APV – Technische Produkte GmbH
Original operating manual LF 600 M1
Page 21
5.7
Changing the spread rate during operation
By pressing the + or – key on the Main screen, the preset spread rate
can be changed in 5%-increments to a maximum of +/- 50%.
The change is shown on the Work screen:
5.8
Switching on the pump
By pressing the "Start metering unit" button (at the bottom right on the control box), spreading is started.
Based on the forward speed, the working width, and the set spread rate, the control box calculates the
required flow rate and adjusts the system accordingly. This can be seen by the fluctuating motor speed.
Slight fluctuations are normal here and show that the parameters are being continuously measured and
the system readjusted. If the pump is not able to reach or maintain the desired spread rate, a warning is
issued through a corresponding error message. If this should be the case, the nozzles must be adapted
to the application case.
5.9
Emergency operation
If there are difficulties with the flow sensor, it can be deactivated and the pump speed can then be
adjusted manually. To do so, the pulses per litre (see Point 5.4.4) must be set to 0. Then the motor
speed can be adjusted manually on the Work screen using the + and – keys.
Please note: The flow rate changes depending on the counter-pressure. If the spread rate needs to be
precisely maintained, the liquid must be collected at the nozzles and the spread rate per unit of time
must be checked. Feeding the liquid through the ball valve directly into a bucket does not provide
sufficiently accurate results, as there is no counter-pressure.
