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About the LEIT RC2-ET Environment Features (LEIT-2ET only)
The ENVIRONMENT menu is used to activate and set the ET feature, adjust
budgets, and set wind and rain gauge sensors. The ET MONITOR screens are
used to input site information for each zone which is then downloaded to the
LEIT-2ET controller. With the ET data received from the weather station the
LEIT-2ET controller calculates the hourly and daily local microclimate and adjusts
or overrides the daily scheduled irrigation program.
ET Edit can be used to edit ET settings from 10% to 200%. The Budget feature is
used to reflect seasonal changes by adjusting each month’s irrigation schedule
by percentages from 10% to 200%. The Rain Gauge setting is used to select
rainfall amounts from 1/8” to 1” (3 mm to 25 mm). This data, coupled with
information provided by the weather station, will adjust or override the irrigation
program. Wind Speed information provided by the weather station overrides
irrigation when wind speeds ranging from 8 to 25 MPH (3.5 - 11.1 m/s)
are reached.
How DIG’s Weather Based System Works
As daily ET accumulates, ET value, along with site information and microclimate
coefficients are used to determine plant water requirements and allowable soil
depletion rate. System run time is set and based upon the irrigation method
along with application rate and site information water requirements. When ET is
active, this calculated run time replaces or overrides the program duration that
the user set originally.
In activating ET the user enters detailed information on each site zone to the
LEIT RC2ET handset. This information includes mature or new planting, soil
type, plant type, plant density, slope, microclimate type, irrigation method,
irrigation efficiency, flow rate and spacing if available. Based on the user
input and the information collected hourly from the weather station sensors,
the controller performs the daily calculations needed to override or adjust the
scheduled irrigation program specifically for each zone, to compensate for
