Rebreather World - View Single Post - Maybe eCCR's really aren't the wave of the future for recreational divers?

bletso · 8th June 2007, 11:47

Quote: (Originally Posted by Gill Envy)

Thanks for the input Dale. It looks like you are more on the purist end of the whole isolation debate. Thanks for the link to the article, it enjoyed reading it. could you elaborate on why you don't like HUD's?

g

Gill,

It goes to the root of human nature. Most HUD.s, rEVO included, are really secondary displays. Raw info has had decisions made on status etc. When it dispays different pulse rates, colors, etc, these indications are based on internal settings the machine makes, not you. i. e. rEvo assumes that if the PO2 is under .5 for 5 minutes, it shuts down.

Maybe, I am running that PO2. That would be my decision, and as long as it remains where I want it, my business.

I believe that the decision making is the divers responsibility, not a third party. I use two independent primary displays, both of which I can view simutaneously. If I could not view them at the same glance, then by human nature, I would probably start to rely on the one I could access the easiest and by default it would become a primary/secondary display configuration.

HUD's and displays like the rEvo funnel both cells to one controller. I would use the HUD as my primary display (human nature) and rely on the digital screen as a secondary. But, the HUD is being driven by the same circuitry, therefore no isolation between cells. If the controller goes awry, you loose all.

Don't get me wrong, the rEVO looks like a well thought out design and package, but IMO it is hindered by the funnel.

Using a system like the one I put together is two completely independent systems. Even the common case is devided into independent sections. The set points are run by me with real numbers, which translate into real values to my brain as regards PO2.

I have stated before and I might as well say it again, if you give a guy a crutch, he more than likey begin to rely on it. Buzzers, horns and other types of indicators are just such devices. One will dive and rely on the outside system to warn him of impending disaster.

Constat monitoring your PO2 is important to spot certain failure modes. I don't want to wait until the unit is telling me, OH, BTW, you have a problem.

I hope this hasn't been to confusing an expanation.

Dale

8th June 2007, 11:47	#27 (permalink)
bletso An independent diver. Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: May 2006 Location: Louisville, KY, USA Posts: 265	Re: Maybe eCCR's really aren't the wave of the future? Quote: (Originally Posted by Gill Envy) Thanks for the input Dale. It looks like you are more on the purist end of the whole isolation debate. Thanks for the link to the article, it enjoyed reading it. could you elaborate on why you don't like HUD's? g Gill, It goes to the root of human nature. Most HUD.s, rEVO included, are really secondary displays. Raw info has had decisions made on status etc. When it dispays different pulse rates, colors, etc, these indications are based on internal settings the machine makes, not you. i. e. rEvo assumes that if the PO2 is under .5 for 5 minutes, it shuts down. Maybe, I am running that PO2. That would be my decision, and as long as it remains where I want it, my business. I believe that the decision making is the divers responsibility, not a third party. I use two independent primary displays, both of which I can view simutaneously. If I could not view them at the same glance, then by human nature, I would probably start to rely on the one I could access the easiest and by default it would become a primary/secondary display configuration. HUD's and displays like the rEvo funnel both cells to one controller. I would use the HUD as my primary display (human nature) and rely on the digital screen as a secondary. But, the HUD is being driven by the same circuitry, therefore no isolation between cells. If the controller goes awry, you loose all. Don't get me wrong, the rEVO looks like a well thought out design and package, but IMO it is hindered by the funnel. Using a system like the one I put together is two completely independent systems. Even the common case is devided into independent sections. The set points are run by me with real numbers, which translate into real values to my brain as regards PO2. I have stated before and I might as well say it again, if you give a guy a crutch, he more than likey begin to rely on it. Buzzers, horns and other types of indicators are just such devices. One will dive and rely on the outside system to warn him of impending disaster. Constat monitoring your PO2 is important to spot certain failure modes. I don't want to wait until the unit is telling me, OH, BTW, you have a problem. I hope this hasn't been to confusing an expanation. Dale
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