Scurbber duration on Evolution Rebreather

mortenstigbach · 9th August 2006, 11:21

How long time is the scrubber duration on a Evolution Rebreather?

What if you only dive 1 hour a day - do you then "loose" the rest of the scrubber (trash it??) or can it last in the canister box ? - Temp stic ?

Morten Stig Bach

PoulO · 9th August 2006, 14:26

The manual say 2 hour. Some use it for 4 hours and a lot use it for 3 hours. It all depends on your O2 consumption, workload and other things.
Most divers use the scrubber until it has been used. I don't trash it but use it for dives on different days, no problem with that.
The tempstick shows you where in the scrubber it is active. You will get a warning when it is almost used. Don't trust the tempstick. I use it as a guideline about scrubber use, but don't use it for more then 3 hours. I got a scrubber warning after 3 hours on one dive at 25 meters.

Poul Olesen

decoweenie · 9th August 2006, 14:32

Quote: (Originally Posted by PoulO)

...I got a scrubber warning after 3 hours on one dive at 25 meters...

You need to mention the ambient temperature as well.

For comparison, I did a couple of long dives shallow on the Evolution in the beginning to see the effects of the Temp-Stick. And didn't get any alarm until after 5 hours of max depth 30m (10-30m range) in 25C.

PoulO · 9th August 2006, 14:39

Quote: (Originally Posted by decoweenie)

You need to mention the ambient temperature as well.

You are right; it was in Narvik, Norway with about 6 degree water. I have not used my Evolution outside Scandinavia so I don't know much about the effect of warm water

decoweenie · 9th August 2006, 14:41

Quote: (Originally Posted by PoulO)

...I don't know much about the effect of warm water

Are there heated pools in Denmark ?

***EBT*** · 9th August 2006, 15:17

So the answer is "2 hours, by a benchmarked, repeatable test, conducted by a proper test house", although some divers are achieving more than this in their own personal circumstances.

You AP guys are lucky, I'd love to see CE test results for my unit and many others out there.

/Zak

decoweenie · 9th August 2006, 15:47

Quote: (Originally Posted by EBT)

So the answer is "2 hours, by a benchmarked, repeatable test, conducted by a proper test house"

IMHO, the answer is... "2 hours under the worse possible conditions".

And that'd be the shortest duration limit since they are not practical test conditions that normally could be repeated in reality.

Someone could adhere to this 2-hour limit, and have a lot (and I mean A LOT) of safety. But, IMHO, it is not correct to interpret it as the upper limit.

Again, just IMHO...

***EBT*** · 9th August 2006, 15:56

We all agree that CE is worst case, but until another test level is created, peer reviewed, agreed and actioned.... its all we have. Anything outside that is just individual experience and we all know that varies according to many factors.

My point was basing your own scrubber durations on the experiences of peers is not without its flaws/drawbacks

Welcome to the wonderful world of rebreathers/internet!

**Gill Envy** · 9th August 2006, 16:38

Quote: (Originally Posted by EBT)

We all agree that CE is worst case, but until another test level is created, peer reviewed, agreed and actioned.... its all we have. Anything outside that is just individual experience and we all know that varies according to many factors.

My point was basing your own scrubber durations on the experiences of peers is not without its flaws/drawbacks

Welcome to the wonderful world of rebreathers/internet!

precicely why i like the temp stick, I'm not left to basing my scrubber duration on the experiences of peers or some worst case scenario rating... at least with the temp stick you have something a bit more objective, in real time, than having to rely on equations you make up based on estimating how the unique factors of each dive with each variation of average metabolick rate, unique metabolic rate of each dive, time at each depth, temperature range during the dive and work load, etc, etc, as compared to the rating (CE if you are lucky). While you can conceivably have break through even when the temp stick says your good (since it's not a CO2 monitor) if your really huffed and puffed (which isn't good on any scrubber) it still gives you a much better real time measure of how all these factors add up and have actually effected your scrubber.

perhaps a cogent question would be, has anyone using vision electronics gotten what they think was a co2 hit when the scrubber indicated they were still in the green and if so, under what conditions?

mortenstigbach · 9th August 2006, 17:02

Quote: (Originally Posted by decoweenie)

Are there heated pools in Denmark ?

Yes .... there are heated pools in Denmark, but at the moment water temperature is about 22-23 degress celcius at the surface.....

