ARAG 46742DX1, Installation, Use And Maintenance Manual

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11.8 - Speed
Fig. 188
The information about the speed is usually received by the GPS connected to Bravo 400.
Without signal from GPS this menu allows to select the wheel sensor as alternative source, and calculate data
according to the inputs received by the speed sensor on the wheel.
This menu is displayed ONLY when the wheel sensor is
Enabled
(par. 10.10).
11.8.1 Source
Fig. 189
It allows to select the source to calculate the speed.
When the item
Maximum speed alarm
is set, the speed is calculated with the inputs coming from the speed
sensor installed on the wheel.
Set the wheel constant with the menus
Wheel constant
or
Constant calculation
.
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.
Wheel constant
It allows to enter the wheel constant value calculated with the suitable formula.
The wheel constant can be calculated with a good approximation detecting the distance travelled by the wheel with the speed sensor.
The longer the distance travelled, the more accurate wheel constant calculation.
Fig. 190 Fig. 191
Select the item
Wheel constant
and enter the calculated value.
Kwheel =
distance travelled (cm)
no. of detection points x wheel rpm
<distance travelled>
, 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.
Constant calculation
It allows to calculate and save the wheel constant with the formula below:
Fig. 192 Fig. 193
- Measure a straight path at least 100 m long.
- Select the item
Constant calculation
(Fig. 192) and press
OK
;
- The screen in Fig. 193 will be automatically displayed:
enter the
Reference distance
to be covered and press
OK
.
The message will be displayed
Drive trough setted distance and press OK key
- Travel the required distance. When finished, stop the tractor.
- Press
OK
to stop counting: the computer will show the calculated
constant. Wheel constant has been stored.
USER MENU - SPEED
Par.
9.4
Exit
function or
datum
change
Increase /
decrease
data Scrolling
menu
pages Shift
the
cursor
Confirm
access or
datum
change
Reset /
disable
data Scrolling
menu
items