Continuity of Alcohol Standard Solution: Keep from Freezing
Many years ago I asked for timely disclosure/production of a representative bottle of the alcohol standard lot used during the breath...
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Stephen Biss
- Nov 23, 2022
- 4 min
Ancient Egypt and DUI Metrology
If you served wine or beer at a pub in ancient Egypt the beverages were measured out using liquid volume instruments like these. Each...
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Stephen Biss
- Nov 18, 2022
- 3 min
Study the Block Diagram in the Wet-Bath Simulator Manufacturer's Manual
Tip 25: Obtain a copy of the Guth Laboratories, Inc. wet-bath "Model 2100 Simulator Operation Manual" and study the "Model 2100-Block...
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Stephen Biss
- Oct 12, 2022
- 4 min
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
- Oct 6, 2022
- 1 min
Certificate of Calibration of a NIST mercury thermometer
Tip 14: Whenever police purchase a new NIST mercury thermometer, the Canadian distributor provides them with a "Guth Laboratories, Inc....
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Stephen Biss
- Aug 20, 2018
- 9 min
2012 ATC Position Paper Built Upon Hypothesis Without Empirical Evidence
Purpose: To obtain admissions that the opinion of the Crown expert (and indirectly the 2012 ATC Position Paper) that single point control...
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Stephen Biss
- Mar 25, 2018
- 6 min
Why Does the ATC Say Single Point Control Tests are Good Enough?
Purpose: To explore the differences between a measurement instrument that has a linear relationship between the thing measured and the...
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Stephen Biss
- Feb 16, 2018
- 4 min
Measurements Under the Criminal Code of Canada Use SI Units
Purpose: To connect the Criminal Code and its wording about concentration of alcohol in units of blood with the International system of...
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Stephen Biss
- Feb 14, 2018
- 4 min
Traceability of Measurement Result on an Approved Instrument
Purpose: To obtain an admission from the CFS scientist that the traceability of a measurement result on an approved instrument or a truck...
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Stephen Biss
- Jan 21, 2018
- 1 min
Attempt to Distinguish from Jackson and Vallentgoed
Purpose: To support argument that the Maintenance History shows that the instrument was taken "out of service", for "consistently low...
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Stephen Biss
- Jan 15, 2018
- 13 min
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 11, 2018
- 10 min
Instrumental Deviations from Beer-Lambert Law
This blog entry explores the use of a university textbook during cross-examination of a CFS scientist on "Instrumental Deviations from...
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Stephen Biss
- Jan 11, 2018
- 4 min
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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Stephen Biss
- Jan 10, 2018
- 2 min
The "known" is the original calibration of the instrument
Purpose: To separate the concepts of "calibration" from "control checks" To clarify that "calibration" is something that happens at the...
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