#verification

May 16, 20188 min read

Annual Inspections Done Without Reference to Manufacturer's Specifications

This is a sample cross-examination of an Ontario CFS scientist on the procedure used to perform an initial factory calibration (or a...

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Mar 28, 20185 min read

Police No Longer Follow ATC Best Practices Respecting Tolerance

Purpose of this sample cross-examination: To demonstrate that when the particular instrument was first placed into service, the tolerance...

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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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Jan 10, 201810 min read

Beer-Lambert Law as Stated in Training Aid is Over-Simplified and Inadequate

This blog entry contains excerpts from the cross-examination of a CFS scientist during an over 80 trial. It was suggested to the...

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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...

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