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graham_hk · 13th May 2008, 23:16

Quote: (Originally Posted by se2schul)

Can anyone help me out with the algorithm used to calculate the loop stabilization on the RB80?

I'm also interested in how to calculate when the loop will go hypoxic during a depth change.

I am trained on the RB80, and I'm aware of the "rules" to follow to avoid hypoxia while diving the unit.
I'm also aware of a battlefield calculation to calculate at approximately what depth a gas becomes hypoxic.
I also have some simulation software that is supposed to calculate these things for me, however, the software is half German - half English, the interface is a bit "clunky", and I'm not always sure what it's doing. I'm not sure if there's a newer version of this software available.

Anyway, if anyone can help me with the loop stabilization algorithm, and the hypoxia algorithm, it would be much appreciated.

Steve,

The formula is not much use without knowing what to put in it. You will need to measure: what is your Rebreather RMV, what is the real dump ratio (any venting you might do) and how much oxygen do you metabolise.

With those figures I was able to validate the software to predict what happening with loop PO2. My swing was alot more severe than default values.

Graham

13th May 2008, 23:16	#4 (permalink)
graham_hk Custom Title Allowed! Current Rebreather/s: RB80 / Clone Other Rebreather/s: Inspiration Classic Classic Kiss MK 15.X RB80 / Clone Join Date: Nov 2005 Location: Philippines Posts: 106	Re: RB80 Math ? Quote: (Originally Posted by se2schul) Can anyone help me out with the algorithm used to calculate the loop stabilization on the RB80? I'm also interested in how to calculate when the loop will go hypoxic during a depth change. I am trained on the RB80, and I'm aware of the "rules" to follow to avoid hypoxia while diving the unit. I'm also aware of a battlefield calculation to calculate at approximately what depth a gas becomes hypoxic. I also have some simulation software that is supposed to calculate these things for me, however, the software is half German - half English, the interface is a bit "clunky", and I'm not always sure what it's doing. I'm not sure if there's a newer version of this software available. Anyway, if anyone can help me with the loop stabilization algorithm, and the hypoxia algorithm, it would be much appreciated. Steve, The formula is not much use without knowing what to put in it. You will need to measure: what is your Rebreather RMV, what is the real dump ratio (any venting you might do) and how much oxygen do you metabolise. With those figures I was able to validate the software to predict what happening with loop PO2. My swing was alot more severe than default values. Graham
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