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Thread: Why use "Defer" here?

  1. #1
    Regular Vistor
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    Oct 2014
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    Denver, CO, USA
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    44

    Why use "Defer" here?

    Hi -

    I saw this code in another post that was describing setting up a virtual outlet that indicates high pH:

    pH_High
    ----------
    Set OFF
    If pH > 8.4 Then ON
    Defer 000:05 Then ON

    What is the reason for for "Defer" here? I'm guessing it might be to avoid transient changes? Is that something I
    should add to e.g. my various checks for low or high temperature?



    Thanks!
    Larry

  2. #2
    Master Control Freak aquamanic's Avatar
    Join Date
    Jan 2013
    Location
    Baton Rouge, LA
    Posts
    6,181
    That's one use for it and probably the most common use.

    I don't think it will do anything for temp because temp doesn't tend to swing quickly. pH can react to all sorts of things in your tank as can conductivity and ORP. That's why you'll see it used with those probes more than temp.
    Al

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  3. #3
    Regular Vistor
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    Oct 2014
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    Denver, CO, USA
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    Cool, that makes sense - thanks for the info!

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