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 traveled> distance expressed in cm covered by the wheel along
measurement travel.
<no. of measurement points> number of measurement points (e.g. magnets, bolts,
etc.), mounted on wheel.
<no. of wheel revolutions> 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