5.6.1 Even fertiliser dosing
Due to differences in viscosity, some fertilizers may flow through the venturi faster
than others. This can cause uneven dosing. This can be prevented by opening or
closing the needle valves (loosen the knob on the front of the needle valve to access
the adjuster screw). This ensures that the liquid levels in all dosing channels are the
same and operating at the capacity set (see section "Software configuration" on
pageî31). The liquid level can be read using the sight glass in the dosing channel.
Figure 5-3: Fertilizer dosing
No. Name No. Name
1 Needle valve 2 Sight glass / flowmeter
5.7 Testing the HortiJet
To test the HortiJet, you can initiate a short irrigation cycle. Please check the
following:
1. Is water flowing through the main irrigation pipe and through the HortiJet?
2. Is the HortiJet pump working without excessive noise?
3. Are fertilizers (and acid) being dosed? You can check this by looking at the sight
glasses on the dosing channels.
4. Are the EC, pH and flow meters showing realistic values?
5. Are the EC and pH setpoints (target values) being achieved?
6. Is the right amount of water being irrigated?
7. Are there any alarms?
HortiJet Pro
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