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Thread: Salinity climbing

  1. #1
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    Salinity climbing

    Hi Community,

    A couple of weeks ago I started getting alarms on my salinity probe (Apex connected Dec 2017). Prior to that time I had no problems with it.

    When it started alarming (high) I recalibrated it, thinking it was about time anyway. I also added the temp conversion (2.2), which I hadn't previously enabled.

    Since then it seems to calibrate ok, then over the next couple days will slowly but steadily climb until it's reading too high. (Water level and SG check out fine using a refractometer and yes it's calibrated). I've tried several times. I've also unplugged and rerouted the wires, tested tank water in a cup outside the tank to look for stray voltage (no change) and moved the probes. And turned every piece of equipment off, one by one (no change then either).

    It's still happening. I've read of others with this issue but can't find anyone who actually solved it.

    Here's a graph. The spikes and drops were the times I either recalibrated, moved, played with wiring etc. The most recent attempt was unplugging and rerouting all of the wires. It climbed more slowly but still climbed.

    In some areas I can see where the temp and salinity correlate, not so much in others.

    Screenshot (6).jpg



    If anyone has solved this issue please lend a hand. I am beyond frustrated.

    Thanks,

    Cindy
    Attached Images Attached Images

  2. #2
    Frequent Contributor zombie's Avatar
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    Did you make sure to float the calibration packet for 30 minutes to equalize temp to match the tank?

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
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    Yes. Prior to posting I scoured this forum and R2R for answers. Took all that great advice already

    Sent from my SM-G935T using Tapatalk

  4. #4
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