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John, > You state that a flow regulator is required for accurate analysis. I have > to disagree, and even can make a case that use of a flow regulator during > analysis can contribute to inaccuracy. > I agree with the rest of your post, too. They do measure partial pressure, thats another (unlisted) reason why I don't think too much of most of the calibration procedures I've seen. However, if you calibrate w/ 100% O2 (which is a common practice, too) then you want it to come through a flow reg device, which reduces the flow to the same level across the sensor. This was my meaning, you want the SAME pressure across the sensor, I was assuming people use a flow device always when calibrating their miniox. If you have a tank sittin around, its not onerous to run 4lpm air across your sensor, then run 4lpm nitrox. That will get you as close as you can w/ air, or O2, which is still not accurate enough to suit me. Good clarification! -- /***************************************************************************/ /* William E. Sadler | email: sadler_b@bs*.bs*.bl*.co* */ /* | batchmo@cr*.co* */ /* Divers Down! [\] | CI$: 71005,1241 */ /* | POTS: (404) 332-2314 */ /***************************************************************************/ /* Keep your Honor, be Bold, and remember: */ /* The only things in the middle of the road are yellow stripes and */ /* squished possums. */ /***************************************************************************/
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