TB 9-6625-2097-35
(4) Set dc voltage standard for a pen deflection of 10 mm on recorder. If dc voltage
standard does not indicate between 0.1998 and 0.2002 V dc, perform b below.
b. Adjustments
(1) Disconnect dc voltage standard.
(2) Set RANGE switch to X.1.
(3) Connect digital voltmeter (A4) negative lead to TP7 and positive lead to TP6
(4) Turn SENSITIVITY control on front panel fully ccw. Adjust R230 ZERO (fig. 3)
for 0 +.005 V indication on digital voltmeter.
(5) Turn SENSITIVITY control on front panel fully cw, set S201 to DC INPUT
(right) (fig. 3), and short pins 1 and 2 of 101, using two leads (B5). Adjust R237 OFFSET
(fig. 3) for 0
.005 V
indication on
digital voltmeter.
(6) Set RANGE switch to X1 on front panel and set S201 to DC BAL (left) (fig. 3).
(7) Connect dc voltage standard to pins 1 and 2 of J-101, using two leads (B5). Set
dc voltage standard for 1.000 output. Record digital voltmeter indication.
(8) Reverse connection on dc voltage standard. If digital voltmeter does not indicate
voltage recorded in (7) above, adjust R224 DC BAL (fig. 3) for same reading within 0.002
V. Repeat (7) and (8) above until no further adjustment is needed (R).
(9) Adjust R229 SPAN (fig. 3) for digital voltmeter reading of 5 0.005 V (R).
(10) Adjust ZERO SUPPRESSION control cw to 100 percent, set ZERO
SUPPRESSION switch ON, and RANGE switch to X.1. Adjust R228 SUP ADJ (fig. 3) for 0
(11) Repeat (1) through (10) above to eliminate interaction.
15. Final Procedure
a. Slide all manual ink valves with tubing attached to OFF position on recorder (A6).
b. Deenergize and disconnect all equipment and reinstall protective cover on TI.
c. When all parameters are within tolerance, annotate and affix DA Label 80 (U. S.
Army Calibrated Instrument). When the TI receives limited or special calibration,
annotate and affix DA Label 163 (U. S. Army Limited or Special Calibration). When the TI
cannot be adjusted within tolerance, repair the TI in accordance with the maintenance
manual. When repair is delayed for any reason or the TI cannot be repaired with local
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