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Working pressure is the operating pressure of the cylinder. This is important in that it is used to calculate how many CF or CM of gas exists per PSI/BAR.
As an example:
77.4cf tank with a working pressure of 3300psi can be represented as about 42psi/cf. When the software attempts to calculate your SAC rate, it first needs to calculate how much gas is available per pressure unit (psi/bar) in your tank.
Another example - two divers use Oceanic computers. One has a LP steel tank overfilled to 3200 PSI. The other has a HP steel tank filled to 3200 psi. If the rated tank sizes are the same (say, 100CF), the diver with an overfilled tank has significantly more gas per PSI than the diver with an HP tank. Without knowing the operating pressure of the tank it is impossible to accurately compute a SAC rate, as the OceanLog software cannot possible know that one fellow has a high pressure tank (and at 3200psi has less than the rated tank capacity) while the other bloke has a low pressure tank that is quite full of gas, beyond the official rated capacity of his tank.
What you say above would be correct if the fisical size of the tanks were diferent, there WP (water capasity).
I think the light dawns
.
Ok, i have a 12L cylinder (Water Capasity) with a Working Pressure of 232 BAR.
So, 12 x 232 = 2784 (the volume of air it would relese at the surface).
So where it says Working Pressure I stick 232
and where it says Cylinder size I stick 2784 NOT 12
close the program and start it back up.
Getting hole numbers now, Checked a few and they seem correct using the average depth.
Ok I have a few questions for OCEANIC.
Which is esyer to remember:
2320L@232BAR, 3100L@310BAR, 2784L@232BAR, 3720L@310Bar, 4845L@323Bar.
or
10L, 12L, 15L.
eg.
hey buddy, what you diving with?
A. I am diving with a 2784L@232BAR.
or
A. I'm sticking a 12 on.
Which is easyer:
start oceanic log and type every thing in manualy
or
start oceanic log and plug dive computer in and down load the data.
eg.
you dont need working pressure if you use WC (water capasity), the computer will do the rest.
Oh another clitch I found CUT and PASTE dose not work, (well in the cylinder size box any way).