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> Well, I was a Doubter, too, until I actually *saw* it happen. 

[...]

> Mini-Ox, and sure enough, the FO2 had gone up by a few percentage
> points. After a few more minutes of rolling, the FO2 had risen to
> what my "target" was, after which it leveled off (note that I did not
> adjust the calibration on the Mini-Ox at any point).

O.K....maybe I *would* worry about it for nitrox as well.  I think the
bottom line is to know what you're breathing, so it's important to check
the mix not only after you mix, but just before you get in the water (I
have also had several experiences with differential leakage of helium out of
cylinders).

Aloha,
Rich


Richard Pyle
deepreef@bi*.bi*.ha*.or*
*******************************************************************
"WHATEVER happens to you when you willingly go underwater is
COMPLETELY and ENTIRELY your own responsibility! If you cannot
accept this responsibility, stay out of the water!"
*******************************************************************

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