meaning of SAC?

[GreenDiverDown]

If for whatever reason I have a SAC of .5 on a dive, wouldn't it be .5 wheter I used an AL 80 or a steel 100?

Yes. Cuft/min = Cuft/min. Your depth consumtion rate in psi/min will be different when comparing different size cylinders.

 

[diverrick]

MAN!!! My SAC went up just looking at all the math!! I am math phobic anyhow.

 

[joe rock]

Yes. Cuft/min = Cuft/min. Your depth consumtion rate in psi/min will be different when comparing different size cylinders.

Yes it would and I think of SAC as cu.ft./min. which other's refer to as RMV. That's what many of the posts are trying to say. Thanks.

 

[Cave Diver]

Thanks Cave Diver, I do understand that. It seems there are two different things going on in this thread (although I could be missing something). One is the calculation and what you're calculating. The other is what effects consumption rate. No question the size of the tank is critical for the calcuation of either measure, but I don't think the size of a tank effects consumption rate. If for whatever reason I have a SAC of .5 on a dive, wouldn't it be .5 wheter I used an AL 80 or a steel 100?

Yes, the consumption rate would be the same for either tank. The volume consumed would be the same as well. The point I was making is that there are different methods of computing consumption rates. If you compute it using psig/min then the that is only valid when comparing tanks of the same size. If it's computed using cft per min then tank size doesn't matter.

 

[H2Andy]

Yes. Cuft/min = Cuft/min. Your depth consumtion rate in psi/min will be different when comparing different size cylinders.

yes.. ok, i'm not as confused as i thought i was