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DUI Metrology Dictionary
A strange phenomenon whereby some of the ethyl alcohol vapour concentration introduced into the breath tube from a subject or some of the ethyl alcohol vapour concentration introduced into the Intoxilyzer inlet from the wet-bath simulator or dry gas/air gas seems to disappear. The phenomenon is a result of zero for instrument purposes being elevated during prior air blanks.
Ambient Conditions Change Baseline 0 on an IR Breath instrument - Disappearing Alcohol
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