NMC-PRO Installation Manual
120Page
11.8 EC Pre-Control Configuration
• EC Pre-Control Configuration:
EC Pre-Control Runtime: Set the time it takes the EC Pre-Control valve to shift from fully closed to
fully open. This parameter is very important and must be exact as the controller uses this parameter to
calculate the opening percentage of the EC Pre-Control valve.
EC Pre-Control Control Cycle: Set the time it takes since the EC Pre-Control valve changes position
until the change is measured by the EC Pre-Control sensor.
Coarse Tuning: Coarse Tuning is used to adjust control speed and strength. A higher value will result
in faster correction but might lead to over-closing, a lower value might result in slow reaction.
Fine Tuning: Fine Tuning is used to fine tune EC Pre-Control behavior.
• EC Pre-Control Pump:
Start With First/Last Device: Define whether the EC Pre-Control Pump should open with the first or
the last device of the irrigation (refer to table 1.3 to see device startup order).
Off Delay: Define Off delay (if required) for the EC Pre-Control pump.
11.9 Drainage Configuration
• Ratio: Define volume per pulse of the drainage meters (liter/pulse or gallon/pulse).
• On Delay: Define how long a valve, which is configured to this drainage measurement, should be open before
the measured drainage is related to this valve. All drainage measured before this time has elapsed (although
the valve is open) will still be related to the previous opened valve that was configured to this drainage sump.
• Off Delay: Define how long after irrigation has finished, the measured drainage should still be related to the
previous irrigation. This value is used to “tell” the NMC when to stop relating drainage to the previous irrigation
and write it to all relevant history tables.
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