Chopper Amplifier Sc-2000-U - Claas QUANTUM 3500 Service Parts

Electric System
1.4

Chopper amplifier SC-2000-U

Board layout
Potentiometer setting
12-8
QUANTUM
A Max. current potentiometer (I max.) = fast floor conveyor speed
B Response current potentiometer (I min.) = floor conveyor starts
C Ramp potentiometer (delayed or fast start of floor conveyor 0-5 sec.)
D Fuse 3.15 A (manufacturer: Wieckmann)
E LED lights up when power supply and fuse are o.k.
F LED (output check) lights up more intensely in relation to the output
current.
In general: Clockwise = more = +
Counterclockwise = less = -
Important: When turning counterclockwise, the potentiometers can be
turned beyond their limit stop.
1. Set potentiometer in switch console to max. position (10).
2. Switch on tractor pto.
3. Supply forage wagon with oil.
4. Connect multimeter (ampere) in series with the coil.
5. Adjust potentiometer B until the multimeter displays 1.9 A. Then slightly
back off potentiometer in switch console and watch for floor conveyor
speed to decrease visibly.
6. Set potentiometer in switch console to 1.5.
7. Adjust potentiometer B
and the floor conveyor starts.
8. Potentiometer C is not needed for the forage wagon, the potentiometer
therefore can be set to the left stop (i.e. direct start of floor conveyor).
The potentiometer influences the start time of the floor conveyor from
0-5 sec. (advantageous e.g. in case of a flywheel drive)
9. The board can be run at 1-35 V. LED E lights up when the power supply
and the fuse are o.k.
10. LED F lights up more intensely in relation to the amperage
(approx. 0.44 A to 1.9 A) output - coil.
until the multimeter displays approx. 0.44 A
[w1]
TIC
10/04