Working with Calculated Channels in Dashboards

To create a calculated channel in dashboards:

  1. Click Dashboards and either click Create New Dashboard or click for an existing dashboard. Or, if you are currently viewing a dashboard, click and select Edit Dashboard. Note: You can choose any dashboard to add a calculated channel because it will be available from all dashboards once created.
  2. Under Calculated Channels, select “Add new calculated channels.”
  3. Under Select Formula, select the formula you want to use for the calculated channel.
    • For Accumulated Rain, type the channel label, select the rain channel, the time frame, and the time zone to use from the drop-down lists. Note: RX2100 and RX3000 stations have a separate accumulated rainfall sensor alarm that does not require creating a calculated channel in a dashboard. See Sensor Alarms for details on how to set this up.
    • For Dew Point, type the channel label, select the temperature and RH channels from the drop-down lists.
    • For Reference Evapotranspiration, create the channel via the HOBOlink main menu as described in Setting up Evapotranspiration Calculated Channels because this functionality will soon be retired in dashboards.

Note: If the sensor you select for a calculated channel has scaling configured, the sensor must be scaled to SI units for the measurement type (i.e. the scaled units must be millimeters instead of inches). In addition, when setting up scaling for temperature and RH sensors, make sure the names entered in this field are “temperature” and “RH” if you also want to view measurements for the dew point calculated channel. If you enter other names in these fields, the dew point channel will not be available. Use the Label field for custom sensor names instead of the Scaled Measurement Type field. See Scaling Sensor Data for details on changing scaling.

  1. Click Save. The new channel is added to the list of calculated channels in all your dashboards. It will take several minutes before the channel is available to add to widgets, alarms, etc.

Note: The serial number associated with the calculated channel is based on the sensor used for the channel. A number is appended to the end of the serial number of the first measurement channel selected when creating the new channel. You can view this serial number on the device overview page (click Devices >RX Devices > your station name > Overview). Under the latest conditions on the overview page, use the icon for the calculated channel if you want to change its position in the list.

To edit a calculated channel in dashboards:

  1. Click Dashboards and either click Create New Dashboard or click for an existing dashboard. Or, if you are currently viewing a dashboard, click and select Edit Dashboard.
  2. Under Calculated Channels, click for the channel you want to edit.
  3. Make any changes to the name and click Save. If you need to change any other settings, create a new channel instead.

To delete a calculated channel in dashboards:

  1. Click Dashboards and either click Create New Dashboard or click for an existing dashboard. Or, if you are currently viewing a dashboard, click and select Edit Dashboard.
  2. Under Calculated Channels, click for the channel you want to delete.