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Thread: Ph Calibration 4.00 and 7.00

  1. #1
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    Ph Calibration 4.00 and 7.00

    Hi.. someone know why when i calibrate my PH probe , my Apex ask a 4.00 solution and 7.00 solution ?

    Why 4.00 and why not 10 ?

    In salt water... 4.00 is not important ?

    thanks

    sorry for my english.. i speak french...

  2. #2
    Master Control Freak RussM's Avatar
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    Use 7 & 10 fluids for calibration when the pH probe will be used for normal use in saltwater, where the pH is above 7.

    Use 4 & 7 when the pH probe will be used to measure the pH in a calcium reactor, where the pH is usually below 7.
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  3. #3
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    I know ... but with my Apex , i have only the 4.00 and 7.00 option calibration ?

    thanks

  4. #4
    Frequent Contributor zombie's Avatar
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    If you only have 4.01 packet, it will be somewhat inaccurate but it can work in a pinch to get it in the rough ballpark.

    If you mean your apex only has the option for 4 and 7, you are doing something wrong. Select 7.01 for the first step and 10.01 for the second.

    Sent from my SM-G965U using Tapatalk

  5. #5
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    Don't have a 10.01 option with my Apex controller new gen....

  6. #6
    Frequent Contributor zombie's Avatar
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    You select 7...

    Sent from my SM-G965U using Tapatalk

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