Reference evapotranspiration (ET)

Reference evapotranspiration (ET) can be computed for RX stations if data are available from sensors.

Table 5‑1. The Reference Evapotranspiration interface provides the following fields. All fields are required.
Field Description
Device A device serial number and possibly sensor number for the measurement. LI-COR Cloud uses this name to identify the measurement
Configuration Name A memorable name that can help you identify the configuration
Time frame Reference ET can be summarized either hourly or daily
Time Zone The time zone where the measurement is taken
Temperature Sensor Sensor that contributes the air temperature measurement
Relative Humidity Sensor Sensor that contributes the RH measurement
Solar Radiation Sensor Sensor that contributes the solar radiation measurement
Wind Speed Sensor Sensor that contributes the wind speed measurements
Wind Speed Sensor Height Height above ground for the wind speed sensor
Sensor Height Units Units for the wind speed sensor height above ground
Latitude Degrees between -90 and 90
Longitude Degrees between -180 and 180
Elevation Above Sea Level Elevation
Elevation Units Units for elevation

Configuring the reference ET measurement

To create a calculated measurement for reference evapotranspiration:

  1. Select Data > Calculated Measurements and click +Create Calculated Measurement.

    The reference ET calculated measurement is under the data tab.

  2. Select Ref Evapotranspiration and click Next.

  3. Configure the settings for the measurement.

  4. Save the settings.

Now you can configure alarms and view data directly on the devices tab or add the calculated measurement to a Dashboard and view the data in a Widget (see Creating dashboards).

Configuring a reference ET alarm

To configure an alarm for the calculated measurement, click + Add Alarm in the interface:

An alarm for reference ET can be configured under alarms.

Be sure to Save the settings.