Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: pH Value assigned to L1 need 0-10v clarification

  1. #11
    Join Date
    10.10.2013
    Posts
    994

    Default

    Hi,

    Set U Min to 0 et U Max to 5
    Increase Hysteresis for higher range.

    For exemple, with U Min set to 0v et U Max set to 5v and pH hysteresis set to 1pH:
    with nominal value = 8.0 and current ph = 9.5 you will get 5v
    with nominal value = 8.0 and current ph = 8.0 you will get 0v
    with nominal value = 8.0 and current ph = 6.5 you will get -5v

    But as 1 is max allowed value for hysteresis we can't get higher range than 1.5pH for 10V (reduced to 5v in your case)

    Gaël

  2. #12
    Join Date
    01.10.2022
    Posts
    7

    Default

    I see how my example could be construed as trying to achieve 0-5v. I've already decided I'm going to use a voltage divider to prevent damage of the arduino. Let's forget about U and U max for a moment. I want 1-9v to provide a pH range from 7.65-8.46. That a scale of 0.1v = 0.01pH.

    Example, when pH = 8.30 the output voltage would read 7.5v. another example, when pH = 8.00 the output voltage would read 4.5v.

    Can this be done with programmable logic? Or any other way?

  3. #13
    Join Date
    10.10.2013
    Posts
    994

    Default

    Hi,
    Sorry, I already told you what can be done.
    Forget programmable logics, they can't do that and can only be applied to switchable channels.

    Gaël

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •