Meaning of this table

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Tomas

July 08, 2018 13:38

Hi guys,

I just set up my loan irrigation system with the Rainmachine Mini 8 and I wonder what the percentage values in the table on my uploaded picture mean.

Can anyone
explain it to me?

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  RainMachine Nicholas July 10, 2018 07:39

  Hi Tomas,

  The percentages show how much from the duration of the program it will actually run considering weather. So if your program zones total duration was 120 seconds, when the bar is 90% it means that it will run 108 seconds.

  The duration for zones in a program are set for a typical summer day (which is computed in advance by us using 30 years of weather data) this can decrease or increase depending on how the current weather compares to our averaging.

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  Tomas July 10, 2018 08:16

  Hi Nicholas,
  And can it happen that the computer will extend the duration of my preset because the weather is too hot or too dry? Or does it only the reduction if there was some rain in the meanwhile?

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  RainMachine Nicholas July 10, 2018 08:47

  The reduction is not only from rain, but from all weather properties like min-max delta, wind, humidity, dew point, pressure. It can also increase (over 100%) if there is a really dry and high delta from min/max temperatures (desert like weather). How much you allow to go over 100% can be set from Settings > Restrictions > Hot Days but this isn't usually required.

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  Tomas July 10, 2018 18:03 (Edited July 10, 2018 18:04)

  
  OK, thanks for the explanation.

  Since I have added the german weather forecast as a custom service file, my EvapoTranspiration exploded to 150-280. Can this be realistic?

  The RM wants to extend my program up to 150% as I allowed it for hot days.

  But for me it looks like there is some miscalculation with the new data?!

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  RainMachine Nicholas July 10, 2018 18:12

  No, it can't be realistic, it's a conversion/parsing issue, we haven't yet added DWD parser to our testing releases. You should also inform the author about this issue. 

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  Tomas July 11, 2018 09:26

  Ok thank you very much

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  Sebastian July 11, 2018 20:02

  Hi Thomas, 

  Hi Nicholas, 

   

  I found the problem in the parser and will provide an updated version later. 

  @Nicholas: What exactly is the interpretation of the ET0 value? Is this the actual evapotranspiration or the potential evapotranspiration (ETp). 

  DWD provides the latter. I guess it does not make any sense to include this value in the parser.

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