Gas Blending Calculations

***Beanie*** · 26th June 2006, 14:01

I'm just filling in 5 minutes at work by creating a quick crib sheet ot go in my blending / booster box. I have the start from empty Gas blending calculations, well I think there right:

Trimix
He Pressure: He * Fill Pres
O2 Pessure: (O2 / (1 - He) -.21) / .79) * (Fill pres - He Pres)

Nitrox
O2 Pessure: (O2 -.21 / .79) * (Fill pres)

But I want the ones for top ups, I know there in various books which I have at home but I want to do it now and then put the calculations over in Scupedia.

So if you guys could check my calculations and let me know what the top up ones are. I'd be greatful.

diverklondike · 26th June 2006, 14:49

Beanie,

Here is a link to a great set of gas mixing references...

http://www.advanceddivermagazine.com/GasStationPage.htm

I keep a copy next to my booster...

Many thanks to Curt for making this part of his ADM site...

Dive Safe...

Mark

***Beanie*** · 26th June 2006, 14:56

Very nice apart from I use Bar

don't be understanding them PSi

26th June 2006, 14:01	#1 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,327	Gas Blending Calculations I'm just filling in 5 minutes at work by creating a quick crib sheet ot go in my blending / booster box. I have the start from empty Gas blending calculations, well I think there right: Trimix He Pressure: He * Fill Pres O2 Pessure: (O2 / (1 - He) -.21) / .79) * (Fill pres - He Pres) Nitrox O2 Pessure: (O2 -.21 / .79) * (Fill pres) But I want the ones for top ups, I know there in various books which I have at home but I want to do it now and then put the calculations over in Scupedia. So if you guys could check my calculations and let me know what the top up ones are. I'd be greatful. __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk Last edited by Beanie : 26th June 2006 at 14:08.
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26th June 2006, 14:49	#2 (permalink)
diverklondike RBW Member Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,778	Re: Gas Blending Calculations Beanie, Here is a link to a great set of gas mixing references... http://www.advanceddivermagazine.com/GasStationPage.htm I keep a copy next to my booster... Many thanks to Curt for making this part of his ADM site... Dive Safe... Mark
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26th June 2006, 14:56	#3 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,327	Re: Gas Blending Calculations Very nice apart from I use Bar don't be understanding them PSi __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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