38
NETAJET
™
4G INSTALLATION MANUAL
DOSING CALIBRATION
If the EC and pH target values cannot be attained, and the dosing valves are opened more than 85%,
measures should be taken to increase the dosing ratio - if feasible, slightly increase the concentration of
the fertilizer solution and/or reduce the water flow rate to the field during irrigation.
If not - consult the agronomist/consultant.
In a field where the flow rate changes significantly from one irrigation shift to the next, try to be at a
minimum of 50% opening of the dosing valve for the low-flow-rate shift, and a maximum of 80% for the
high-flow-rate shift.
When the calibration process is completed, return to the EC and pH control screen in the controller,
define the deviation in EC and pH values for the channels and switch the EC and pH control to ON
(NMC Pro - screen 7.7-7.6).
In the EC and pH alarm definitions, define the EC and pH deviation from the target values that, if attained,
will trigger the alarm and set the EC and pH alarm to the ON position (activated)
(NMC Pro - screen 3.5-3.6).
NOTE
EC and pH values must not exceed a ±30% deviation from the target values.
ATTENTION
Once a month, read the measured flow rates of the dosing channels and compare them with
the flow rates defined in the controller, in order to check whether changes have occurred
(NMC Pro - screen 7.6).
After completing the calibration process, fill in the NetaJet™ 4G Hydraulic Conditions Checklist (User
Manual, page 45) in three copies. Make sure to fill in all the boxes in the reference row.
The NetaJet™ 4G User Manual is provided with the NetaJet™ 4G and downloadable at
https://www.netafim.com/en/digital-farming/netbeat/Fertigation/netajet/
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