Power supply failure
In the event of an interruption to the power supply (or when switching off, using the emergency stop
for instance) the software settings and date and time are retained: the settings are saved
automatically.
After the loss of power, the process computer resumes the process at the point where it stopped
when the power was lost.
• Because the system pump stops prematurely during a power supply failure, the dosing
channels will not be post-purged and a sediment may be formed. When the power has
been restored, check therefore that the dosing channels are still functioning correctly.
• When the power has been restored, check if there are any alarms.
• If the power is lost for too long, you must use an alternative method to irrigate the crop.
Topping-up fertilisers and acid or lye
If the system is equipped with low level switches on the fertiliser tanks, the unit generates an alarm
if the fertiliser tank is in danger of becoming empty. However, it is best not to wait for this and to
top-up the fertiliser tanks early:
1. If there is a single fertiliser tank for the fertiliser concerned: interrupt the program that is running
(refer to Setting the unit to maintenance mode (page 26)).
If there are two fertiliser tanks for the fertiliser concerned: open the valve on the full fertilizer
tank that has already been prepared and close the valve on the fertiliser tank that is almost
empty.
2. Fill the almost empty fertiliser tank with a known quantity of fresh water.
3. Add a quantity of solid or concentrated fertiliser(s) or acid or lye that is appropriate to the quantity
of water.
4. Stir the contents of the fertiliser tank with an electric mixer until all solid matter has been dissolved
and the solution is homogeneous.
5. If you interrupted the program in step 1: resume the program.
• If you change the concentration of a solution in a fertiliser tank, then also adjust the
recipes for that fertiliser tank. It may also be necessary to readjust the EC control (for a
different concentration of fertiliser) or the pH control (for a different concentration of
acid or lye).
• If you are going to use higher concentrations, then take account of the highest
concentration to which the equipment is resistant. This applies above all to the acid
channel.
Adjusting the user settings
There is a large number of possible settings depending on the model, configuration and crop that
have been selected. The software manual for the process computer concerned contains a
comprehensive description of all possible user settings. Broadly speaking, it is a matter of:
• division of the irrigation valves and their linking to the start programs;
• recipes for the various irrigation valves (which fertiliser tanks are to be used for dosing and in
what ratio, the EC value and pH value and the quantity of irrigation water per irrigation cycle);
• start programs (criteria for starting and stopping the irrigation cycle).
Operation is described in the software manual for the relevant process computer (Connext or
Compass) and depends on the software version used. See chapter Procedures > Operating the dosing
unit.
Make (or arrange to be made) a back-up of all settings before adjusting them.
23NutriJet - user - 00.002
Operation
To Next Page
Loading...