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> From: "JOHN BRADY" <bradyj@su*.ne*> > Subject: PSI/O2% Chart > Date: Sat, 18 Apr 1998 15:40:23 -0400 > > Does anyone out their have a PSI/O2% Chart for doing backyard nitrox fills. > > Any info would be appreciated. Here is an equation describing how much "extra" O2 you need when topping with air to blend a given FO2 at a given final pressure: deltaP = ((FO2 - .21) / .79) * finalP However, in all seriousness, if you don't feel comfortable deriving these tables or equations yourself (you need to know the ideal gas laws and some basic algebra), please think twice about blending (or even diving) nitrox. If any of this seems "hard" or "mysterious", it should warn you that there are some important gaps you need to fill in before taking this on. - Todd -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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