Bill, all of these sensors, regardless of placement, trap enough
condenser vapor inside of the second screen to throw off the oxygen
reading with time. All ccr's thus become suspect after about 3 hours.
Blowing diluent on the sensors does nothing more than accellerate this
process while temporaily relieving the problem, kind of like valium
dependency once started. 

If one were to fake the results and repeatedly show no problems past the
three hour mark, this would appear to be a breakthrough, although
inexplicable to those who understand it. Kind of like spoon bending or
psychic readings over the phone.

At 300 feet, a steadily rising real ppo2 ( while the computer reads all
systems normal) would subject the diver to the risk of tox. One has the
answer as to why there is no deco done on the cis lunar, and why the
race to get up and off the unit, even though we all know from diving
that cave repeatedly that the times are clearly bogus, and inconsistent
withing themselves, and we can all see that the decompression bears no
match to the profile.

With this cave being a 95% rectangular profile, there is no hiding
behind a mulitlevel dive compueter, so we all can plug in any constant
ppo2 and figure what really happened, which is coverd specificly in the
contract Stone had his divers sign - it is called "editing". I call it
something quite different.

Anyone who has the basic intelligence to read and write knows that to
spend 17 grand on mumbo jumbo and bullshit is ludicrous when you can go
to a long time top outfit like Carlton and buy a long time proven
rebreather or one that has all the same elements of any ccr only built
by a top company like Carlton. Only the worst moron would do otherwise.
To pay for a decompression program that is anitquted , extends the deco
and does not work is eveen mroe stupid.

Everyone knows the problems with ccr's - might as well deal with the IBM
of the business once you are willing to take the known risks, rather
than try to bullshit yourself into thinking that magic has hapopened,
and that you can go to a shade tree operator and get something better.

Keep in mind that the outstanding 15's and other miltary machines also
come withe the long term track record and REAL TESTING, and represent a
clearly superior alternative to anything from teh smoke and mirrors
crowd. 


Bill Mee wrote:
> 
> Matt,
> 
> Congratulations on the successful dive in Devils Ear. I hate to say this but
> you satill have a bit of catching up to do.  The Cis Lunar Mk 5 logged a
> "300 minute" bottom time on December 30th in Wakulla Springs and according
> to the downloads used only 9.2 SCF of oxygen.
> 
> I strongly suggest you contact Bill Stone and see if you can obtain his
> proprieary algorithm which allows you to  immediately ascend from 280ft to
> 190ft. after a 160 minute bottom time at an average depth of 280ft without
> any deep stops.  Perhaps you can also find out from him how his oxygen
> sensors can continue to tightly hold a ppo2 of 1.2 without the slightest
> deviation during this same period of time.  While you are at it you need to
> find out how they keep the water vapour from diffusing past the inner sensor
> membrane and from condensing inside, especially since the sensors are
> exposed to the warm downstream scrubber discharge and the outer enclosure is
> exposed to 68 degree water.  This is a big secret, but maybe he will share
> it with you.  I do not want to wait for Fox Television's Magics Biggest
> Secrets Part V.
> 
> Best wishes in the New Year.
> 
> Bill Mee
> 
> -----Original Message-----
> From: Garvey, Matt <garvey@ca*.co*>
> To: 'Rebreather List' <rebreather@nw*.co*>
> Date: Monday, January 04, 1999 2:08 PM
> Subject: Prism Dives
> 
> >
> >Well after several hours of test diving in the lab and in the springs
> >and cavern zones of Ocala and Gainesville; I took a Prism Topaz on it's
> >first recreational dive.  And an excellent dive it was.
> >
> >Wednesday we had spent six hours in the water at Ginnie Springs with two
> >pre-production Topaz's doing some tests and getting some film in the
> >Grand Ballroom and the Devils Eye. As result of the two units performing
> >so well, I decided to take a rig on the midnight dive on New Years Eve
> >into the Devils Ear.  I configured the rig with twin 19scf bottles: one
> >as O2, one as Diluent. I carried a waist mounted 30 scf as bailout.  It
> >would come to pass that I wasn't so happy about this configuration of
> >the bailout and I shifted the 30 to side-mount during the dive.
> >
> >The plan was to do the Ear to the Lips, up to the Park Bench and make
> >the Bone Tunnel Jump, through the Big room and back on to the Main Line.
> > The breather functioned extremely well, no discernable breathing
> >resistance, the PO2 setpoint was 1.35 and the highest it went was 1.4,
> >granted the maximum decent was a four minute drop from 60' to 100' and
> >that was when it spiked.  Having done most of my CCR, open water dives
> >on MK16's, diving the Topaz with breathing bags, while quite
> >conformable, still are a bit interesting, especially during the rapid
> >changes in depth as we saw during this dive.  Practice makes perfect and
> >that's all I'll say.
> >
> >Anyway, we turned the dive on another team member's thirds (Open Circuit
> >Diver), about 50 feet from rejoining the main line, back through the
> >Bone Tunnel, back out through the Key Hole and the Lips and out through
> >the Ear.  Total dive time 48 minutes, about 1000 linear feet
> >penetration, Max Depth 99', total O2 used: 3 scf, total Diluent used: 5
> >scf.
> >
> >Matt Garvey
> >Proj. Eng.
> >Carleton Technologies Inc.
> >Tampa, FL
> >
> >


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