The discussion centers around the calibration of a venturi tube designed for a digital peak flowmeter, specifically addressing the challenge of calibrating flowrate without a measured flowrate producing device. Participants explore the discrepancies between theoretical and experimental flow rates, as well as the implications of using different fluids for calibration.
Participants express uncertainty regarding the calibration process and the accuracy of different measurement devices. Multiple competing views on the impact of fluid type and calibration methods remain unresolved.
Limitations include the lack of clarity on the specific calibration methods available and the dependence on the accuracy of the comparison device used for measuring flow rates.
This discussion may be useful for students and researchers working on fluid dynamics, calibration techniques, or those involved in the design of medical devices related to respiratory health.
CadisEtramaDiRaizel said:Theoretical 610L/min vs experimental 535L/min.
But it's airflow, wouldn't the nature of the fluid ( being water or any other liquid) impact calibration?CWatters said:Big bucket.
Forgot to add, that it's used to check asthma parametersCadisEtramaDiRaizel said: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.
A chart.CWatters said:What did you use to calculate the current error rate?
Then how do I calibrate my results? ThanksCWatters said: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®."