Hello!
I have a problem when i run this it appears "The operation >= cannont accept the arguments"
Anyone can help me?
That is not the full error message. Can you post the full error message.
The operation >= cannot accept the arguments: ,[" ppm:2234.48"] , [3000]
The error contains a whole explanation. You are trying to compare a number with a text. You have to get rid of the text "ppm:" first so that only the number remains, and then compare them.
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The issue here is that you are trying to compare a string and a number (which is not a problem if the string only contains numbers). So to sort out we remove the text " ppm:" from the string and then compare it.
Just replace the get ppm in the comparison block with the blocks below.
In the comparison block, Replace
With
Hope it helps 
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