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ScottBonis@ao*.co* wrote: > >Chris Elmore has mentioned that it is the partial pressure of oxygen that the >sensor is responding to. And we know from Dalton's law that the PP(O2) is >equal to the fraction of oxygen in a gas multiplied by the total pressure of >the gas. So if the gas pressure at the sensor is above ambient and ambient >was the pressure at which the sensor was calibrated, the sensor will measure >a higher partial pressure of oxygen and will therefore display an >artificially high fraction of oxygen for the gas under analysis. A very nice explanation for why I feel that it's important to know that you are measuring the same flow between calibration and measurement. However, flow rate doesn't exactly translate into PP. Some people seem to be saying that it's not that big of a deal, and that the measurement is still pretty close. I guess I should test this out for myself. I know from experience that dropping the PP (by sucking on the intake of the analyzer) will result in vastly different readings. This is what has prompted me to worry about the whole issue in the first place. Cheers. -- Paul Braunbehrens mailto:Bakalite@ba*.co* http://www.daw-mac.com Mailing list for digital audio on the mac -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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