Packing Scrubber canister.

moley

Guys and gals......can anyone help me with this?
I fully understand the possible effects on a pre packed scrubber with frequency and vibration from a moving vehicle and why that could cause your lime to 'settle' during transportation....I think its taught at ccr entry level...and I fully understand that this advice is given by people far wiser and more experienced than myself.

However, one thing really pisses me off with my unit...or any unit come to that.....why is it that the night before I can meticulously 80% build my unit in preparation for diving in my nice clean centrally heated garage and then drive to the dive site and have to bugger about in the pouring rain and howling gales (me?...exagerate?...never...I am a uk diver!!) with all that crap and gear and plastic containers in the van, and my mates fat arse in the way to meticulously prepare my life preserving stack????

In essence.....how many people pre-pack?......or am I on my own in wanting too??

Is it really a no-no?.....how many people have screwed up and had a problem that they can attribute to this? ( assuming they are still alive of course...Gulp!!)

If, as discussed on previous threads, it is commonplace to retain a partly used scrubber surely (dont keep calling me Shirley...and I aint no scrubber!!)...then transporting itfrom home ready to dive must obviously be fairly normal?

When I drive to a dive site its generally in a renault traffic van with good tyres and suspension on an metalised road....only occasionally will I take the donkey (dont worry Mike, I was'nt refering to you!!!) and trap on the cobbled road route.... I can understand the possible issue's Buster Crabb may have had with this...but hey, that was then and this is now!!!

Your comments if you will good people of the re-breather fraternity....I await your pearls of wisdom.

Thanking you.

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JonnyB

Hi,
I always pre-pack, the divesites i dive at are not that bad that i would not want to do that....

/Jonny

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hchoat

Granted, I am quite new at this, but... I've been pre-packing exclusively- I have a much cleaner environment at home than would be available at the divesite. THe last time I did this, I had a four and a half hour drive, averaging 75 miles an hour, in a 4 wheel drive truck- with no noticeable settling (I do pull the scrubber out and take a quick look to verify it hasn't settled before final set up.


Hope that helps!

Heather

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woody

Donkey??? Fat arse??? we will talk! After that i don't care if you pack it a week before, If you get a hit your on your own Huh! Bitch!!!


Luv and stuff

Mike

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schford

I always pre pack.....

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Beanie

Aways prepack, think I had a packed scrubber before driving to scapa 700 odd miles.
Can't be doing with faff in the morning, given that its pateed and shacken etc during packing I can't see it settling that much.

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EBT

Yet another vote for pre-packing. I've yet to experience any significant settling and this is on a kiss (no spring loading on the scrubber cartridge etc).

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SimonK

And a word from the DCIEM (via Yorkshire Divers)

http://cradpdf.drdc.gc.ca/PDFS/zba27/p155544.pdf

ABSTRACT: Canadian Forces divers using rebreather diving apparatus are currently restricted to pre-dive preparation times of only 6 hours. A proposal was made to increase this time to 7 days. Theoretically, this was possible; however, no empirical data were available to indicate that the chemical carbon dioxide absorbent could survive an extended storage period in Canadian Forces rebreathres. Consequently, the Experimental Diving Unit of the Defence and Civil Institute of Environmental Medicine conducted a study to determine if storage of soda lime would reduce the carbon dioxide scrubber endurance. The tests measured scrubber endurance using proposed NATO standard procedures under three conditions: (a) no storage; (b) seven days of storage; and (c) 1 hour under the endurance test conditions, followed by 7 days storage and then completion of the endurance test. The results indicated no difference between the three conditions; thereby, supporting the proposal for up to 7 days of storage. On the other hand, issues related to cold weather operations, biological hazards, heavy exertion and accelerated material wear imposed some restrictions on rebreather storage.

Simon

wizbang

I have always prepacked, but then again I have a gimbled mounted supersuspension carriage for the rebreather to lay in, NOT.

I used to prepack and then check to see if it rattled when I got to site and correct if needed but after maybe half a dozen checks it never needed topping.

That being said I have had to top up the scrubber after transit twice, after long trips but then I was doing a full system check anyway and it was no hassle.

sannerman

Yepp, Prepacking then repacking repacking repacking...

/Z

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