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[Much rebreather philosophy snipped]
, I would turn
>off electronics and manually dive it for whatever time was appropriate 
for
>the depth- shallow forever, deep until I got shallow. For 
non-rebreather
>divers and for non-diving-scientist-rebreather experts, this is a hard
>concept to swallow. A physiologist/biochemist must know and trust 
buffers;
>a CC rebreather diver must know and trust sensors.

Though knowledge of suitability of buffers is essential to run an 
experiment, trusting them is another matter.

The buffer capacity of a given sol'n is conc. dependent, which is 
checked using elecronics & primary standards.  Thus it is not trusting 
the buffer as much as trusting the parameters that are measured vis a 
vis that buffer.  I would proffer that the same would apply to sensors 
& if one, by gut feeling, is deemed accurate & used, while the other 
two R rejected, some re-evaluation of the method should be considered.

Regards

Esat Atikkan

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