Although an approved instrument has been properly maintained and operated, and is functioning in accord with manufacturer's specifications, there may exist unusual ambient or physiological presentations not contemplated by the design of the instruments. In those unique circumstances, the results of the analysis may appear to be reliable yet are false or exaggerated positives. See R. v. St-Onge Lamoureux at paragraph 78 and R. v. Kasim 2011 ABCA 336.

You can learn more about these ambient and physiological presentations by taking the online courses described in the "Members" section of this site.

You can learn more about ambient system failures on the 5000 by visiting our ambient failures YouTube Channel.

 

You can learn more about mouth alcohol bias on the 5000 by visiting our mouth alcohol Youtube Channel.