Gas mixing

__vader · June 24th, 2006, 09:21 PM

Hi,
I need a spreadsheet or program to calculate gas mixing (Nitrox/Trimix)
The complete package, cuting, top off etc.

NIMROD CHEN · June 24th, 2006, 09:36 PM

Quote: (Originally Posted by __vader)

Hi,
I need a spreadsheet or program to calculate gas mixing (Nitrox/Trimix)
The complete package, cuting, top off etc.

try the GAP web page , haven't tried it but it looks nice .
you can also use GMP ( somthing like 15$ ont the GUE page ) .

Nimrod

NickB · June 24th, 2006, 10:45 PM

I use Nigel Hewitt's excellent blender software:

http://www.nigelhewitt.co.uk/diving/windows.html

Anders Knudsen · June 24th, 2006, 11:53 PM

I used to use Gap it is easy to use and free.

Now I am using the GUE program, it comes with the decoplanner - and it is from GUE

Best Regards

Anders Knudsen

*Hassan Adly* · June 25th, 2006, 07:09 PM

Hi,

Try my totally old-skool, minimalistic blending software, written in C. the total package size is 34KB

Link: http://www.futureshock.to/PPMC/

Red Sea Explorer · June 25th, 2006, 08:07 PM

Hi,

Just sent you an email with two spread sheets in a zipped folder.

Hope they are what you are looking for.

Best,

Red Sea Explorer · June 25th, 2006, 08:22 PM

Hi again,

The thing about standard mixes is that they make mixing a breez.

Basically any standard mix is Helium wiht a nitrox 32 top off.

So you only need to know one figure and the rest is easy.

To make nitrox 32 you need to put 14% pure O2 and top of with air.

So if you want to make 200 Bar of Nitrox 32 you put 28 Bar of O2 and top with air.

If you want to make 100 Bar of nitrox 32 you have to put 14 bar of O2 and top with air.

Now you know it all.

To make 200 bar of trimix 21/35, you need 70 bar of He cause that is 35%. Now you need 130 bar of Nitrox 32. if u have it premixed ....great if not it just means that you need to put 18.5 bars of O2 and the rest is air.

For 15/55 it is the same 110 bars of He and 90 bar of nitrox 32. That is 12.5 bar of O2.....

Standardized mixes kick ass

Chris B · June 25th, 2006, 08:50 PM

Quote: (Originally Posted by Red Sea Explorer)

Hi again,

The thing about standard mixes is that they make mixing a breez.

Basically any standard mix is Helium wiht a nitrox 32 top off.

So you only need to know one figure and the rest is easy.

To make nitrox 32 you need to put 14% pure O2 and top of with air.

So if you want to make 200 Bar of Nitrox 32 you put 28 Bar of O2 and top with air.

If you want to make 100 Bar of nitrox 32 you have to put 14 bar of O2 and top with air.

Now you know it all.

To make 200 bar of trimix 21/35, you need 70 bar of He cause that is 35%. Now you need 130 bar of Nitrox 32. if u have it premixed ....great if not it just means that you need to put 18.5 bars of O2 and the rest is air.

For 15/55 it is the same 110 bars of He and 90 bar of nitrox 32. That is 12.5 bar of O2.....

Standardized mixes kick ass

This is the way I do it, never seen any need to complicate it further

**jb2cool** · June 26th, 2006, 12:38 AM

but if you work purely by blending recipes then you have to empty the cylinders before filling them and losing any gas you have left from a previous dive.

graham_hk · June 26th, 2006, 06:39 AM

Quote: (Originally Posted by jb2cool)

but if you work purely by blending recipes then you have to empty the cylinders before filling them and losing any gas you have left from a previous dive.

No you don't. The benifits of standard mixes don't change becuase of residuals (this it was makes them so useful) - you can even change the standard mix and it works.

remainder 70b of 21/35 you want 210 of 15/55.

remainder helium = .35*70=24.5b
required helium =.55*210=115.5
balance helium = 115.5-24.5=91

mixing add 91b helium goes to 161b balance is 49b either with 32% or 14% 02 (6.86b) and air.

In reality you would add 90b He and 7b O2

We have used a set of standard mixes with 28% top off in the past - still owrks

Graham

June 24th, 2006, 09:21 PM	#1 (permalink)
__vader (Online) New Member Join Date: Feb 2006 Location: Denmark Posts: 87	Gas mixing Hi, I need a spreadsheet or program to calculate gas mixing (Nitrox/Trimix) The complete package, cuting, top off etc. __________________ All the best Ilhan Vardar "Vi gør det på den Norske metode - Jonas Lüttichau"

June 24th, 2006, 10:45 PM	#3 (permalink)
NickB (Online) Always lowering the tone Join Date: Dec 2005 Location: Cardiff, UK Posts: 341	I use Nigel Hewitt's excellent blender software: http://www.nigelhewitt.co.uk/diving/windows.html __________________ SnowHeads / BreastFriends / Free Money!

