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Thread: Accurate salt test needed.

  1. Back To Top    #1

    Join Date
    May 2012
    Location
    South Florida
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    36

    Accurate salt test needed.

    Jandy was out replacing sensor in new unit. They asked me if the unit was calibrated as they did not bring their calibrator. So, if the unit needs to be calibrated what is the most accurate testing method for home use. Right now the unit reads 3.7g/l or 3700 ppm(mg/l). Aquacheck test strips read 3070ppm.
    IG ~14,000 Gal
    Pentair clean n clear Cartridge 100g/
    SWG Aquapure 1400
    Hayward XL Cleaner
    Premix Marbletite Freestone series
    1.5Hp 2 speed
    TF-100

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Accurate salt test needed.

    The Taylor salt test is the best available for home use, but even that is +-400.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

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    May 2012
    Location
    South Florida
    Posts
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    Re: Accurate salt test needed.

    Thanks. I'll order one right away.
    IG ~14,000 Gal
    Pentair clean n clear Cartridge 100g/
    SWG Aquapure 1400
    Hayward XL Cleaner
    Premix Marbletite Freestone series
    1.5Hp 2 speed
    TF-100

  4. Back To Top    #4

    Join Date
    May 2012
    Location
    South Florida
    Posts
    36

    Re: Accurate salt test needed.

    Received Taylor salt .... Thanks

    Performed the following salt tests 3x

    pH 7.5
    FC 15 (just finished shocking pool)
    CC 0
    TA 70
    CYA 80
    CH 320
    Temp 93

    Aquacheck
    3330
    3330
    3330

    Taylor
    4200
    4200
    4400

    Aqapure sensor reads 3700

    So, what is the real salinity? Jandy was out replacing sensor and did not have calibrator. I told them I would do it myself. Based on the previous tests what would you calibrate to. At 4000 ppm unit ****s off
    IG ~14,000 Gal
    Pentair clean n clear Cartridge 100g/
    SWG Aquapure 1400
    Hayward XL Cleaner
    Premix Marbletite Freestone series
    1.5Hp 2 speed
    TF-100

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Accurate salt test needed.

    I'd leave it alone. The SWG is just as likely to be correct as the Taylor test.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  6. Back To Top    #6

    Join Date
    May 2007
    Location
    Montreal Canada
    Posts
    326

    Re: Accurate salt test needed.

    Why not add 4.00 grams of kosher salt to 1 liter distilled water and use that as a 4,000 ppm NaCl standard solution. Dilute it as needed.

    Also, for the Taylor salt test I find it easier to use a 20 mL sample, 2 drops of R-0630, then titrate. Each drop of titrant is worth 100 ppm NaCl, but the endpoint is easier to reach without going over (which is quite easy to do with this kit, you want salmon color, not brick (brick is the color you get when you mix 1 drop R-0630 and 1 drop R-0718).

    Also, there is the salt content (NaCl) and the conductivity of the solution (which is anything added to the water that increases its ability to conduct electricity). The unit looks at that while the Taylor measures NaCl.

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