Programming instructions

8 Designer’s Guide
Calsense
Daily ET
The ET2000e can irrigate based on real-time evapotranspiration (ET) allowing the controller to
automatically calculate each station’s run time before irrigation. This ET data can come from an on-site
ET Gage (model ETG), a Campbell Scientific Weather Station (model ET107), or the WEATHERSENSE
feature of Command Center.
At the start of an irrigation day, typically 8:00 PM, the previous day’s ET value is stored for historical
purposes. The controller then uses the new daily ET value to calculate each station’s irrigation time based
on the total ET for all days since the last irrigation. Using a daily ET factor, each station can be adjusted by
the user to compensate for considerations such as soil conditions, exposure, and plant material.
For more information about the various methods of retrieving real-time ET, see Weather Sensors
on
page 35.
Reports
The ET2000e Irrigation Controller includes a wide range of water reports available directly at the
controller. Available reports include:
• A summary of this month’s usage compared to last month’s usage
• A 24-month summary
• A water usage versus budget report
• A complete station-by-station history which includes the date and start time of each cycle,
programmed minutes, programmed inches, number of cycles, actual flow rate, expected flow
rate, and any alerts that occurred during irrigation.
Additional reports can be viewed and printed from the Calsense Command Center Software, purchased
separately.
Master Valve Output
The master valve output provides a 24 Volt AC (VAC) source to operate an irrigation system using a
master valve. A master valve is necessary if the irrigation system is to have mainline break protection.
The multiple Flow Meter interface (model -F) provides support for two additional master valves, for a
total of three per controller. For irrigation systems where multiple controllers share one or more master
valves, the FLOWSENSE® option (model -FL) should be used.
For more information about using multiple master valves on a single controller, see Flow Meters
on
page 27. For information about Sharing Points of Connections
, see page 23.
Moisture Sensing
The ET2000e Irrigation Controller can use Calsense Soil Moisture Sensors (model 1000-S) to
automatically determine the appropriate irrigation time for each station based on the moisture content
in the soil. To accomplish this, the user sets a threshold using a history of moisture readings. During
programmed irrigation, the controller irrigates each station until the moisture content reaches the user
setpoint. The controller then stops watering that valve and any that share that same moisture sensor
until the next scheduled irrigation.
For more information about using moisture sensors, see Soil Moisture Sensor (model 1000-S)
on page 39.
Pump Start Output
The Pump Start output provides a 24 VAC source to activate a pump start relay for systems requiring a
non-variable frequency drive (VFD) pump. Because this pump is set by program, the pump may turn on