Priva NUTRIJET - The desired EC value is not being achieved; The desired pH value is not being achieved

The desired EC value is not being achieved
SolutionPossible cause
The desired value is higher than the value that can be
achieved with the fertiliser solutions.
• Correct the set value.
• Increase the concentration of the fertiliser solutions.
Prepare the irrigation water manually according to the
quantities in the nutrient recipe and measure the EC
value of the mixture. Enter this value as the EC value for
the nutrient recipe.
The EC value of the nutrient recipe has been incorrectly
set in the software.
Ensure that the concentrations of the fertiliser solutions
are correct.
The set value and the nutrient recipe are correct, but
the concentration of one or more fertiliser solutions is
too low.
Adjust the influence of the measured radiation on the
desired EC value.
In the software, the desired EC value is decreased by
the measured radiation.
Increase the quantity of fresh water compared to drain
water (if applicable).
The set value is correct, but is lower than the EC value
of the supply water.
See the solutions for the problem A fertiliser, acid or lye
is not being dosed (page 33).
A fertiliser is not being dosed.
Priva Partner: clean the EC sensors.The EC sensors are dirty.
Priva Partner: reset the P/I-factors.The P/I-factors of the EC control are set to a value that
is too low.
The EC value swings wildly and ‘overshoots’
SolutionPossible cause
Priva Partner: reset the P/I-factors.The P/I-factors of the EC control are set to a value that
is too high.
Prepare the irrigation water manually according to the
quantities in the nutrient recipe and measure the EC
value of the mixture. Enter this value as the EC value for
the nutrient recipe.
The EC value of the nutrient recipe has been incorrectly
set in the software.
Apply radiation decrease of the desired EC value.In the software, no influence has been set for the
measured radiation on the desired EC value.
The desired pH value is not being achieved
SolutionPossible cause
The desired value is unattainable.
• Correct the set value.
• Check if an incorrect tank or barrel has been
connected, which is causing lye to be mistakenly
dosed instead of acid or acid instead of lye.
• Check in the software if lye is mistakenly being
dosed instead of acid or acid instead of lye.
• Increase the concentration of the acid or lye.
Priva Partner: install a pre-treatment system for the
supply water.
The supply water contains too much bicarbonate.
Adjust the quantity of acid or lye in the nutrient recipe,
taking into account the quantity of bicarbonate in the
supply water.
The nutrient recipe has been set incorrectly.
The set value and the nutrient recipe are correct, but
the concentration of the acid or lye solution is too low.
• Check if lye is mistakenly being dosed instead of
acid or acid instead of lye.
• Ensure that the concentration of the acid or lye
solution is correct.
See the solutions for the problem A fertiliser, acid or lye
is not being dosed (page 33).
The acid or lye is not being dosed.
The pH sensors are dirty or worn out.
• Clean the pH sensors.
• Priva Partner: replace the pH sensors if cleaning
does not resolve the problem.
NutriJet - user - 00.00234
Priva