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Hello all, How does the Air-X Datatrack software calculate the breathing rate? I mean the software running on a PC that comes-up with cubic feet per minutes. The computer has access to the fulll [I must read too much mail from George :)] dive profile, the size of the tank (e.g. 80 cf) and the PSI used during the dive. HOWEVER, and this is the problem, it does not have access to the pressure at which the tank is rated (e.g. 80 cf @ 3000 PSI). Example 1: Do exactly identically the same dive, once with a Genesis 80 (rated approx 80 cf at 3500 PSI) and with a standard Aluminum tank (rated approx 80 cf @ 3000 PSI). The software has no way of knowing the difference between the two tanks. If you were to breathe 2000 PSI during the dive, you would use 45.7 cf on the Genesis and 53.3 cf on the Aluminum tank. Example 2: Same, with either a Genesis 100 (100 cf @ 3500 PSI) or a low pressure steel 100 (100 cf @ 2640 PSI). If you use 2000 PSI, you use 57.1 cf on the Genesis compared to 75.8 on the low pressure tank... quite a jump. BEFORE YOU REPLY, I know how to do the calculation. The only problem I have is that the Datatrack software cannot tell the difference between the two tanks above. Makes it hard to compare dives done using different tanks. And please spare me (and the other people on the alias) the details such as a Genesis 100 has 100.1 cf or the like, these are just example. The question is: How does the Datatrack software convert PSI used and size of the tank (cf) to cf used without knowing the pressure at which the tank is rated for that size. By the way, yes I can think of many different ways how they MIGHT do the conversion (all by myself, even without a buddy) ... What I want to know is which they have selected to use. RTFM: Yes, I looked throughout the manual and there is no explanation. UPGRADE: When is the new software due? Does it fix this problem? (or the one below?) Can I beta test it? Thanks in advance for the help, PierreC LIFE IS FUNNY :) Anybody noticed that the dive summary on this software is wrong! When it says: 0 - 30 ft X dives 30 - 60 ft Y dives 60 - 90 ft Z dives ... It really means 0 - 10 m, 10 - 20 m, etc. so your dive to 95 ft counts in the block 60 - 90 ft, because 95 ft is less than 30 m (98 ft)!
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