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Thread: Tunze Ato

  1. #1
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    Tunze Ato

    Will this code work for my ATO for turning off when salt is below 35 and when the ATO water is low. I have an OS in the air water tank connected to the FMM.Screenshot_2018-03-12-13-35-54.jpg

  2. #2
    Frequent Contributor zombie's Avatar
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    Technically yes, but it is missing some important failsafes. I would add these three lines as well.

    Defer 000:04 Then OFF
    When On > 005:00 Then OFF
    Min Time 060:00 Then OFF


    This does some filtering so it is sure that the optical is actually covered and not just a quick wave or splash, limits the runtime to 5 minutes, and prevents it from short cycling by making sure at least an hour has passed since the last top off. Make sure you enable logging on the outlet and look over how long the fill times were over a couple days. The When timing should ideally be 2 times the longest run in that test period for the best compromise between reliability and security.

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
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    Below is the new program however the ATO switch on dashboard goes from AUTO to OFF BUT doesn't go back to AutoScreenshot_2018-03-15-09-33-45.jpg

  4. #4
    Frequent Contributor zombie's Avatar
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    The AUTO to OFF means it ran longer than 5 minutes. Try it a few times if it won't stick back to AUTO. Sometimes a poor connection will "undo" your last command.

    You might be an engineer if...You have no life and can prove it mathematically.

  5. #5
    Master Control Freak RussM's Avatar
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    Zombie - note that this is a Tunze ATO, not a Neptune ATK.

    SCSurfzone - I’d use this:

    Fallback OFF
    Set ON
    If ResLow OPEN Then OFF
    If Salt < 35.0 Then OFF

    I did not include SW1 and SW2 because you did not mention them in your post.

    I’d also reduce the value in the If Salt statement - it’s kinda high to be used to disable ATO, unless you typically run your tank slightly hypersaline
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  6. #6
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by RussM View Post
    Zombie - note that this is a Tunze ATO, not a Neptune ATK.
    It appeared he disassembled and is just using the pump since his original code had switch statements in them, but that very well could have been an incorrect assumption.

    You might be an engineer if...You have no life and can prove it mathematically.

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