Got the cable and downloaded the software. I was entering the information from my log book. I was trying to calculate my SAC but it wants a value that I'm not sure what it's asking for and the description in the manual doesn't help. The value is for Working P(PSI) . It looks like if I put in the value for the max atmosphere I was diving gives me roughly the same rate as the wheel that came in my NAUI class. I'm not sure if that's what it's actually asking for. The description from the manual "This is the standard pressure at which air is inserted into the tank." Any idea what they mean here?