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Thread: Drying Salinity Probe before calibration

  1. #1
    Regular Vistor
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    Drying Salinity Probe before calibration

    How is everyone drying the probe quickly before calibrating the probe?

    I have shaken out the water as best as I can.

  2. #2
    Frequent Contributor iamchadster's Avatar
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    That's usually good enough. I've taken some of the canned air and blown it off to remove any crud lodged inside the housing of the probe, but usually just a couple good shakes is fine.
    Chad

  3. #3
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    Cool , Thanks

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    121.PNGCompared to my calibrated hand held its off by 2 .. My hand held reads 34. Also I have temp comp on 2.2 If I remove temp comp it reads 34 which is closer to my refractor.correct.PNG

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    Frequent Contributor zombie's Avatar
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    I use a paper towel to soak up the excess water after I give it a light shake. The drying step takes literally two minutes if you use a paper towel.

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

  6. #6
    Frequent Visitor rkpetersen's Avatar
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    It should be dry but need not be bone dry; how you do so is less important. I would leave temperature compensation turned off and do the calibration with the sample package temperature equilibrated in the water of your sump near your probe. If you're getting persistent failures at calibration it milght help to disconnect the probe, do a sham manual calibration, reboot the apex, reconnect the probe, and try again.

  7. #7
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by rkpetersen View Post
    I would leave temperature compensation turned off and do the calibration with the sample package temperature equilibrated in the water of your sump near your probe.
    That does not help. If you disable temp compensation and calibrate and the tank was not exactly 77F, then the moment temp compensation is enabled, the result will be skewed. Temp compensation should always be left on if you choose to use it.

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

  8. #8
    Frequent Visitor rkpetersen's Avatar
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    Well, maybe I'll try that out again next time I recal my probes. In the meantime, my probes are reading correctly without it. Possibly because my water temp never varies by more than 1 degree F.

  9. #9
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    Quote Originally Posted by rkpetersen View Post
    Well, maybe I'll try that out again next time I recal my probes. In the meantime, my probes are reading correctly without it. Possibly because my water temp never varies by more than 1 degree F.
    It doesn't skew if it's never enabled, but does skew as temp changes without it at all (enabled compared to disabled).

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

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