Traceability

Dec 21, 20226 min read

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...

Nov 23, 20224 min read

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...

Mar 26, 20185 min read

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...

Mar 25, 20186 min read

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...

Mar 2, 20186 min read

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...

Mar 1, 20186 min read

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...

Feb 14, 20184 min read

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...

Jan 10, 20182 min read

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...

Jan 9, 201812 min read

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...

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