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Thread: Using dKH reference fluid 7.5 best practice

  1. #1
    Join Date
    03.02.2011
    Posts
    42

    Default Using dKH reference fluid 7.5 best practice

    I wonder what everyone's thoughts on using this reference solution as to "best practice". I cant find a specific instruction about avoiding contamination of reference bottle solution with older sample water already in the uptake tubing and white filter and also the other way round of leaving reference fluid in the filter as it is never fully cleared at the end of test!

    Firstly is the reference fluid harmless to the tank?

    presumably best way of avoiding cross contamination is to remove the filter and subtract 7m from tube volume! and dip the sample tube into a container with more than the "sample volume" say 30 ml? what do you do?

    or do people just put the sample tube directly into the reference fluid?

  2. #2
    Join Date
    27.05.2015
    Posts
    2,488

    Default

    1. Empty measurement cell a couple times to remove remaining water inside device
    2. Flush KHD using reference fluid, do the test with the fluid
    3. Empty measurement cell to remove remaining fluid inside device

    The filter won't make a significant difference because it's main purpose is to remove solids to ensure a clean sample is used for testing.

  3. #3
    Join Date
    03.02.2011
    Posts
    42

    Default

    Thanks Vinny

  4. #4
    Join Date
    18.11.2017
    Posts
    67

    Default

    Kann das bitte mal jemand auf deutsch übersetzen? Verstehe leider nur die hälfte.
    Habe mich schon oft gefragt wie das mit der Referenz Flüssigkeit gehen soll.

    Danke und Gruss
    Mirco

  5. #5
    Join Date
    09.11.2017
    Posts
    1,476

    Default

    Quote Originally Posted by Vinny View Post
    1. Empty measurement cell a couple times to remove remaining water inside device
    2. Flush KHD using reference fluid, do the test with the fluid
    3. Empty measurement cell to remove remaining fluid inside device

    The filter won't make a significant difference because it's main purpose is to remove solids to ensure a clean sample is used for testing.
    1. Messzelle einige Male leeren, um Restwasser im Gerät zu entfernen
    2. KHD mit der Referenzflüssigkeit spülen, den Test mit der Flüssigkeit durchführen
    3. Messzelle leeren, um Flüssigkeitsreste im Gerät zu entfernen

    Der Filter macht keinen signifikanten Unterschied, da sein Hauptzweck darin besteht Feststoffe zu entfernen um sicherzustellen, dass sauberes Probewasser für den Test verwendet wird.
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