9th August 2006, 11:21	#1 (permalink)
mortenstigbach New Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Apr 2006 Location: Denmark Posts: 11	Scurbber duration on Evolution Rebreather How long time is the scrubber duration on a Evolution Rebreather? What if you only dive 1 hour a day - do you then "loose" the rest of the scrubber (trash it??) or can it last in the canister box ? - Temp stic ? Morten Stig Bach __________________ Morten Stig Bach
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9th August 2006, 14:26	#2 (permalink)
PoulO New Member Current Rebreather/s: Evolution Other Rebreather/s: Megalodon Join Date: Dec 2005 Location: Copenhagen Denmark Posts: 25	Re: Scurbber duration on Evolution Rebreather The manual say 2 hour. Some use it for 4 hours and a lot use it for 3 hours. It all depends on your O2 consumption, workload and other things. Most divers use the scrubber until it has been used. I don't trash it but use it for dives on different days, no problem with that. The tempstick shows you where in the scrubber it is active. You will get a warning when it is almost used. Don't trust the tempstick. I use it as a guideline about scrubber use, but don't use it for more then 3 hours. I got a scrubber warning after 3 hours on one dive at 25 meters. Poul Olesen
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9th August 2006, 14:32	#3 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by PoulO) ...I got a scrubber warning after 3 hours on one dive at 25 meters... You need to mention the ambient temperature as well. For comparison, I did a couple of long dives shallow on the Evolution in the beginning to see the effects of the Temp-Stick. And didn't get any alarm until after 5 hours of max depth 30m (10-30m range) in 25C. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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9th August 2006, 14:39	#4 (permalink)
PoulO New Member Current Rebreather/s: Evolution Other Rebreather/s: Megalodon Join Date: Dec 2005 Location: Copenhagen Denmark Posts: 25	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by decoweenie) You need to mention the ambient temperature as well. You are right; it was in Narvik, Norway with about 6 degree water. I have not used my Evolution outside Scandinavia so I don't know much about the effect of warm water
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9th August 2006, 14:41	#5 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by PoulO) ...I don't know much about the effect of warm water Are there heated pools in Denmark ? __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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9th August 2006, 15:17	#6 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 1,834	Re: Scurbber duration on Evolution Rebreather So the answer is "2 hours, by a benchmarked, repeatable test, conducted by a proper test house", although some divers are achieving more than this in their own personal circumstances. You AP guys are lucky, I'd love to see CE test results for my unit and many others out there. /Zak __________________ Eagles May Soar, but weasels don't get sucked into jet engines! Rebreather World Terms of service Real diving t-shirts for real divers
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9th August 2006, 15:47	#7 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by EBT) So the answer is "2 hours, by a benchmarked, repeatable test, conducted by a proper test house" IMHO, the answer is... "2 hours under the worse possible conditions". And that'd be the shortest duration limit since they are not practical test conditions that normally could be repeated in reality. Someone could adhere to this 2-hour limit, and have a lot (and I mean A LOT) of safety. But, IMHO, it is not correct to interpret it as the upper limit. Again, just IMHO... __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

9th August 2006, 15:56	#8 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 1,834	Re: Scurbber duration on Evolution Rebreather We all agree that CE is worst case, but until another test level is created, peer reviewed, agreed and actioned.... its all we have. Anything outside that is just individual experience and we all know that varies according to many factors. My point was basing your own scrubber durations on the experiences of peers is not without its flaws/drawbacks Welcome to the wonderful world of rebreathers/internet! __________________ Eagles May Soar, but weasels don't get sucked into jet engines! Rebreather World Terms of service Real diving t-shirts for real divers
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9th August 2006, 16:38	#9 (permalink)
Gill Envy Shearwater Copis Diver Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,225	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by EBT) We all agree that CE is worst case, but until another test level is created, peer reviewed, agreed and actioned.... its all we have. Anything outside that is just individual experience and we all know that varies according to many factors. My point was basing your own scrubber durations on the experiences of peers is not without its flaws/drawbacks Welcome to the wonderful world of rebreathers/internet! precicely why i like the temp stick, I'm not left to basing my scrubber duration on the experiences of peers or some worst case scenario rating... at least with the temp stick you have something a bit more objective, in real time, than having to rely on equations you make up based on estimating how the unique factors of each dive with each variation of average metabolick rate, unique metabolic rate of each dive, time at each depth, temperature range during the dive and work load, etc, etc, as compared to the rating (CE if you are lucky). While you can conceivably have break through even when the temp stick says your good (since it's not a CO2 monitor) if your really huffed and puffed (which isn't good on any scrubber) it still gives you a much better real time measure of how all these factors add up and have actually effected your scrubber. perhaps a cogent question would be, has anyone using vision electronics gotten what they think was a co2 hit when the scrubber indicated they were still in the green and if so, under what conditions? __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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9th August 2006, 17:02	#10 (permalink)
mortenstigbach New Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Apr 2006 Location: Denmark Posts: 11	Re: Scurbber duration on Evolution Rebreather Quote: (Originally Posted by decoweenie) Are there heated pools in Denmark ? Yes .... there are heated pools in Denmark, but at the moment water temperature is about 22-23 degress celcius at the surface..... __________________ Morten Stig Bach
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