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Thread: 2 Questions

  1. #1
    Join Date
    08.11.2016
    Posts
    15

    Default 2 Questions

    Just purchased a P4, no issues so far but I am trying to understand how to program outlets to turn on and off based on values of a probe.

    First Question:

    What I am trying to Achieve on an outlet is when the PH is above 6.75 the outlet needs to be on, and stay on till if falls below 6.65 or .10. (This is for a Calcium Reactor)

    Would Nominal would be actually 6.65 with a HYSTERESIS of .10. ?

    I would set the socket to be decreasing. What confused me in the manual was the example, it uses 7.0 nominal value and a HYSTERESIS of .4 and it states if down it would be The down-regulation-socket switches on at 7.2 and off again at 7.0. What I am not understanding was is it not off again at 6.8 (.4 Hysteresis) or is that because it fell below the Nominal Value it turns off at 7.0 ill regardless of the HYSTERESIS value.

    Second Question:

    3- How do you set a negative ORP value for a ORP probe since it going into a Sulfur Denitrification system.

    Thank you

  2. #2
    Join Date
    27.05.2015
    Posts
    2,488

    Default

    This is being handled via email.

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