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On Fri, 14 Nov 1997, Andrew Drapp wrote:

> With a +/-2% level of accuracy, the measured value will be within 2% of
> the value, not 4%.  Say you were measuring the F02 (OK, actually PP02) of 
> a mix with 10% O2.  Exactly 10% O2.  The reading would be somewhere 
> between 9.8% and 10.2% (+/-2% of the measured value.) How presice do you 
> need your FO2 measurements? 

No, its +/-2% of full scale (100%), not the reading, so for
10%, it could read from 8% to 12%.   And since I frequently
mix in the 8%-15% O2 range, I'd like it to be more precise.

-Will
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