Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
Very interessting indeed, thanks.
I will not start staggering replacement. Right now I put 4 new cells, I will have an eye on them like I always do. I will replace them when necessary or at least in 18 month. Even if they are still OK, I do not feel fine if I know I have "old" cells.
Of topic.. how does the voting logic work on the liberty if you only use 2 cells?
Since they promote it as being "redundant" and that you only need one working side.
So when one cell goes bad, you'll replace all 4? That seems very risky to replace known good cells with unknown cells
When you buy a new rebreather all of the cells are new and from the same batch. Or will revo or other manufacturers mount different batches of cells in their new rebreather?
(When you have 4 cells of the same batch, and one cell will fail you would replace it. When 2 weeks later another cell will fail I think it would be a good thing to replace also the two cells who seems to be ok.)
( Honestly when the first cell would fail after 10 months I would replace all of them. I wouldn’t wait till the next cell will fail. The JJ has 2 batteries for the solenoid. When one battery would fail I would replace both of them and I would use the same batch.)
on a new unit they're obviously from the same batch and if 2 weeks later a second cell goes I would at least have the next one ordered, but I have never experienced that. This is very different than a battery which has significantly more predictability than an O2 cell.
No, I will replace one cell if one cell goes bad. And I will replace all cells after 18 month.
Very interessting indeed, thanks.
I will not start staggering replacement. Right now I put 4 new cells, I will have an eye on them like I always do. I will replace them when necessary or at least in 18 month. Even if they are still OK, I do not feel fine if I know I have "old" cells.
Honestly it doesn’t make sense to sell a rebreather with 4 cells of the same batch and tell the users of the rebreather that it’s not safe the replace all the cells at the same time. I think that’s what revo does or am I wrong?
I think both methods have positive and negative things. I think the older cells get the higher the risk will be that a cell will fail. With a brand new cell the risk will be low, with 5 years old cell the risk it will fail will be much higher. I do understand that JJ tells the users to use a cell maximum 15 months after manufacturing and use it maximum 12 months in a rebreather.
These conflict with each other, if you are replacing them when necessary then they will naturally end up staggered. Where did you come up with the 18 month rule?
There is only so much they can do when they build the new ones since they have to buy the cells in bulk, but I think the point is to not replace cells that don't need to be replaced "just because".
I do not see any positive in replacing all cells at once, only negatives, nor do I see any negatives in replacing them "as-needed"
If you only replace sensors as-needed, I think you will wait till you can’t use a sensor anymore and then replace it. That can be at home for me when preparing my rebreather. That wouldn’t be a problem for me.
It could be at the dive site before I would dive that could mean I would be to late for the dive and couldn’t dive.
It could also be underwater, then I should abort the dive...
It would be nice if I could replace a sensor before it would fail.