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  1. #11
    Join Date
    Oct 2009
    Location
    KARACHI PAKISTAN
    Posts
    394

    Quote Originally Posted by turbotom1052 View Post
    luke i think a conductivity meter that reads up to 2000 ppm is fine. if your reading off the scale on a 2000 ppm meter then its time to replenish your fountain solution anyways
    ppm is the measuring unit for water hardness,[Parts per million (ppm)
    Usually defined as one milligram of calcium carbonate (CaCO3) per litre of water].....
    correct me if I am wrong.

  2. #12
    Join Date
    Oct 2008
    Location
    retired to panama
    Posts
    400

    i stand corrected

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  4. #13
    Join Date
    May 2011
    Location
    California
    Posts
    6

    Conductivity to TDS comversion

    Quote Originally Posted by aqazi81 View Post
    ppm is the measuring unit for water hardness,[Parts per million (ppm)
    Usually defined as one milligram of calcium carbonate (CaCO3) per litre of water].....
    correct me if I am wrong.
    Just to clarify for anyone that may be digging around through old posts looking for information...

    PPM stands for parts per million and is a unit of measure for Total Dissolved Solids (TDS). This applies to many application, not just water hardness.

    Micromhos or Microsiemens is a unit of measure for Conductivity.

    The relationship between conductivity and TDS is non-linear and no single multiplier can be used to convert between the two. TDS is dependent on the type of mineral and does not only refer to calcium carbonate.

    You can take a look at this article to see what I mean: Conductivity to TDS conversion

    Different minerals have a different conductance value.

    Again, just to clarify...

    Hope that helps,
    Jim Rutan
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