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PROGRAM MENU
a. Define the EC Drain percentage set points.
b. Define the EC percentage set points.
8. Set ACTIVE/SOURCE to Yes.
9. Press Menu and confirm changes.
10. In Program > Dosing Program set the Target EC.
Note: You can disable this function by disabling EC Control (Configuration > Dosing Configuration).
Example: A user wants to maintain an EC level of 1.5. To this end, he measures the drainage EC. When the drainage
EC level falls below 1.5, he increases the EC input. As it rises above 1.5 ms/cm, he decreases the EC level.
5.2.2.5 VPD Influence on Target EC
You can adjust the EC based on the VPD Sum (air temperature and humidity). As the VPD rises or falls, the program
can increase or decrease the EC level according to your requirements.
1. In Installation > Analog Input:
a. Define a sensor as EC
b. Define an air temperature sensor
c. Define a humidity sensor
Note: You can verify the EC status using Hot Key Screen, the temperature and humidity sensors status using Hot
Key Screen 6.
2. In Setup > VPD Sensor Setup, enable VPD Temperature and VPD Humidity sensors.
3. In Configuration > Dosing Channel Configuration set React to EC.
4. In Configuration > Dosing Configuration > EC Control, set EC Control to Yes.
5. In Program > Irrigation, select VPD/EC.
a. Define the VPD sum points.
b. Define the EC percentage set points.
6. Set ACTIVE/SOURCE to Yes.
7. In Program > Dosing Program:
a. Set the Target EC
b. Set EC Dosing Method to Pr. Qty.
Example: A grower wants to lower the EC level as the VPD decreases. He sets this screen to reduce the increase in
EC level to match the decreasing VPD levels.
DATE: 2 –Feb-12
IRRIGATION PROGRAM
Program:
1
Priority: --
INFLUENCE
TABLE
Radia./EC
EC Drain / EC
Drain/RadS
mS/cm
Drain/MinT
1
EC Drain/EC
2
VPD/EC
3
Temp/EC
Screen 2 of 2 – In order to view the
TIME 12:52-08
Const.
0%
ACTIVE/SOURCE
(%)
-5
-10
-15
NMC-PRO Installation Manual
Page
63
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