injection rate

heyydude · 29th April 2007, 23:53

Quote: (Originally Posted by maischan)

How to select the right injection rate on a Meg?

What are the recommendation or best practices Meg Owner have?

BTW is this option available on other CCR?

Hi,

The "HammerMeg" allows the end-user to select a number of variations of solenoid firing, including our own proprietary algorithm for maintaining set-point very accurately.

You convert your Megalodon Head to a "HammerMeg" by (a) shiping your Meg Head to us for changeover, or (b) ordering a replacement Head from ISC and having them ship it to us.

To date, we've converted over 30 Megs like this, with very happy customers.

Kevin Juergensen
Juergensen Marine, Inc.

***jradomski*** · 30th April 2007, 03:55

Quote: (Originally Posted by wondersea)

I understand now why you talk with 1.3 reference sp. With this data I am agree, naturally, with the 32 %. In fact, I am a new Meg diver and during my training I will be teach to stay with bottom sp 1.0 for dive up to 40m and change during ascend a sp like 1.3/ 1.4 for the deco. The explaination was that with a bottom sp at 1.0, I have more marging and more time reaction with almost the same deco optimisation later than if I was at 1.3. So there is no need to set a sp more than 1.0.
But, I have no other reference than my instructor, so I am also listening with attention some other explaination.
In the Andy Meg book, that I read too, I did'nt notice neither a preconize bottom sp.

well at 30m, a 1.3 will give a few minutes more no deco time than a 1.0.. the deeper you go the less this difference (1.0 v 1.3) will make..

at 40m diving a 1.0 is slightly worse than an oc diver using air.. (1.0 vs 1.05)
using lower po2s in this range is like saying its better to use air than nitrox..

Hell.. if you don;t need 3 hours of dive time per day, for these shallow dives there is nothing wrong with bumping up your po2 to a 1.4..

the 1.3 is a convenient number for many CCR divers because many scrubbers are rated at 3 hours and a 1.3 allows a 3 hour single dive exposure..

Higher po2s make a bigger difference shallow than they do when deep.. on dives that I use a relaxed po2 (~1.0 - 1.1), I'll generally start bumping it up around 50m to start optimizing the deco..

29th April 2007, 23:53	#21 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 340	Re: injection rate Quote: (Originally Posted by maischan) How to select the right injection rate on a Meg? What are the recommendation or best practices Meg Owner have? BTW is this option available on other CCR? Hi, The "HammerMeg" allows the end-user to select a number of variations of solenoid firing, including our own proprietary algorithm for maintaining set-point very accurately. You convert your Megalodon Head to a "HammerMeg" by (a) shiping your Meg Head to us for changeover, or (b) ordering a replacement Head from ISC and having them ship it to us. To date, we've converted over 30 Megs like this, with very happy customers. Kevin Juergensen Juergensen Marine, Inc.
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30th April 2007, 03:55	#22 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,895	Re: injection rate Quote: (Originally Posted by wondersea) I understand now why you talk with 1.3 reference sp. With this data I am agree, naturally, with the 32 %. In fact, I am a new Meg diver and during my training I will be teach to stay with bottom sp 1.0 for dive up to 40m and change during ascend a sp like 1.3/ 1.4 for the deco. The explaination was that with a bottom sp at 1.0, I have more marging and more time reaction with almost the same deco optimisation later than if I was at 1.3. So there is no need to set a sp more than 1.0. But, I have no other reference than my instructor, so I am also listening with attention some other explaination. In the Andy Meg book, that I read too, I did'nt notice neither a preconize bottom sp. well at 30m, a 1.3 will give a few minutes more no deco time than a 1.0.. the deeper you go the less this difference (1.0 v 1.3) will make.. at 40m diving a 1.0 is slightly worse than an oc diver using air.. (1.0 vs 1.05) using lower po2s in this range is like saying its better to use air than nitrox.. Hell.. if you don;t need 3 hours of dive time per day, for these shallow dives there is nothing wrong with bumping up your po2 to a 1.4.. the 1.3 is a convenient number for many CCR divers because many scrubbers are rated at 3 hours and a 1.3 allows a 3 hour single dive exposure.. Higher po2s make a bigger difference shallow than they do when deep.. on dives that I use a relaxed po2 (~1.0 - 1.1), I'll generally start bumping it up around 50m to start optimizing the deco.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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