With 3 to 8-part dosing, the ratios may be varied to suit a feeding schedule as recommended by the nutrient supplier. In this case the ratios between all the nutrient parts can be individually varied.
It is important to note, that when using variable ratios for the various nutrient part, the dose time must be set to be long enough that the part with smallest ratio still gets a dose of at least one second.
When set for more than 2 nutrient parts the dose interval must be set for greater than 0 seconds.
To set manually
Calibrate the EC and pH sensors (instructions provided in links below):
In “Configure” on the controller, set required nutrient parts.
In Dosing settings set the desired EC, pH and pH raise or lower (if controlling pH).
In Dosing settings set the EC dose time. This should be set so that each dose raises the EC by about 0.1mS/cm (1CF or 50ppm).
In Dosing set the pH dose time so that each dose alters the pH by about 0.1pH.
In Dosing settings select either pH raise or pH lower. The most usual selection is pH lower (acid dosing) and if you are unsure then select this. If you find that the pH continually drifts down below 5.5pH then change this to pH raise and ensure that you have a dosing pump connected the pH raise output and to a stock tank containing pH raise (alkali).
In Dosing settings set the dose interval. This is the time taken for each dose to mix in and for the EC and pH readings to stabilise. For a small system, 2 or 3 minutes is typical. Larger systems may require 10 minutes or more. Note that dosing will not occur unless the reading has been below the setpoint continuously for this amount of time.
To set via Edenic
Select Controller and navigate to Device Settings, select the 'Dosing' tab.
In Dosing tab set the number of nutrient parts and ratio mix, remembering to leave at least 1 pump set to 100%, then submit changes to device. You may need to remove some outputs like irrigation or pH control to allow for more nutrient parts. If not enough output are available (available outputs shown on the bottom of the tab) view the Wiring Diagram before making changes to see current configuration. Removing installed outputs is done through each of the settings tabs for the controller in Edenic.
In the 'EC Settings' tab set the required EC and dose time. This should be set so that each dose raises the EC by about 0.1mS/cm (1CF or 50ppm)
In 'pH Settings' tab set the required pH and dose time so that each dose alters the pH by about 0.1pH. In 'pH Settings' also select the pH Control direction to either pH raise or pH lower. The most usual selection is pH lower (acid dosing) and if you are unsure then select this. If you find that the pH continually drifts down below 5.5pH then change this to pH raise and ensure that you have a dosing pump connected the pH raise output and to a stock tank containing pH raise (alkali).
In the 'Device Settings' tab set the dose interval. This is the time taken for each dose to mix in and for the EC and pH readings to stabilise. For a small system, 2 or 3 minutes is typical. Larger systems may require 10 minutes or more. Note that dosing will not occur unless the reading has been below the setpoint continuously for this amount of time.
To set via IntelliGrow
Under 'Functions' in IntelliGrow, select required number of nutrient parts. You may need to remove some outputs like irrigation or pH control to allow for more nutrient parts. If not enough output are available (available outputs shown under 'OUTPUT FUNCTIONS') view the Wiring Diagram before making changes to see current configuration. Removing installed outputs is done by uninstalling outputs in the 'OUTPUT FUNCTIONS' Section..
In Dosing settings set the desired EC, pH and pH raise or lower.
In Dosing settings set the EC dose time. This should be set so that each dose raises the EC by about 0.1mS/cm (1CF or 50ppm).
If controlling pH in dosing set the pH dose time so that each dose alters the pH by about 0.1pH.
In Dosing settings select either pH raise or pH lower. The most usual selection is pH lower (acid dosing) and if you are unsure then select this. If you find that the pH continually drifts down below 5.5pH then change this to pH raise and ensure that you have a dosing pump connected the pH raise output and to a stock tank containing pH raise (alkali)
In Dosing settings set the dose interval. This is the time taken for each dose to mix in and for the EC and pH readings to stabilise. For a small system, 2 or 3 minutes is typical. Larger systems may require 10 minutes or more. Note that dosing will not occur unless the reading has been below the setpoint continuously for this amount of time.
A schedule may be added with IntelliGrow which will automatically vary the nutrient ratios and EC as required. This can be used to gradually and automatically change the mix from vegetative to generative whilst at the same time gradually changing the EC.
Note, on each date specified, the settings change to the new values and then stay at these settings until the next date in the schedule is reached.
Once the last entry is reached the settings just stay at those values permanently.