Scrubber times

zepp · 4th November 2007, 22:37

My opinion on scrubber life

eg I plan to do two dives off a boat in one day.
Both dives will be on a wreck and I intend on a little penetration (No, not the sort you pick up on a Friday night either! )

1st dive... a planned depth of 50 mtrs and total dive time of 90 mins. I surface within a few minutes of the planned time.

2nd dive... a planned depth of 50 mts again (same wreck), I have around another 90 mins left on the scrubber so to be conservative I plan on 60 mins to be safe. I enter the wreck @ 40 mtrs and get stuck, lost or end up working harder than I thought getting that porthole off. Result is I over-do the lime and get a 'hit'...curtains closed for me so......I will re plan the second dive.
Surface after the 1st dive, open up the scrubber, bin the contents and re-pack. Result is I have so much more time to get unstuck, find my way out or get that nice piece of brass to show off when I return safely to the surface

Mark Chase · 5th November 2007, 08:33

Quote: (Originally Posted by wagger)

What is the general opinion about recommended scrubber durations set by the experts/manufacturers. I was told yesterday when at a UK inland site that I could easily do 5 hours on my inspo and the bloke saying this could do 3 hours plus on his evolution. My personal feeling is to stay inside the set scrubber times and have done so for my 63 hours on my inspo with no signs of any problems, although he also recommends getting a co2 hit just so I know what it is like. I'd prefer to avoid that myself!

So, is this the general thought throughout Rebreather divers or just another plonker with too much money?

Paul

Never do anything your uncomfortable with or don't fully understand.
The how long will my scrubber last question is like how long is a piece of string.

If I add up sofnalime fill hours against in water hours the sofnalime is way ahead of me.

On saterday I spent an hour and a half in 6m of 13c water practicing for my cave course, and today i will be binning that fill before tomorrows 55m dive which will probably be two hours max due to the sea temp.

So a very conservative approach

On the other hand, when I was in the red sea I pushed 4-5hours on the scrubber doing a deep dive in the AM (70-100m) and a shallow dive in the PM 18-25m

Water temp 26c, no particular work involved during the dives, SACs well down around my normal 15 planning mark. Around 120bar of 02 used over the 4-5hours.

Basically about as easy as these sort of dives get.

So I was happy to push it a bit on the scrubber taking all the available information into consideration. Alterations in the temperature of the water depths and my workloads would have significant impact on these decisions.

In the UK the hardest i have pushed a scrubber was on my KISS at 195mins on one 70m dive. Obviously most of the time above 15m on deco.

ATB

Mark

deanc · 5th November 2007, 12:06

3 hours is plenty of fun on a scrubber for a days' diving.

3 hours also equates to the daily oxygen exposure for 1.3 sp anyway, so for the average days diving thats a fair run.

Obviously the unit needs a wash, some dil and some O2 at home that night anyway and a rebuild, so a refill seems logical for the next day.

4th November 2007, 22:37	#11 (permalink)
zepp "Dyson with Death" daddy Current Rebreather/s: Classic Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Home Build Join Date: Sep 2005 Location: midlands Posts: 274	Re: Scrubber times My opinion on scrubber life eg I plan to do two dives off a boat in one day. Both dives will be on a wreck and I intend on a little penetration (No, not the sort you pick up on a Friday night either! ) 1st dive... a planned depth of 50 mtrs and total dive time of 90 mins. I surface within a few minutes of the planned time. 2nd dive... a planned depth of 50 mts again (same wreck), I have around another 90 mins left on the scrubber so to be conservative I plan on 60 mins to be safe. I enter the wreck @ 40 mtrs and get stuck, lost or end up working harder than I thought getting that porthole off. Result is I over-do the lime and get a 'hit'...curtains closed for me so......I will re plan the second dive. Surface after the 1st dive, open up the scrubber, bin the contents and re-pack. Result is I have so much more time to get unstuck, find my way out or get that nice piece of brass to show off when I return safely to the surface __________________ I'm not a bad person.....HONEST my homebuild photos http://www.rebreatherworld.com/photo...ery.php/cat/48 CLASSIC KISS #052
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5th November 2007, 08:33	#12 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,556	Re: Scrubber times Quote: (Originally Posted by wagger) What is the general opinion about recommended scrubber durations set by the experts/manufacturers. I was told yesterday when at a UK inland site that I could easily do 5 hours on my inspo and the bloke saying this could do 3 hours plus on his evolution. My personal feeling is to stay inside the set scrubber times and have done so for my 63 hours on my inspo with no signs of any problems, although he also recommends getting a co2 hit just so I know what it is like. I'd prefer to avoid that myself! So, is this the general thought throughout Rebreather divers or just another plonker with too much money? Paul Never do anything your uncomfortable with or don't fully understand. The how long will my scrubber last question is like how long is a piece of string. If I add up sofnalime fill hours against in water hours the sofnalime is way ahead of me. On saterday I spent an hour and a half in 6m of 13c water practicing for my cave course, and today i will be binning that fill before tomorrows 55m dive which will probably be two hours max due to the sea temp. So a very conservative approach On the other hand, when I was in the red sea I pushed 4-5hours on the scrubber doing a deep dive in the AM (70-100m) and a shallow dive in the PM 18-25m Water temp 26c, no particular work involved during the dives, SACs well down around my normal 15 planning mark. Around 120bar of 02 used over the 4-5hours. Basically about as easy as these sort of dives get. So I was happy to push it a bit on the scrubber taking all the available information into consideration. Alterations in the temperature of the water depths and my workloads would have significant impact on these decisions. In the UK the hardest i have pushed a scrubber was on my KISS at 195mins on one 70m dive. Obviously most of the time above 15m on deco. ATB Mark __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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5th November 2007, 12:06	#13 (permalink)
deanc New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2006 Location: Perth, WA Posts: 52	Re: Scrubber times 3 hours is plenty of fun on a scrubber for a days' diving. 3 hours also equates to the daily oxygen exposure for 1.3 sp anyway, so for the average days diving thats a fair run. Obviously the unit needs a wash, some dil and some O2 at home that night anyway and a rebuild, so a refill seems logical for the next day.
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