Toro Sentinel User Manual download pdf (Page 28)

V. ZONE / ET DATA MENU

• Plant Factor

• Application Rate

• Default ET

• Maximum ET

• Program ET Toggle

• Station Type

• Map Station

Note: The controller is capable of running irrigation programs based on ET

(evapotranspiration). When the ET functions are activated, the controller automatically

adjusts program run times according to the ET data. A weather station or ET gauge

needs to be connected to the sensor input terminals of the controller or at the central to

provide ET data.

Plant Factor:

This menu item enables you to assign a percentage factor to any zone for the type of plant

material that the zone is irrigating. For instance, you may assign a bluegrass turf zone a

factor of 100% and a ground cover zone that needs less water a 50% factor. Use the Up

and Down arrow keys to get to the station desired. Use the Right arrow to place the

cursor under the percentage field and edit as desired. Press ENTER to save.

Application Rate:

This is the amount of water a zone applies in inches per hour. For example, a zone of

fixed spray heads may apply the water at the rate of 2" per hour while a rotary sprinkler

zone may apply water at the rate of 0.50" per hour.

You can determine a zone's application rate by multiplying its gallons per minute by 96.3

and dividing that figure by the square feet covered by the zone. To enter the application

rate, use the Up and Down arrow keys to get to the station desired.

Use the Right arrow key to move the cursor under the application rate field and edit the

data. Press ENTER to save.

Default ET

This is the minimum ET figure (in inches) that is used as the default ET regardless of the

weather conditions or if data is missing from the ET gauge or weather station. ET can

vary depending on the time of the season and weather. Generally, daily ET can be from

0.00" to 0.50". Use the Up or Down arrows to toggle the value up or down. Press ENTER

to save.

Maximum ET

Set this to the maximum ET value that can be accumulated between watering days. This

value is the maximum value that a program will ever replace in a single day. Typically

choose a value that is your maximum daily ET multiplied by the number of days between

watering.

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Toro Sentinel User Manual Page 28