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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...
Stephen Biss
Dec 21, 20227 min read
63 views
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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...
Stephen Biss
Nov 23, 20224 min read
11 views
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Canada's NRC on Traceability
Defence lawyers need to convince the criminal justice system that "traceability" of all forensic measurements is a condition precedent to...
Stephen Biss
Mar 26, 20185 min read
13 views
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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...
Stephen Biss
Mar 25, 20186 min read
13 views
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Traceability of Measurement Results is Through the Certificate of Calibration
"Traceability" is an important concept in metrology - measurement science. Defence lawyers need to study metrology, find experts, and...
Stephen Biss
Mar 2, 20186 min read
19 views
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8000C Auto-Calibration Sequence - How to Run the Auto-Calibration Sequence
Purpose of this cross-examination: To educate the Court about the calibration sequence run on the approved instrument at the factory. To...
Stephen Biss
Mar 1, 20186 min read
19 views
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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...
Stephen Biss
Feb 14, 20184 min read
18 views
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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...
Stephen Biss
Jan 10, 20182 min read
9 views
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Traceability of a Measurement Result
Purpose: To educate the Court about the meaning of "traceability" in measurement science. To obtain an admission that there is a...
Stephen Biss
Jan 9, 201812 min read
48 views
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