New Submatix ECCR

jaap

Well in the specifict case of this thread it might not be that easy.

If you perhaps have 2 lpm O2 plus the ordinary "KISS"-flow going into the loop? Thats a little more than 3 times the "usual" KISS-flow. How much will that offset your diluent flush verification? Not speculating on depth, choice of dil, loop volume, rate of dil injection or location of cells vs dil injection I would dare to say chances are it can screw up your dil flush. Shure it might not be an issue. And shure you can perhaps shut the O2 off and do the dil flush. But does the whole thing get safer by making it more complicated with more potentially likely odd things going on requiring special attention?

Matthias don't get me wrong, I only used 2 cells for mccr myself. I just don't get how the solenoid control works for this system.

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Dave Sutton

And the answer is, naturally: "It depends".

Ambiguous answer.... intentionally.

That very ambiguity is the reason I've never understood the "let's add a PP02 controller to a KISS rebreather" line of modification. Same as the "We train Meg divers to manually control PP02 and have the setpoint lower than desired so it can take over from thje diver" school of thought. or the "Let's add an orifice feed to a Mark-15" idea. I just don't get it. I'm quite happy to be in one camp or the other.. but not with one foot in each puddle.

But, what this one is, is what it is. It's a mCCR with a parachute controller. Consider it thus and then discuss it for what it is. At least we'll all be working under the same assumption set.


Dave

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MatV

Given the relatively small loop volume, you will definitely feel the bouancy change, with your mentioned runaway solenoid, or a cell going down. As the oxyscan governing the solenoid is fixed, you have to compare with the other one which is not branched to the electronics.
And, as you mentioned, either close the oxygen supply, flying manually, or, in a case of a cell running away high, rely on the low flow orifice and oxy flush function.
What I'd like, then, was an option to close down the electronics, or shut it down pneumatically, for instance by independent oygen regs, one for the KISS flow, one for the solenoid.

Matthias