just to let you know

[NARKEDAT30]

Just a quick post to submatix owners of a little incident that happened to me on Thursday on a YD trip out of Brid. Pre dive checks and pre breath were as expected with no signs of any problems. Entry and commencement of descent were fine until at about 10 mtrs I attempted to increase set point. ( I use two Oxyscans ) one cell reading dropped from .63 ish to .18 and 'froze'.The second cell reading increased to .85 ish and would not increase any further . I continued the descent whilst manualy injecting O2 at my usual rate but as neither cell was responding correctly it was time to bail out and end the dive.Back on the deck both cells were reading rubbish. Back home on stripping the unit there were no signs of water or condensation in the lungs.One of the cells is about 9 months old the other was new two days earlier......any thoughts appreciated but the purpose of the post is just by way of feedback and information. Regards Narked.

[Phoenix]

Your cells were reading rubbish but you continued the descent? why you people will dive a rebreather with only 2 cells I'll never understand, cutting corners to save a few quid is going to bite you in the end.

Ian

[sexydivebuddy]

Originally Posted by Phoenix

why you people will dive a rebreather with only 2 cells

ian,
speaking for myself here, i have only two cells at present but am making serious enquiries [and will] upgrade to accomodate for a third cell within the very near future. my unit is an old model, so this does involve some new bits and pieces.
i am led to believe that this is so for some of us, hence the invitation to attend the blue lagoon open day to view the upgrades, and any other new innovations that might be applicable to our own units.
i do agree wholeheartedly with you that a third cell is a must, in whatever form, if not strongly advised. in fact ian, a recent dive tipped me over into wanting my third cell insitu yesterday!
narked did not state as to whether his unit is a recent model or not.
as with everything in life, submatix are moving forward but some of us are caught up within the past, present and future time frames!
lesley.

[sexydivebuddy]

Originally Posted by NARKEDAT30

Just a quick post to submatix owners of a little incident that happened to me on Thursday on a YD trip out of Brid. Pre dive checks and pre breath were as expected with no signs of any problems. Entry and commencement of descent were fine until at about 10 mtrs I attempted to increase set point. ( I use two Oxyscans ) one cell reading dropped from .63 ish to .18 and 'froze'.The second cell reading increased to .85 ish and would not increase any further . I continued the descent whilst manualy injecting O2 at my usual rate but as neither cell was responding correctly it was time to bail out and end the dive.Back on the deck both cells were reading rubbish. Back home on stripping the unit there were no signs of water or condensation in the lungs.One of the cells is about 9 months old the other was new two days earlier......any thoughts appreciated but the purpose of the post is just by way of feedback and information. Regards Narked.

narked, which cells were you using? there is a 6th month guarantee on cells so you should be able to redeem one of them. either see your dealer or contact germany.
lesley and cells have history together!

lesley.

[David]

Originally Posted by Phoenix

Your cells were reading rubbish but you continued the descent? why you people will dive a rebreather with only 2 cells I'll never understand, cutting corners to save a few quid is going to bite you in the end.

Ian

I understand where your comming from. but why stop at 3 or 4 cells ? :-)

if it were for cost reasons you would not dive RB.

the decent bit worried me too but reading :-

"any thoughts appreciated but the purpose of the post is just by way of feedback and information."

it all made some sence the op was looking for some help so this problem did not happen again.

so what did cause this problem. ?

David

[Decodiver]

How long had your new cell been out of its packaging?

Cells need 24 - 48 hours to wake up when taken out of the packaging.

Cheers,

Dave Cooper.

[Nick Kay]

Originally Posted by Decodiver

How long had your new cell been out of its packaging?

Cells need 24 - 48 hours to wake up when taken out of the packaging.

Cheers,

Dave Cooper.

You're recommended (or least I was told) to put 100% O2 through the cell when you first unpack it

[Gaz46]

As Nick says you need to run 100% o2 through the cells once they're opened and let them settle down again before re calibrating them again. I don't know what you've done or if you've done anything wrong at all but it is concerning that you continued to decend knowing that you had a problem with both cells. I have had my fair share of problems with cells and I know of a few others who have had even more, but my cells always go off on one then come up with 'SET'... normaly SET 3. I have one winging its way to me now after one of mine played up and its being replaced under warrenty, there does seem to be a problem and this SET 3 has never been explained to me. I suggest you email Germany and give them dates and details of what the cells did and see what they say, they do seem to be very helpful when approched with problems with the equipment. It is strange though that both cells go down together with different faults. No doubt the INSPO boys will be able to give some tips as I understand they too have their fair share of problems with cells. After night diving I have decided that a HUD with an independant cell is a must, If you had one you could have at least got out knowing you were breathing a good mix. To be honest I think they should come with a HUD as standard and 3 cells should be the minimum HSE requirement. Gaz

[Nick Kay]

My understanding is that the "new" electronics with VR3 i/f, and O2 parachute will run 2 x dual cells

#1a will run an oxy, #1b will run the vr3
#2a will run an oxy, #2b will run the O2 parachute

The HUD is dual'ed over (I think) #1a and #1b

Hope this makes sense

[Nick Kay]

The Boris URM

looks like a neat bit of kit - if you have a Vr3