June 24th, 2006, 11:53 PM	#4 (permalink)
Anders Knudsen(Offline) Gadevang Underwater Explorers Join Date: Dec 2005 Location: Denmark Posts: 179	I used to use Gap it is easy to use and free. Now I am using the GUE program, it comes with the decoplanner - and it is from GUE Best Regards Anders Knudsen __________________ If someone standing on dry land tells you they're safe diving deep on air, give them a wide berth. If they're that stupid at 1 ATA, you know they won't get any smarter at depth

June 25th, 2006, 07:09 PM	#5 (permalink)
Hassan Adly(Offline) GUE Instructor Join Date: Feb 2006 Location: Red Sea Posts: 287	Hi, Try my totally old-skool, minimalistic blending software, written in C. the total package size is 34KB Link: http://www.futureshock.to/PPMC/ __________________ Hassan Adly Red Sea Discovery "Today I will finally see the sea again, which will smell of salt, wind, sand - and the cold of winter. Finally I will not only travel on it but dive in it, again I will become water, a bird - and I will remember the feeling of gliding above the abyss" Elena Sundukova, tragically lost at sea, January 2007

June 25th, 2006, 08:07 PM	#6 (permalink)
Red Sea Explorer(Offline) New Member Join Date: Jan 2006 Location: Red Sea Posts: 236	Hi, Just sent you an email with two spread sheets in a zipped folder. Hope they are what you are looking for. Best, __________________ You watch me switch. www.redseaexplorers.com

June 24th, 2006, 09:36 PM	#2 (permalink)
NIMROD CHEN(Offline) New Member Join Date: Mar 2006 Location: ISRAEL Posts: 87	Quote: (Originally Posted by __vader) Hi, I need a spreadsheet or program to calculate gas mixing (Nitrox/Trimix) The complete package, cuting, top off etc. try the GAP web page , haven't tried it but it looks nice . you can also use GMP ( somthing like 15$ ont the GUE page ) . Nimrod

June 25th, 2006, 08:22 PM	#7 (permalink)
Red Sea Explorer(Offline) New Member Join Date: Jan 2006 Location: Red Sea Posts: 236	Hi again, The thing about standard mixes is that they make mixing a breez. Basically any standard mix is Helium wiht a nitrox 32 top off. So you only need to know one figure and the rest is easy. To make nitrox 32 you need to put 14% pure O2 and top of with air. So if you want to make 200 Bar of Nitrox 32 you put 28 Bar of O2 and top with air. If you want to make 100 Bar of nitrox 32 you have to put 14 bar of O2 and top with air. Now you know it all. To make 200 bar of trimix 21/35, you need 70 bar of He cause that is 35%. Now you need 130 bar of Nitrox 32. if u have it premixed ....great if not it just means that you need to put 18.5 bars of O2 and the rest is air. For 15/55 it is the same 110 bars of He and 90 bar of nitrox 32. That is 12.5 bar of O2..... Standardized mixes kick ass __________________ You watch me switch. www.redseaexplorers.com

June 25th, 2006, 08:50 PM	#8 (permalink)
Chris B(Offline) Chris B Join Date: Nov 2005 Location: NW UK Posts: 229	Quote: (Originally Posted by Red Sea Explorer) Hi again, The thing about standard mixes is that they make mixing a breez. Basically any standard mix is Helium wiht a nitrox 32 top off. So you only need to know one figure and the rest is easy. To make nitrox 32 you need to put 14% pure O2 and top of with air. So if you want to make 200 Bar of Nitrox 32 you put 28 Bar of O2 and top with air. If you want to make 100 Bar of nitrox 32 you have to put 14 bar of O2 and top with air. Now you know it all. To make 200 bar of trimix 21/35, you need 70 bar of He cause that is 35%. Now you need 130 bar of Nitrox 32. if u have it premixed ....great if not it just means that you need to put 18.5 bars of O2 and the rest is air. For 15/55 it is the same 110 bars of He and 90 bar of nitrox 32. That is 12.5 bar of O2..... Standardized mixes kick ass This is the way I do it, never seen any need to complicate it further __________________ www.merseydivers.com www.boardmanbikes.com

June 26th, 2006, 12:38 AM	#9 (permalink)
jb2cool(Offline) Padawan learner Join Date: Nov 2005 Location: Bracknell, Berkshire Posts: 797	but if you work purely by blending recipes then you have to empty the cylinders before filling them and losing any gas you have left from a previous dive. __________________ http://jb2cool.bulldoghome.com

June 26th, 2006, 06:39 AM	#10 (permalink)
graham_hk(Offline) Pinoy ako pinoy Join Date: Nov 2005 Location: here, there and everywhere Posts: 779	Quote: (Originally Posted by jb2cool) but if you work purely by blending recipes then you have to empty the cylinders before filling them and losing any gas you have left from a previous dive. No you don't. The benifits of standard mixes don't change becuase of residuals (this it was makes them so useful) - you can even change the standard mix and it works. remainder 70b of 21/35 you want 210 of 15/55. remainder helium = .3570=24.5b required helium =.55210=115.5 balance helium = 115.5-24.5=91 mixing add 91b helium goes to 161b balance is 49b either with 32% or 14% 02 (6.86b) and air. In reality you would add 90b He and 7b O2 We have used a set of standard mixes with 28% top off in the past - still owrks Graham