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Thread: Dug the AC2 out of the archives...couple issues

  1. #1
    Regular Vistor
    Join Date
    May 2015
    Location
    chicago
    Posts
    23

    Dug the AC2 out of the archives...couple issues

    I dug out my tried and true AC2 with DC8 out of storage...I'm really just using it to control some lights and pumps (for feed mode) and it works great.

    I decided to try and hook up the pH and Temp probes but the ones I had were obviously ancient.
    I bought a lab grade pH probe from BRS with a BNC connector on it. I bought a temp probe from Puratek (apparently Neptune doesn't manufacture a 2.5mm connector temp probe any longer)...It was the only place I could find a 2.5mm temp probe.

    I tried to calibrate the pH probe (fresh high and low solutions) twice now and it's reading generally very low (7.8, 7.9) on a well oxygenated and 10 dKH alk tank so I really do not believe that number.

    The larger problem is the temp probe. I calibrated it as well in a glass of ice chips and water...It's currently telling me my tank temp is 48.9 degrees.

    Is there any hope to bringing Frankenstein back to life?
    Any suggestions?

  2. #2
    New User
    Join Date
    Mar 2017
    Location
    Orange County Ca
    Posts
    10
    Your ph could be that low. Are you using 7 and 10 calibration fluids? What does the probe read in the calibration fluids after calibration?
    Have you tried your old tempature probe? I don’t believe it really matters if it has not been used for a long time.

    i have been using the original temp probes on 4 controllers for years including 2 AC2s and they are still accurate.

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