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Watering times

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    RainMachine Nicholas

    The watering times that you set for a program, are for a normal summer day (usually August in northern hemisphere). Both custom and suggested are related to summer day. 

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    Davekstl

    Ok....I am new to your system, thus all of the questions. I spend a great deal of money and water taking care of an acre, that is why I want to move from the existing system to your HD-12,  I am watching the HD-12, but it is not hooked up to the valves.

    So in the zipcode for St Louis 63131, July\August is the 100% normal day.  So I set my Zone 1 at 20 minutes. That was the July Auguts 100% mark. But watering on May 14 was 104% temp was 86, May 15th watering 111%, temp was 90, May 16th watering 110% temp 90

    Shouldn't the watering be no higher than 100%, not higher?

    I am not sure if I am setting the initial watering times correctly.

     

    May 56.6F 76.5F
    Jun 65.9F 85.3F
    Jul 70.6F 89.8F
    Aug 68.6F 87.9F

     

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    RainMachine Nicholas

    Hi,

    Our "summer" base values are calculated over a interval of 30 years moving averages. If you go to Web UI Setting > Weather > Weather Services Comparison , click on ET tab

    and you should see 2 lines (one blue and one red). The blue one is our "summer" evapo-transpiration reference value. Check how close the red line (your current computed evapo-transpiration) is to the blue line (or above). 

    Also for evapo-transpiratio not only MAX temperature matters. A big impact is the difference between MAX and MIN, relative humidity and wind.

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    Davekstl

    I am posting this graph for training purposes (me), maybe you can explain.  Also based on your response there will be times that the watering will exceed the July\August settings.

    Thanks - Dave

     

     

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    RainMachine Nicholas

    Yes, if the evapo-transpiration calculations will exceed the average ET for a normal summer day in your region. 

    In that graph you can see how the red line goes over the blue line resulting in more than 100% irrigation. In other days there is less than summer irrigation.

     

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    Davekstl

    It makes sense, thanks

    Dave

    Now just give me a way to change the spray\rotor head arc in the zone setting, and I will be a happy camper :-)

     

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