Submatix CCR

TR300

Hi Ron,

I had / have the same problems, with my earlier submatix conversation I had a very strong flow (up to 100 l/min O2) when I pushed the add button, this was for 1 - 2 seconds enough to fill and mix the loop with O2 (the ppO2 rises).

In an other project (TR300) I use the Submatix booster and here I have the same phenomena you described and I add the O2 there in the exhale loop. I can hold the push button long time with only low rising O2, I am not sure but I think the flow speed is to small to mix the loop.

I have checked out the Sensors (easy doing just have a breath and blow them out throughout an O2 Monitor )

I will do some more test later the week and will use mine old pushbutton, I give you then a report :-)

First time I had also thinking the ADV fires Diluent but I have closed them and the problem occurs steady.

I have found a picture from my modification

Holger

Attached Images

tecccr12.jpg (14.8 KB, 284 views)

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Andyabyss

HI, We are the Uk distributor of the Submatix and can feed some info into this enquiry.

Firstly, we sell the unit with our own Gravity Zero Harness / backplate and wing combo. Nice, neat and compact with minimal drag in the water. Also, the plate is 'T' shaped so the cut outs allow very neat hose routing under your arms etc... look at our website and you will see. We too weren't keen on the Submatix Over the Shoulder BCD... too cumbersome.

For the MCCR modifications, we have made up some 'injector nozzles' which fit into the base of the scrubber and inject the O2 up into the downflow pipe of exhaled gas. This allows the O2 to mix in the inhale gas PRE SCRUBBER. By the time it passes the O2 cells in the inhale bag we have a good mix with a lower risk of spiking... I have a web link here to a customer's website... you can see how it is installed... we are still fine tuning it and I have requested that Submatix consider it carefully as a standard fit... I would really appreciate your feedback as to whether you think it is a good idea or not..?

Please feel free to contact me for any other details...

Best regards,

Andy

Weblink

paulraymaekers

hello, looking at the picture, I think in the submatrix MCCR they use an unmodified clippart valve, (or am I wrong??)

be very careful with these valves, we have more then 500 hours CCR experience with them, enless you modify them, they are very dangerous: they can stay open, if the backpressure decreases when you go down, resulting in free-flowing oxigen: we had this unpleasant experience on 5 different units, during dives between 40 and 90m: reason: the internal spring is very weak. In our rEvo we change the spring by a much stronger one, since them no more freeflowing oxigen anymore

regards
paul

Marc T

Paul,

I think its a home made "improvment" on this picture
the submatix mCCR uses a modified BCD inflator and o2 flow is in the in the inhal bag through the ADV.
Much more dangerous if you have a free flow on o2!

TR300

Hi Paul,

thanks for your comment, yes we had this freeflow with the clippart too.
I am not diving the Submatix any longer.

It was our first try. The modification for inject in the inhale side of the scubber sounds better, the O2 can mix better.

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TR300

Hi all,

now I have my new Submatix CCR100SMS.

I got the Version with the split counterlungs



at the exhale counterlung I fixrd via an P-Con the inlet for the oxygen supply

the diluent can also be connected external. I use therefore a slingbottle and a GCS system.



My wing and backplate are from ExD. The ExD wing has a spread inner part, so the BC will outside the Submatix housing



For the oxygen controll I use the Submatix BOOSTER PRO. (I also use sometimes the Hydrogom )



This configuration works very well.

For the oxygen sensors I use a housing from TecMe direct in the inhale hose.

Nice unit to dive



The original configuration (CE) from Submatix uses the ADV (at the inhale side of the counterlung) to add the oxygen, also the oxygen sensors (two) are connecte to the inhale counterlung.

Holger

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