TM 5-3895-373-207.8. ADJUST/CALIBRATE CONTROL HANDLES - Continued.A. CALIBRATE - Continued.3. CALIBRATE LEFT CONTROL HANDLE REVERSETHRESHOLD AND GAIN.a. Disconnect electrical connector P31 (3) greenand white wires) on left control handle (4) fromelectrical connector J31 (5).b. Insert positive digital multimeter lead intoterminal B on electrical connector P31 (3).c. Insert negative digital multimeter lead intoterminal B on electrical connector J31 (5).d. Move left control handle (4) 0.75 in. (19 mm)from neutral to reverse position. Use acombination square and the top of the handle asreferences.e. Digital multimeter should read 6 to 8 mA.NOTEThe forward threshold potentiometer(FT) and the maximum forwardthreshold potentiometer interact on eachother. An adjustment to eitherpotentiometer will require the othersetting to be checked.f. If meter reading is less than 6 mA or greaterthan 8 mA, using a jeweler’s screwdriver, adjustleft control handle (4) reverse thresholdpotentiometer (RT) until a reading of 6 to 8 mA isobtained. To increase mA reading, turnadjustment screw clockwise. To decrease mAreading, turn adjustment screw counter-clockwise.g. Move left control handle (4) to full reverseposition.GO TO NEXT PAGE7-72
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