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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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>
>
John:
I repeat, this is BETA CODE, still in testing, and not yet verified!!
It doesn't work reliably yet.
Now, having said that, I will run the numbers again, looking for an overfill
that cools to 3000psi.
Pumping Data, fill your cylinder in this sequence to these pressures.
Press Press Temp
(atm) (psi) ('C)
O2 74 1087.9 33.7
AIR 240.0 3533.3 71.5
After cooling back to 20' C,
pressure should fall to 204.4atm, 3005.0psi.
Christopher M. Parrett, President, Abysmal Diving Inc.
Makers of ABYSS, Advanced Dive Planning Software.
6595 Odell Place, Suite G. Boulder CO, 80301
Ph, 303-530-7248, Fx, 303-530-2808
ftp://abysmal.com/users/abysmal http://www.emi.net/gulfstream/abyss/abyss.html
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