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Thread: KH director - Measurements do not meet expectations

  1. #1
    Join Date
    26.06.2018
    Posts
    2

    Default KH director - Measurements do not meet expectations

    Hi,

    I have some trouble when comes to accuracy of KH-director. I discovered that the measuring numbers varies between samples and this does not depends an the actual value of dKH.
    I did recalibrate the dosing pumps and the PH probe and it didn't help, but then I saw Air bubbels in the reagent tube (between dosing pump and KH-director). I vent the tube several time to ged rid of the bubbels and then I got a measurement close to the ecpected value. But the air bubbles kip coming back after few measurments, what should I do?

    PS:
    I had ordered the package below when I purchased the KH-director i.e I use the PVC tube.

    3 x 1l reagent fluid
    70 cm Flex PVC tube

  2. #2
    Join Date
    27.05.2015
    Posts
    2,488

    Default

    What is the distance of the reagent bottle from the KHD unit?

  3. #3
    Join Date
    26.06.2018
    Posts
    2

    Default

    Ca 25cm

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