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brethalyzer Tag

Dayton DUI Attorney Charles Rowland > Posts tagged "brethalyzer"

Radio Frequency Interference

Image via WikipediaRadio frequency interference (RFI) or electromagnetic interference can arise when radio signals transmitted in proximity to a breath testing instrument are amplified in a way indistinguishable from electronic signals generated by the instrument during an analysis.  Most instruments are shielded from such interference, have RFI detectors that prevent testing if significant RFI sources are present or both.  Breath testing protocols typically prohibit the use of handheld transmitters in the proximity of the instrument while it is being operated (National Safety Council, 1992).  Subject testing protocols that include the analysis of air blanks, known alcohol samples and agreement...

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Junk Science in Ohio DUI/OVI Cases

[caption id="attachment_26" align="alignleft" width="150" caption="Intoxilyzer 8000"][/caption]When you hear a DUI/OVI attorney decrying "junk science" that is used in court, they are most likely referring to the fact that the air blown into the breath test machine for purposes of testing cannot be the same air that is exchanged with the deep lung alveolar sacs. It is impossible to limit the breath test to limit itself to deep lung alveolar air. The theory breaks down because: IF THE MAJORITY OF AIR BEING MEASURED HAS NOTHING TO DO WITH THE BLOOD EXCHANGE THEN THE TEST IS NOT MEASURING THE AMOUNT...

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