burn out, poisonous fumes are released. Do not
inhale fumes or handle rectifiers until they have cooled.
NOTE
When indications specified in paragraphs 8 through 11 are not
within tolerance, perform the power supply check prior to
making adjustments. After adjustments are made, repeat
paragraphs 8 through 11. Do not perform power supply check if
all other parameters are within tolerance.
7. Equipment Setup
a. Remove protective cover from TI only to make adjustments. Replace immediately
upon completion of adjustments.
b. Connect TI to autotransformer.
c. Connect autotransformer to a 115 V ac source and adjust for 115 V ac.
d. Set TI power switch to ON and allow 10 minutes for warm-up.
8. Gain and Stability
a. Performance Check
(1) Connect function/arbitrary generator and multimeter to TI INPUT.
CAUTION
Do not set GAIN switch to 40 dB until instructed. Damage to
equipment may result.
(2) Set GAIN switch to 20 dB.
a 1 V indication on multimeter.
(4) Connect multimeter to TI OUTPUT. If multimeter does not indicate between
9.85 and 10.15 V, perform b (1) below.
(5) Record multimeter indication.
(6) Vary autotransformer from 105 to 125 V ac and back to 115 V. Multimeter will
indicate within 2 percent of indication recorded in (5) above.
(7) Connect multimeter to TI INPUT and adjust function/arbitrary generator
output for a 100 mV indication on multimeter.
(8) Set GAIN switch to 40 dB and connect multimeter to TI OUTPUT.
If
multimeter does not indicate between 9.85 and 10.15 V, perform b (1) and (2) below.
b. Adjustments
(1) Adjust R6 (fig. 1) for a 10-V indication on multimeter (R).