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Stephen Biss
Jan 4, 20233 min read
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...
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Stephen Biss
Oct 12, 20224 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...
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Stephen Biss
May 22, 20185 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...
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Stephen Biss
Mar 29, 20186 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...
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Stephen Biss
Feb 15, 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...
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Stephen Biss
Jan 19, 20185 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...
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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 12, 20182 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...
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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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