EMC-20H algorithm

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tyrell

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hello all
Is somewone fammiliar with the EMC-20H algorithm ?
this is the algotihm used by cochran for trimix.
I will appritiate any information regarding the algorithm.

regards

mark
 
All,

Making an educated guess based on past record and standard
older meter algorithms.

Believe it decodes as "Exponential Mike Cochrane-20 Halftimes".

So probably a standard dissolved gas, M-value, Haldane-like
approach. Like ZHL, USN, older generation meters, etc.
Exponential tissue functions are employed with halftimes
usually varying 2 minutes to 640 minutes. MC is the author,
and Cochrane founder.

Bruce Wienke
Program Manager Computational Physics
C & C Dive Team Ldr
:)
 
Bruce,

AFter speaking with Larry E@ cochran, and seeing profiles that were generated it appears the model incorporates some form of bubble dynamics(to what extent I do not know). This model is also present in the latest generation of commander nitrox computers. The stop depths and times produced over the entire dive resulted in profiles very similiar to those generated by the Explorer while in RGBM mode. There we no extended stops in the shallow depths, when tracking the computer against other computers that did deep stops, again results were similiar until the shallow stops where the times were considerably shorter (like the explorer in RGBM)

Joe
 
PADISP,

Interesting. And thanks

Some 6 - 7yrs ago, I gave Cochrane an RGBM overview.
And RGBM is also published out there. End of story.

Haven't ever seen much of anything from them in the past,
except some spirited words thrown at Suunto -- which really
were funny to me because of their religious nature and misfacts
about bubbles.

And know they had some meter deco probs in past, and hope
they have cured it now.

Sounds like it.

Regards, and thanks again,

Bruce Wienke
Program Manager Computatioal Physics
C & C Dive Team Ldr
 
Hi @ all

EMC 20H stands for:

Environmental Microbubble Consciousness 20 Halftime Tissue Compartments

This is the "same" algorithm as already implemented in the current Commander and Gemini units, except they added 4 compartments, starting from 2.5 min up to 635 min, instead of 2.5 min-480 min
(16 compartment-set). According to my information there is no other significant difference.
All Commanders with the 16-compartment-set can be upgraded to the
EMC 20H, for the Gemini it will be also possible in a few month, the Professional Version of the Analyst can be also upgraded in the near future, in order to be able to view all 20 tissue compartments.
Actually the prevous algorithm is called EMC 16H and the latest version
EMC 20H. The advantage of this version is, that the computer is now able to calculate the the gas loading (air-, nitrox-, helium mixes) even more accurate than before. So, the computer can track-up several compartments at the same time, besides the controlling tissue compartment.
 

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