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Thread: CO Analyzer

  1. #1
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    Default CO Analyzer

    I recently purchased the oxycheq CO analyzer, but I don't think it's working. There is no owner's manual or any instructions other than what's on the web site which doesn't say much. flow restricter not needed?

    It reads 001 when I turn it on (sometimes bouncing down to 000). The website says it reads in ppm, 1-100. correct? When I blow into it, nothing changes, still 001. When I put it up to my exhaust pipe with car running, it reaches 004, 005, 004, which is actually about right for a most-excellent catalytic converter, but my truck is 7 years old.

    I don't know a smoker, my wife used to smoke but she quit the first of the year (just when I could use a smoker at home). And according to several websites car exhaust is like 10,000 times more co than a smoker's exhaled breath. 0.1 to 0.2 ppm in air (accounting for the 000 to 001 flucuation I see?).

    Is the unit faulty? Any suggestions on how to test the accuracy? Oh, I've looked for calibration gasses, but dang, they are expensive!

    Maybe dive shops could save a bad tank of air when a customer finds one and save it for the rest of us to use as calibration gas!

    Concentration Source
    0.1 ppmv Natural atmosphere level (MOPITT)[32]
    0.5 to 5 ppmv Average level in homes[33]
    5 to 15 ppmv Near-properly adjusted gas stoves in homes, modern vehicle exhaust emissions[34]
    17 ppmv Atmosphere of Venus1
    00 to 200 ppmv Exhaust from automobiles in the Mexico City central area[35]
    700 ppmv Atmosphere of Mars
    5,000 ppmv Exhaust from a home wood fire[36]
    7,000 ppmv Undiluted warm car exhaust without a catalytic converter[34]

    thanks,

    skip

    Last edited by skip; 03-31-2012 at 05:15 PM. Reason: organize table
    "Learning the techniques of others does not interfere with the discovery of techniques of one's own." B.F. Skinner, 1970.

  2. #2

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    I use bottles of calibration gas to check my co analyzer every so often.

    Did you see any critters in that cave? StygoBites.com

  3. #3
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    Default

    where did you buy it? how much was it?

    thanks,
    skip

    "Learning the techniques of others does not interfere with the discovery of techniques of one's own." B.F. Skinner, 1970.

  4. #4
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    Default

    I just order one from Dive Right In Scuba and it cost 25.00.

    http://www.diverightinscuba.com/cata...st-p-3227.html


  5. #5
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    Default

    Great thanks. I've done business with them several times, can't believe I didn't see it.

    skip

    "Learning the techniques of others does not interfere with the discovery of techniques of one's own." B.F. Skinner, 1970.

  6. #6

    Default

    Quote Originally Posted by mdax View Post
    I use bottles of calibration gas to check my co analyzer every so often.
    Note that although this may serve skip's purpose, this is a can of "bump" gas (which is meant to test for analyzer response not accuracy), it is not calibration gas.


  7. #7
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    Default

    Quote Originally Posted by Angry Turtle View Post
    Note that although this may serve skip's purpose, this is a can of "bump" gas (which is meant to test for analyzer response not accuracy), it is not calibration gas.
    According to my analyzer's instructions, and the bump gas itself, the can IS at 10ppm, and the Analyzer should read between 8 and 13.


  8. #8

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    Quote Originally Posted by Jax View Post
    According to my analyzer's instructions, and the bump gas itself, the can IS at 10ppm, and the Analyzer should read between 8 and 13.
    Which should confirm that the analyzer is working, but not serve to calibrate the sensor.


  9. #9
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    Default

    Well, the bump gas *does* say "not for calibration". I figured it was some liability thing.


  10. #10
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    Default

    Well, I am very unhappy now!

    I thought I would check my analyzer. Started it, zeroed it, ran the bump gas . . . IT RAN OUT!


    I only used it a couple of times. . . It either leaks, or it isn't very pressurized! :furious:



    Based on this, I do not recommend "Bump It" by GasCo!



 

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