Mailing List Archive

Mailing List: techdiver

Message Display

>Rich wrote:
>
>That's really interesting to know.  So that implies that there is a short 
>window between when the pellets/granules are fresh, and when they are 
>used up.  That's actually scary, because it narrows the "buffer" zone of 
>time between when there is no problem, and when there is a big problem.

The time vs FiCO2 curves from NEDU look roughly exponential to me.
Hence the *short time* between *no problem* to *big problem* is 
probably correct.  I can't currently relate the charts to some timing
of physiological events.

>On the other hand, are you sure the indicator is actually a measure of 
>bound CO2? I had always assumed the indicator was based on pH (just a 
>guess, I don't know).  If that's the case, then there may be a narrow 
>window of pH values that activate the indicator.  The disk you see may 
>just be a narrow region of the zone at the threshold of the indicator.

I may have been unclear.  The sofnolime upstream of the disk will have 
the purple indicator.  Virtually none of the sofnolime after the disk will 
have the purple indicator.  

I think you're right the indicator is pH sensitive.  I'll have to cogitate
on that.   

>Incidently, I have a special contract with Cis-Lunar not to discuss the 
>canister in any way shape or form.  

No problem, instead of discussing it just send us the technical manual :).

Barrie

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]