User Manual
Page 29
• VPD Sum Limit: This parameter determines the minimal (accumulated) VPD required for irrigation to start.
• Minimum Time: When irrigation begins, NMC Pro erases the current VPD sum and restarts the count.
Minimum time is the minimal amount of time between irrigation starts, even if the radiation sum has reached
its limit.
• Maximum Time: This parameter determines the maximum amount of time between irrigation starts, even if
the VPD limit has not been reached.
2.7 16BIntroduction to the Influence Program
Irrigation Pro enables adjusting irrigation settings according the following factors (labeled “Influences” on the screen):
• Solar radiation
• Amount of drainage
• Amount of fertilizer present in the drainage
• VPD
• Temperature
These Influences can adjust the following irrigation settings:
• EC
• Radiation Sum (RadS)
• Minimum Rest Time (MinT)
For example, a grower may want to increase the EC based on the Solar Radiation. Alternatively, he may want to
decrease the MinT based on the drainage.
2.8 17BUsing the Influences
• Set an Influence to increase or decrease the setting.
• Changes to the setting are in percentages (for example, a 10% increase in the EC level).
• Several Influences adjust the EC setting. The final adjustment amount is based on the sum total of the
different Influences.
• You enter up to three points for each Influence setting. Irrigation Pro automatically calculates the curve based
on these points.
• You can program up to 15 different programs (corresponding to the 15 irrigation programs)
• After configuring an Influence, you must enable it (under ACTIVE/SOURCE).
2.8.1 57BSetting the Influences
1. Go to Install > Device Layout.
2. Define relays as dosing channels, as required.
3. Go to Program > Irrigation.
4. Using the arrow keys, scroll down to Screen 2. The following screen appears.
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