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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
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evapotranspiration (ET). The result can be reviewed in the REPORTS MENU,
STATUS REPORT and HISTORY REPORT.
NOTE: The controller can receive information from more than one weather
station in the area if available.
7.
How to Program and Activate ET
1. Setting and Activating ET:
Using the ET MONITOR feature in the ENVIRONMENT screen, the user can
enter detailed site information to each zone (valve #) and download this
information to the LEIT-2ET controller. The controller use the information
received from the handset and the weather station to adjust the daily irrigation
schedule. The effect on the daily scheduled irrigation programs based on
weather data collected can be reviewed in the REPORTS MENU and HISTORY
Report.
Activating ET: Using this feature the user enters detailed information for each
valve or site zone.
Follow theses steps to configure each zone setting conditions using the
handset ET MONITOR screens:
Step 1: Select plant stage of life (example: mature)
Step 2: Select soil type (example: clay)
Step 3: Select plant type (example: mix planting)
Step 4: Select plant density (example: 50-70%)
Step 5: Select percentage of slope (example: 0 to 4%)
Step 6: Select microclimate type (example: open space)
Step 7: Select irrigation method (example: spray)
Step 8: Select irrigation efficiency (example: 70%). This is the default
setting that can be changed.
Step 9: Select irrigation method flow rates (example: 1 GPM (3.8 L/M)
Step 10: Select irrigation method spacing (example: 10' (3 m)
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