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To: 100044.3401@co*.co* (Kevin Gurr)
Subject: Re: Rebreathers: changing diluents for decompression
From: story@be*.en*.sg*.co* (David Story)
Cc: markp@br*.co*.co*
Cc: techdiver@opal.com
Date: Wed, 26 Oct 1994 12:44:06 -0700 (PDT)

Kevin Gurr writes:
> 
> The Cis-Lunar rig is capable of switching diluents as you describe. 
:
> [...] nIn order to ensure that the switch is
> taking place at alveolar level as well, there is a simple purge routine which
> removes all the bottom mix diluent fron the loop.

What happens in 10 minutes when you've offgassed enough helium to be
noticable in the rebreather loop?  How often do you have to purge with
fresh "top mix" diluent?

Cheers,

David Story                        	        Silicon Graphics, Inc.
story@sg*.co*					Mountain View, California

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