Dosing - Agrowtek GrowControl GCX Instruction Manual

Dosing

Nutrient dosing functions on the GCX control system are designed for injecting nutrients and controlling pH
in stock tanks. Nutrient dosing can be managed in several di erent ways from a GCX controller:
• Recirculating mode which adds doses as pH or EC change.
• One-shot mode which performs a fixed dose from a recipe.
• Inline mode which doses according to flow rates measured by a flow meter (in development.)
Three components are necessary to operate the dosing function:
• SXH or PHX series hydroponic sensor transmitter is used to monitor the water conditions.
SXHF model with ow meter required for inline dosing mode.
• ADi series peristaltic dosing pumps are used to inject nutrients, ph buffers and ORP solutions.
• Recipes designate the dosing targets and component properties for the rule to use.
Recipes can contain up to 6 nutrient parts, 2 pH parts and one ORP part.
How to setup the dosing function:
1. Assign a sensor and dosing pumps for the function to use on the equipment tab. 1. Assign a sensor and dosing pumps for the function to use on the equipment tab.
2. Create rules and select recipes to use.
Sensor & Pump Con guration
The equipment tab contains settings for the dosing modes and assignments for the hydroponics sensors
and chemical dosing pumps. These settings are used for all of the rules in the dosing function.
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1. Dosing Mode
2. Hydroponics Sensor
3. Auto Dose Delay
4. Stop on Alarm
5. Nutrient Pumps
6. pH/ORP Pumps
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Recirculating: Doses injected when pH/EC outside of setpoint/deadband.
One-Shot: Fixed amounts injected when the rule is activated.
Inline Flow: Chemicals injected according to ow rate reading.
Select the hydro sensor for the function to read pH, EC and ORP (if available.)
When in recirculating mode, delay dosing after rule is activated.
If an alarm is active on the hydroponics sensor, stop the dosing function.
Area to assign dosing pumps for the function.
Area to assign pH and ORP dosing pumps for the function.
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