On 16 September, 2014 - Davide DB wrote: > Il 16/set/2014 17:36 "Anton Lundin" <[email protected]> ha scritto: > > > > On 16 September, 2014 - Davide DB wrote: > > > > > Maybe it was already explained. > > > > > > Why SAC should be different between these two tabs if just one dive is > selected? > > > See attachment (its' a PSCR dive). > > > > They are different, because one is per gas and one is for the whole > > dive. > > Ok > > > > > > > The nice message: "These gases could be mixed..." just refers to the > > > back gas? (I see plural form) > > > > It referees to all the gases listed there. > > > > My Mixer app splits those into: > > > > 18/45 898L => 405L he + 73L O2 + Air > > 50% 276L => 101L O2 + Air > > 100% 109L => 109L O2 > > > > Which is equiv to 405L he 283 O2 which is pretty close to the 404.2L he > > and 285.1L O2 which subsurface calculates for you. > > > > > If I use two trimix mixes it gives both calculation? > > > > > > > I wrote that code because i thought it was a good tool to verify my > > gas-bill after a trimix trip and to "diff" how much expensive gas i > > needed to drain =( > > I agree on everything and I followed with great interest your messages on > this topic. > I like to understand how much $$$ I spend for a dive or a set of dives. > But here IMHO the message is misleading because it seems an indication on > how to get the mix done but it isn't. it's the global consumption for each > gas used. > Am I correct? >
I don't really understand your question, but here is something that probably answers something at least. What it prints is the _actual_ gas consumed. If you drain a cylinder after that to mix new gas in that cylinder, that gas isn't included in this computation. Eg. Subsurface might say that i spent 13000L He and 7000L O2 on a trip, and my gas bill says 15000L he and 9000L O2, and both of them are accurate. That means that i ether had tx/nx in my cylinders on my way home, or that i needed to drain gas during that trip. The inverse might also be true, and that would say that i had mix in my bottles when i went on that trip. //Anton -- Anton Lundin +46702-161604 _______________________________________________ subsurface mailing list [email protected] http://lists.hohndel.org/cgi-bin/mailman/listinfo/subsurface
