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>Posted on 1 Nov 1995 at 17:01:14 by Christopher M. Parrett

>>If I as a diver wants a mix of say 50% O2 and 50% N2 in a 80 cu feet
>>tank and a final pressure of 3000 psi (20'C) could I use your program
>>to "do" this ?

>Pumping Data, fill your cylinder in this sequence to these pressures.
>        Press   Press   Temp    Temp
>        (atm)   (psi)   ('C)    ('F)
>O2      64.9    935.5   32.3    90.1
>AIR     205.0   3014.0  66.1    150.9
>After cooling back to 20' C,
>pressure should fall to 177.2atm, 2604.2psi.

Your program failed my 3000 psi @ 20'C criteria.
I've lost 400 psi and have only 2100 psi available
for breathing.  That's a loss of almost 20% in gas.

I repeat, how can I use your program to get
50/50 mixes and have the gauge read 3000 psi or
close at the beginning of a dive in 20'C water ?

john

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