Link4 iGrow 100 Series Installation And User Manual page 94

DIF is a third time window in a 24 hour period that you can elect to use to control the
humidity separately from the other two periods.
1.2.3.1.
The default for the DIF humidity setpoint is OFF. Pressing the tab will enable the setting
of a DIF time period humidity setpoint.
1.2.3.2.
The Humidify Setpoint is the low humidity target below which the humidification stage is
engaged during the DIF time period.
1.2.3.3.
The Dehumidify Setpoint is the high humidity target above which the dehumidification
stages are engaged during the DIF time period.
1.2.3.4.
1.2.3.4.1.
1.2.3.4.2.
This is the time that the DIF setpoints are invoked.
1.2.3.4.2.1.
The start time is either a fixed (absolute) time or it can vary daily based on the increase
or decrease in day length. The day length is an Astronomic Adjustment based on the
latitude and longitude entries that you made.
1.2.3.5.
1.2.3.5.1.
The Ramp Time enables a smooth transition between the humidity targets. If the ramp
time is set to 0, there will be an immediate step transition in the humidity setpoints from
the previous to the current setpoint of the following period. If the ramp time is not zero,
the ramping begins at the end of the period
1.2.3.5.2.
For the dehumidification case, this is the humidity drop below the dehumidification
boundary where the dehumidification stage terminates.
iGrow Series 100 Manual
On / Off
Set Humidify Setpoint
Set Dehumidify Setpoint
Set Time
Set DIF Start Time
Sun Based or Absolute
Advanced
Ramp
DeadBand
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