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Thread: CC test in TF-100

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    Join Date
    May 2013
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    Lafayette, LA
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    CC test in TF-100

    I tried searching for this answer but couldn't find anything. When doing the FAS-DPD test with the TF-100, I've seen the official (and extended) instructions say to add the reagent R-0871 until the sample turns clear. I've seen for the other tests that it's recommended to add until there is no color change. I've seen some people say they do that as well for the FAS-DPD test, which I started doing. I was wondering though if this will affect the results of the CC test since after adding R-0003, you add the same reagent (R-0871) as the FC test. In other words, if it turns clear, and I add another drop to make sure there's no further color change, I've added an addition drop of R-0871 to the mixture than if I had just stopped when I thought it was clear. Will this additional drop affect the CC reading?
    Discovery LX, 17K gallon, vinyl, round (27'x4'), AG, sand filter, 1 speed 1.5HP, installed May 2012
    TF-100 + SpeedStir + SampleSizer = :-)

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    Administrator Leebo's Avatar
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    Jul 2011
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    Re: CC test in TF-100

    It will not affect the CC test, just use more reagent. This video shows the test in detail......


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    Join Date
    May 2013
    Location
    Lafayette, LA
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    16

    Re: CC test in TF-100

    I had forgotten about those videos. Do you know why it doesn't matter? I would naturally think that the more R-0871 you add at the end, the more it would affect the CC test since it's the same reagent to turn it back to clear. Is it not so obvious chemistry-wise or is this part of the margin of error?
    Discovery LX, 17K gallon, vinyl, round (27'x4'), AG, sand filter, 1 speed 1.5HP, installed May 2012
    TF-100 + SpeedStir + SampleSizer = :-)

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