8.0 ET PROGRAMMING
Rain Master Eagle User Manual
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8.6.2 Manually Entered ET
The user has the ability to manually enter daily ET information at any time. When used in
conjunction with Historical ET, the user can manually input an ET value to account for extreme
conditions such as unusual hot or cold spells, etc. In some communities (especially Agricultural)
this data may be available in local newspapers, via the radio, or even reported as part of the local
weather report. By utilizing manually entered ET data in conjunction with historical ET data a
more exact picture of the irrigation needs can be defined.
The controller is designed to utilize the manually entered ET value for a period of one week. The
controller will automatically revert back to the use of Historical data, or any other selected ET data
source, after this time period.
Manual ET data can be entered at any time; each time it is entered it will over-write the last data
value that was stored and supercede all other ET data sources.
Please refer to section 7.6 MANUAL ET DATA for detailed specifics on entering manual ET data.
!
Historical ET data should always be entered into the controller when using the
controller in the ET mode. In order to ensure that the controller intelligently irrigates
in the event that the user is unable to enter a manual value, it is important that the
historical ET be entered as a fallback.
8.6.3 Weather Station generated ET
The most accurate mechanism for supplying ET data to your Rain Master Eagle controller is
with a Rain Master Weather Station properly installed within the irrigated area. A local weather
station is capable of measuring ET data based upon your specific microclimate. Because the
weather station is capable of measuring ET in the nearest one hundredth of an inch and the data
is measured in real time, on a continuous basis, your Rain Master Eagle can respond to changes in
weather conditions immediately.
!
In order to ensure that the controller intelligently irrigates in the event that the Weather
Station fails, it is important that the Historical ET data be entered as a fallback. A
Weather Station failure is declared by the controller if the weather station reads a total
of 0.0 ET for the 24 hour accumulation period (midnight to midnight).
When this occurs, the Historical ET data will be automatically used for the tomorrow’s
ET calculations. In climates that have significant rain, it may be possible to have a
legitimate ET reading of 0.0.
Usage of a rain sensor connected to the controller’s sensor input terminals is
recommended for these installations.
To enable the Rain Master Weather Station as the ET data source device refer to 7.5 WEATHER
STATION.
8.6.4 ET Data from the Internet
Your Rain Master Eagle controller can be configured with a communications card (iCentral card)
to allow it to be controlled and manipulated over the Internet using Rain Master’s web site www.
rainmaster.com. As part of the service you may optionally elect to have ET data sent to your
controller on a daily basis. Refer to paragraph 6.12 COMMUNICATIONS (ENABLING) in
order to enable Internet communications.
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