MK6 now launched....

Blomman

O2-tank should be filled to 140bar. When it's time to refill the O2-tank you shall also change the scrubber.


// Blomman

PSquared

What a disappointment - all tease and no action.

I got the feeling reading the bumf that you pretty much wanted to have a Poseidon rep with you on the boat as they didn't want you to do anything other than open the valves and breath.

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Dinspiration

Hi

I missed the point with the 100 bar O2.... - Makes no sense to me....or this is way of them to change the scrubber with refilling the O2


DINspiration

ForTheFight

Maybe I dont understand, but it seems to me that O2 use is a poor indication of scrubber duration...I realize you need O2 to produce CO2 but there are certainly other factors.

Anyone know how much these canisters are going to cost?

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PhilSiswick

In the context of all the many discussions about the dangers of Rebreather and the contribution of poor diver skills to them, is that such a good thing?

Cheers,

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Phil

No comment on open circuit... it's an evolutionary dead end not really worth discussing here. Dave Sutton, 2007

I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007

www.hugsac.org.uk

ForTheFight

I like this line from the brochure:

"Forget everything you might have heard about PO2, scrubber life and oxygen cells."

EDIT: This is good too:

(Under the heading: "One Sensor is Enough")
"Now you can forget about multiple oxygen sensors and the confusing complexities of voting logic."

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jderman

Interested to check out the BOV... Looks cool, wonder how it performs. Other than that, I'm not sure what advantages this has over any other eccr available today (sans price).

jcbrown

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lizardland

What a disappointment. A Cis Lunar it's not. 300l of O2, I'd hope the scrubber would last longer than that anyway. The continuous calibration idea for the O2 cells sounds interesting, the brochure makes it sound like one cell is driving the whole thing. And a 40m limit? CL Mk6 would kind of imply that it was a progression on from the technology and capability of the Mk5, maybe I'm just cynical but it sounds like using the Cis Lunar name is instant marketing... everyone knows the Cis Lunar name but most new Rebreather divers will never have even seen one to know the difference. I guess it's like people with Freelanders being able to say they own a Land Rover.

Or maybe Vovo have started making Rebreather's...

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Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler

jaap

http://www.poseidon.se/DL_files/Brochure07_lowres.pdf

I and some others had a look at it and got the best answers the folks at Poseidon could provide about 10 days ago.

AFAIK The O2-cylinder is a DOT and CE approved 3l/~200 bar that wil come with the new EU-nitrox fitting (including in the US). The pdf says filling to 100 bar but the Poseidon folks told us the max filling allowed by the computer was 140 bar. If the cylinders are filled to a higher pressure it will not turn on.

The idea would be that the amount of O2-should be limited so that if the user simply always changes scrubber when O2 is refilled the scrubber will provide enough scrubbing time.

The scubber was said to be of ~2.7kg capacity depending on if the Extendair or prepacked granular one is used. To me than sound like a rather optimistic scubber duration, 2.7 kg of sorb for max 3x100-140= 300-420l O2. So that should give around ~100-150 l of CO2/kg sorb...

They mentioned that Stone would release a detalied paper about the very innovative 1+1 sensor setup of this machine. I'm really wating for that paper, I didn't quite get satisfied with how they tried to explain the online sensor validation. Does anyone know if its already avaliable?

As I got it one cell measures the gas in the loop, the other cell checks that the automatic dil/O2 orifices inject gas when they should (I think there are 4-5 micropneumatic orifices in total). At least one of the cells is repatedly validated by controlled injection of dil and O2 over the surface. It sounded like they actually inject 100% O2 over the cell to check linearity above setpoint. But since the machine is rated for 40m I had a hard time understanding how they could expect the cell to be even nearly linear at a pO2 of 5! There was some confusion about this and the Poseidon folks insisted on the fact that the machine does _not_ combine the Dil/O2 injectors to give a known but variable O2/dil mix for higher than setpoint validation at various depths during the dive.

I was impressed by the BOV with integrated ADV. Very nice! But the lever did look a little easy to break.

For strictly recreational no deco diving it could really be a very nice machine. Light, compact and "high status" . A lot more capable than say Dolphins and such...

The idea seems to be that the intended users shold not need to bother about much. The computer will warn but has a minimum of "lock down"-features. If the divers goes to deep, gets into deco or dives with dangerously low O2 or dil it will warn or demand going to OC. But it will still display deco info and keep setpoint. If the divers surfaces it will warn if its unsafe to dive again (say like violated deco) but allow you to dive. This is a safety feature in case you need to get down again.
It did not seem like there was any lock down for yearly service. They also mentioned a service program that involves sending in the head for servicing of the injectors and such. The dive centers would then have spare heads for the user while its being serviced. The cells can be changed by the user. Authorized Poseidon MK6 shops can also service the other parts (excluding the head).

One thing that I think could be a little scary its the amount of OC-bailout. It seems the idea is that the user should not need to carry separate bailout. Given at best 3l-200 bar of dil that could be on the low side should things go wrong for you or that buddy gabbing for the Cyclon octopus (Cyclon on Extreme 1:stage...that was not allowed by Posedion a few hours ago). It is possible to specify a larger dil-cylinder in the computer (O2-cyl is fixed). But that would look rather odd and require a special stand or longer hoses.

The Poseidon folks were very clear that the target was sports divers, not Rebreather-divers doing "techy" sort of diving.

Will be interseting to see if it works out having CCR-divers with pehaps much less interest and knowledged in the physics and workings of a rebreather.

They also said that there could be a techdiving version if there is enough demand from the comparatively small group of technical divers.

At first glance it looked useless for my personal needs, almost no manual controls, restricted O2-amount. Lots of warnings should you venture into deco or deeper than 40m.

But...for rec dives it could be a very smooth thing to dive, might even take the course for fun... or even worse get one or at least some of the tasty components (the DSV).

Really hope its as reliable as they say and that it sells, its definately loaded with new and innovative features!

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