Yara N-Sensor V3.10
Operation Manual
Relative biomass cutoff:
If the current sensor value is lower than the given percent-
age of the average sensor value, the crop density is regarded as too low to apply
the full nitrogen rate. Instead, the rate will be reduced with decreasing sensor
value. On the work screen, the “low crop density” icon is displayed. A default value
of 50% should be applicable to most conditions.
Press
OK
to reset the internal calibration parameters and return to the main
menu. This button must be pressed to confirm the settings and start the
automatic calibration. If the
Up
buttons are used to return to the main menu, the cali-
bration is not reset and the target rate will not apply.
5.3.2
Target rate operation
Once the agronomic calibration has been completed, the system is ready for
application. When the
Start
button on the work screen is pressed, the system
will immediately start to apply the target rate. At the same time sensor readings are col-
lected to continuously recalculate the actual field average and the application rates
may deviate from the target rate whenever the current sensor reading is different from
the actual average.
On the work screen, the distance driven (DST) and the average N-Sensor value (REF)
are displayed continuously. The distance is calculated from the GPS data. If no GPS is
connected, a standard speed of 3 m/s is assumed.
Calculated application rates are continuously sent to the spreader controller and all
relevant data is logged to the log-file that is linked to the selected task. The main menu
bar displays the following options:
Uniform:
Pressing the
Uniform
button changes the application rate to the
Target rate
setting made in the
Agronomic calibration
menu. In this case, the application rate is
flashing and the “uniform” icon is displayed to remind that the rates are not based
on the N-Sensor reading.
Driven
distance [m]
Current N-Sensor
value
Average N-Senor
value so far
Last revised: 28.01.2009 14:39
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