TB 9-4920-362-35
Table 5. Valve Current Meter
Digital multimeter connections to SAS
TRIM COIL SELECT
Digital multimeter
ACTUATOR end of cable W2
switch positions
indications (mA)
mA
LOW
Min
Max
Pin 2
Pin 1
1
-9.50
-10.50
Pin 2
Pin 1
2
0.0
0.0
Pin 2
Pin 1
BOTH1
+9.50
+10.50
Pin 3
BOTH2
-9.50
-10.50
Pin 4
Pin 3
BOTH1
+9.50
+10.50
Pin 4
1Adjust
CURRENT CONTROL toward DECR until valve current meter indicates +10.00 mA.
2Adjust
CURRENT CONTROL toward INCR until valve current meter indicates -10.00 mA.
b. Adjustments
(1) Set AC POWER switch to OFF.
(2) Remove TI from protective case.
(3) Set AC POWER switch to ON.
(4) Adjust CURRENT CONTROL until digital multimeter indicates 0.000.
(5) Adjust R15 (under circuit board, right front) until valve current meter indicates
00.00 with flashing polarity (R).
10. Final Procedure
a. Deenergize and disconnect all equipment and if required reinstall protective cover
on TI.
b. When all parameters are within tolerance, annotate and affix DA Label 80 (US
Army Calibrated Instrument). When the TI receives limited or special calibration,
annotate and affix DA Label 163 (US 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
resources, annotate and affix DA Form 2417 (US Army Calibration System Rejected
Instrument) and inform the owner/user accordingly in accordance with TB 750-25-1.
7
