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Approximate calibration

  1. Oct 24, 2016 #1
    I've designed a venturi tube for my thesis ( Design of a digital peak flowmeter). I was wondering if there was a way to calibrate the flowrate, without using a measured flowrate producing device. The current error is about 12.3%. Theoretical 610L/min vs experimental 535L/min.
     
  2. jcsd
  3. Oct 24, 2016 #2

    Nidum

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    Bucket
     
  4. Oct 24, 2016 #3

    CWatters

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    Big bucket.
     
  5. Oct 24, 2016 #4
    But it's airflow, wouldnt the nature of the fluid ( being water or any other liquid) impact calibration?
     
  6. Oct 24, 2016 #5
    Forgot to add, that it's used to check asthma parameters
     
  7. Oct 24, 2016 #6

    CWatters

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    What did you use to calculate the current error rate?
     
  8. Oct 24, 2016 #7
  9. Oct 24, 2016 #8

    CWatters

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    So you compared the flow rate recorded by your new digital peak flowmeter with the flow rate measured by another device and recorded on a chart?

    How do you know which is more accurate?

    Google found..

    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2882540/

    "Comparison of five portable peak flow meters"

    From the Results..

    "The percent error for the spirometric values for each meter was 5.1% for Air Zone®, 1.9% for Assess®, 11.2% for Galemed®, 6.5% for Personal Best® and 3.0% for Vitalograph®."
     
  10. Oct 24, 2016 #9
    Then how do I calibrate my results? Thanks
     
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