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It’s to be dived with ONE scrubber change, you only need to change the second if you’ve exceeded the max dive time for one. So 1.3kg only.
The Revo comes with an accurate and working scrubber monitoring system that tells you the remaining time on the one scrubber — adjusted for gender and weight — and will tell you if you’ve started consuming the second scrubber. The model is accurate and because the second scrubber is monitored it knows if you need to replace both.
So 1.3kg for many hours -- 3+ in cold water. Or two dives on Monday totalling 90+ mins in a freezing cold quarry (with the monitoring system estimating 2h45 left) and 70 mins in the sea the next day with it still estimating 1h55 for the one scrubber or 2h40 for both.
Next, cells. If you’ve only got three how can you tell that TWO haven’t failed or are reading unusually? In this time of acute O2 sensor shortages, aren’t you risking your life on dodgy cells? Having five, three on the controller and two completely independent cells on your independent redundant backup means you can validate your cells in the water and you can move suspected cells to the naughty step on the backup later. Actually had this happen last week where some moisture on a cell coupled with a slow cell meant the controller voted off the working cell. It all warmed up after a while so no problems nor worries.
And trim. I see seahorses with sticky up bailouts. OK it’s a personal thing, but I’ve heard that not all units like being dived flat.Comment
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If you've got 5, how can you tell that THREE haven't failed or are reading unusually?
More (possibly conflicting) information is a recipe for disaster imo. With cell issues it's the human factors cock up thats the problem.
With three cells it's abundantly clear if you have an issue. Even the much talked about double current limited scenario. It's also possible to diagnose the issue with three cells.
I could run my unit with 4 cells but it wouldn't provide any benefit over 3. Much like with 5.Comment
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How does the stack monitoring system work Wibs?Comment
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Me, as a numpty novice, could clearly see that the weak cell (moved to number one position) was colluding with the second cell and that the other three which had all behaved that week were in agreement.
More importantly though is that you’re happy to dive without redundant cells and electronics. I’m not, so I’m very happy to have three cells on the Petrel controller and two completely separate cells with independent wiring on the backup Nerd.Comment
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It’s a tempstick.
Actually, it’s way way more sophisticated than that. The scrubbers have four dual temperature probes in the sorb and one below the can which are inductively connected to the receiver. This, in Conjunction with the controller work out the reaction front and estimate the time remaining taking into account the diver's weight and gender. Of course this will change when under work or rest, but this is easily understood with the estimated remaining time on display.
TBH I was really impressed with this tech. Saves a fortune in scrubber and would be invaluable in overhead diving.Comment
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I run 4 cells. 3 for the Inspo, and the 4th as a spare. Inspo is 123, Nerd is 124. So if one cell craps out, at least I know my spare is working when I drop to 3.
There has been at least one fatality of an experienced diver using out of date cells where one deviated and he believed the other 2. Sadly it was the 2 that were faulty together.
What's da solution kidz? What should you do with faulty cell readings?I have nothing to do with BSAC any more apart from being a muggle member. So anything I write on here is likely to be complete bollocks. Hooray!Comment
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