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>Chris, > >I have been doing fills for nitrox and tri-mix for quite some time as you >know. Here are a few points (developed over many years and many fills) that >may help you with your project. > >#1 The problem with maintaining gas temperature during fills is not a >problem. To expedite fills and maintain a constant gas temperature I heat the >O2 bottles before filling. I have a bunson burner under each of my O2 K >bottles, and I monitor the flame to make sure that it is always "blue". I >keep the O2 bottles at a constant 250 degrees. > >#2 The Helium is kept under ice, at a constant 10 degrees. > >#3 When filling, I always fill with the Helium first, very slowly, to ensure >that the helium does not get to warm when filling. The colder the helium, the >better. > >#4 Next I add O2, as quickly as possible, and turn the bunsons up to full >bore. Now your'e really cooking. > >#5 I skip adding air, and use with whatever I wind up with. > >#6 To ensure even blending I tie a rope to the valve of the tank and tow the >tank behind my truck. The bumpier the road the better the mix. > >#7 For maintaining temperature while diving, I use an atpak. Instead of >filling the back pak with lead, I use dry ice-this has proven to work well >over the years, and when you jump in the water the "smoke" that forms is >pretty cool. Divers just love it. > >Any questions don't hesitate to ask. > >Safe diving, >Raimo. > > As I started reading this I was dumbfounded at what you were saying, it wasn't till I had take the bait that I realizeed I had been had. Well done.! <G> Christopher M. Parrett, President, Abysmal Diving Inc. Makers of ABYSS, Advanced Dive Planning Software. 6595 Odell Place, Suite G. Boulder CO, 80301 Ph, 303-530-7248, Fx, 303-530-2808 ftp://abysmal.com/users/abysmal http://www.emi.net/gulfstream/abyss/abyss.html
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