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Reliability: Flooded Sample Chamber 1
It is very easy for a qualified technician to accidentally flood the sample chamber on an Intoxilyzer 5000 (or 5000C) or an 8000 (or...
Stephen Biss
Jan 4, 20233 min read


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...
Stephen Biss
Oct 12, 20224 min read


Maybe the Instrument Is No Longer Linear Enough to Be An "8000C"
Purpose: To explore the analytical variability of the 8000C as determined by the Alcohol Test Committee during evaluation of the 8000C...
Stephen Biss
May 22, 20185 min read


Police Fail to Correct a Linearity Problem on In-House Annual Inspection
Let's suppose that you obtain disclosure or Freedom of Information documents respecting In-house Periodic Inspections by your local...
Stephen Biss
Mar 29, 20186 min read


What is measurement?
Purpose: Cross-examination of a CFS scientist on the VIM. To connect "measurement" in Canadian evidentiary breath testing to...
Stephen Biss
Feb 15, 20186 min read


No Sampling of Aging Instruments in the Field
Purpose: To suggest that ATC/CFS scientists cannot provide any scientific opinion of the reliability of aging instruments out in the...
Stephen Biss
Jan 19, 20185 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...
Stephen Biss
Jan 15, 201813 min read


Linearity Studies are Done on New Instruments not Aging Instruments
Purpose: To obtain admissions that the published studies dealing with the linearity of approved instruments assume a new instrument...
Stephen Biss
Jan 12, 20182 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...
Stephen Biss
Jan 11, 20184 min read
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