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>His explanation was that he had someone else do the fills. The new person >did not wait long enough between the time the tank was filled to do the oxygen >measuring. He says that the additional time is needed so the oxygen can mix. >Has anyone ever heard of such a thing? This has nothing to do with it. You don't analyze a mix to tell you what it is - you analyze it as a double-check to confirm that it came out as intended. If the mix is off, then it's because the mixing was done wrong, not the analysis. Whoever is doing the mixing there doesn't know what the hell they are doing, and you are right not to trust them anymore. But weren't you analyzing your mixes before diving all along?? The question of how long it takes the mix to completely homogenize is still subject to some debate, but it really has nothing to do with the situation you are describing - any error it caused would have shown up immediately after mixing, not much later when you saw it (unless of course the guy was analyzing instantly upon mixing, then wasting hours fiddling with the mix to try and "correct" it, in which case the guy is an even bigger idiot. 5% is a hell of an error. It boggles the mind how anyone could get that far off. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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