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Thread: P4 Calibration Problems

  1. #1
    Join Date
    17.07.2012
    Location
    Houston
    Posts
    158

    Default P4 Calibration Problems

    I noticed my Conductivity Probe was not calibrating correctly. It was reading much lower than it should have, compared to two refractometers.
    It was 5 years old so I got a new one in January. The new one is not calibrating either.
    I've tried both GHL and Pinpoint calibration fluid. Just calibrated again and instead of 1.0264, it's reading 1.0246 in the calibration fluid.
    Any idea why this might be?
    It's making me question my other probes, too like pH.
    -dennis

  2. #2
    Join Date
    17.07.2012
    Location
    Houston
    Posts
    158

    Default

    ok, now that I have the probe back in the sump, it's reading what the refractometer read... 1.028
    So seems like the GHL calibration fluid I had was old/bad.
    Still not sure why the fluid read low after calibration.
    -dennis

  3. #3
    Join Date
    18.02.2009
    Location
    Kaiserslautern
    Posts
    7,710

    Default

    maybe different temp. used for compensation during calibration and actual measurement
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