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> The big sources of mixing errors are likely: > = > 1)RULE NUMBER ONE > 2)Temperature control > 3)bad O2 analysis (re #1) > 4)Compressability for ppHe>500psi, ppO2 & ppN2 > 4000psi. > = > Regards, em > = > Eric, it all really comes down to rule number one, but > they don't believe it. - G > -- I think that the people are here confused (=3Ddon't belive) because we a= ll have heard about gases that are heavy and go to the bottom of the available space in air. For example, if the liquid gas tank in a boat leakes, the boat will be filling with that gas beginning from down to up= pushing air out. The gas must be carried away with buckets, which looks very stupid ! Figure firemen carrying gas in (empty looking) buckets :) And this is true, the gas is so heavy and goes under the air. This is misunderstood so that all gases behave like this. Reason for this kind of behavior is that those gases are organic (which means often big and heavy molecules). In diving, the breathable gases are small and light, so the thermal energy is enough to mix them very quickly, the gravity don't have a ghance to win this competition. We cannot breath big orcanic molecules because of too much of breathing resistance for our lungs. Terho physicist
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