The forum discussion centers on the calibration of a venturi tube designed for a digital peak flowmeter, with a noted error of 12.3% between theoretical (610 L/min) and experimental (535 L/min) flow rates. Participants discuss the influence of fluid type on calibration accuracy and reference a study comparing various portable peak flow meters, highlighting percent errors for devices such as Air Zone® (5.1%) and Assess® (1.9%). The conversation emphasizes the need for accurate calibration methods without relying on measured flowrate devices.
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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®."