Change of Response at One Point but Not at Another Point that is Equivalent
Purpose: To suggest that there is empirical evidence in the matter before the Court of change in response by the approved instrument at...
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Stephen Biss
Sep 7, 20223 min read
Ambient Fail Threshold 5, 10, 19, 20 ?
We know that the ambient fail threshold (the mg% point at which the exception error is flagged) on both the Intoxilyzer 5000/5000C and...
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Stephen Biss
Sep 4, 20223 min read
Reliability: 64 in 2011 Ambient Threshold Changes, Elevated Zero, Purge Fail
This is the same Intoxilyzer® 64 with upgraded keyboard and (software) serial number depicted in the blog "Ambient Conditions Change...
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Stephen Biss
Sep 2, 20222 min read
Reliability: Cal Checks in the Context of Earlier & Later Ambient Fails
Tip 47: A calibration check using a wet-bath simulator containing alcohol standard is not reliable if information is missing about air...
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Stephen Biss
Sep 2, 20222 min read
Ambient Conditions Change Baseline 0 on an IR Breath instrument - Disappearing Alcohol
Experiment studying the phenomenon of disappearing alcohol It is easy to replicate this experiment on an Intoxilyzer® 5000. It is more...
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Stephen Biss
Aug 31, 20222 min read
Reliability: Disabling Ambient Fail Exception, Making Alcohol Disappear
Tip 45: Study the breath room video and learn everything you can about the breath room and detachment. Watch for: Has the qualified...
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Stephen Biss
Apr 9, 20223 min read
Reliability - Calibration is a Curve
Tip 50: When an "approved instrument" is calibrated at the factory, the manufacturer doesn't simply adjust the electronics in the...
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Stephen Biss
Jan 15, 201813 min read
Is an Approved Instrument Really a Screening Device?
Purpose: To suggest that an AI is a quantitative analysis instrument and an ASD is a qualitative analysis instrument and suggest that the...
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Stephen Biss
Jan 13, 201817 min read
R. v. Vallentgoed Distinguished on facts - Short Calibration Interval
Purpose: To obtain admissions from the Crown expert to enable argument that Vallentgoed can be distinguished on its facts - particularly...
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Stephen Biss
Jan 11, 20184 min read
Bandwidth of Filters Changes Over Time
Sample cross-examination of CFS scientist on aging IR filters. IR instruments use light filters at the end of the sample chamber. As...
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