ARAG GCS 3200 - Manual (Page 27)

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13.1.2 Source - Wheel sensor
Fig. 54
Selected wheel type : select the type of wheel (3 types available).
Wheels setting : set the wheel constant (3 available).
The constant can be inserted with two different procedures (manual or automatic),
described below.
Constant calculation: Manual It allows to enter the wheel constant value calculated with the suitable formula.
Take measurements with tyres at the operating pressure.
Kwheel =
distance traveled (cm)
no. of detection points x wheel RPM
distance expressed in cm covered by the wheel along
measurement travel.
number of measurement points (e.g. magnets, bolts,
etc.), mounted on wheel.
number of wheel revolutions required to travel
measurement distance.
The wheel constant can be calculated with a good approximation detecting the distance
traveled by
the wheel with the speed sensor.
(The longer the distance traveled, the more accurate the wheel constant calculation).
Select Wheel constant 1
, 2 or 3 and enter the calculated value.
Constant calculation: Automatic It allows to calculate and save the wheel constant with the formula below:
Fig. 55
Take measurements with tyres at the operating pressure.
This test must be performed on medium-hard terrain;
for application to very soft or very hard terrain, rolling diameter
may vary, leading to inaccurate output calculation; when this is the
case, repeat the procedure.
During the test, cover the distance with the tank filled up to half
capacity with water.
Fig. 56
- Measure a straight path at least 100 m (300 feet) long.: Reference distance (Fig. 56) .
(The longer the distance traveled, the more accurate wheel constant calculation).
- Select one constant, e.g.
Wheel 1 (Fig. 55) and press Calc. to gain access to the automatic setting function.
- Set the value of the Reference distance to be covered.
- Press F to start the counting.
- Cover the requested distance: the number of pulses will increase during the path. Stop the tractor at the end of the distance.
- Press
G to finish the counting. The computer will indicate the calculated constant.
Wheel constant has been saved.
Error: Inadequate number of pulses
Alarm displayed during the automatic calculation: repeat the procedure, the calculation is not valid.
USER SETTING