#calibration

Oct 6, 20221 min read

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....

14 views0 comments

Stephen Biss

Apr 9, 20223 min read

Reliability - Calibration is a Curve

Tip 50: When an "approved instrument" is calibrated at the factory, the manufacturer doesn't simply adjust the electronics in the...

13 views0 comments

Maybe the Instrument Is No Longer Linear Enough to Be An "8000C"

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...

27 views0 comments

BAC Analysis in a Lab Without Bracketing Controls is at Best Qualitative not Quantitative

Stephen Biss

Apr 27, 20184 min read

BAC Analysis in a Lab Without Bracketing Controls is at Best Qualitative not Quantitative

We have a serious problems in the Canadian criminal justice system. One of them is the failure of Parliament and the Courts to recognize...

12 views0 comments

Relevance of Contemporaneous Documentation by Inspector Taking Instrument Out of Service

Stephen Biss

Apr 20, 20184 min read

Relevance of Contemporaneous Documentation by Inspector Taking Instrument Out of Service

Let's suppose that as a result of a disclosure request or Freedom of Information application you find an electronic or paper document...

12 views0 comments

Police Fail to Correct a Linearity Problem on In-House Annual Inspection

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...

19 views0 comments

Police No Longer Follow ATC Best Practices Respecting Tolerance

Stephen Biss

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...

7 views0 comments

Stephen Biss

Mar 25, 20182 min read

Establishment of Calibration Intervals

The concept of "calibration interval" is an important one in measurement science. Unfortunately most criminal law lawyers and Judges are...

6 views0 comments

Internal Standards Also Need Calibration and Calibration Interval

Stephen Biss

Mar 24, 20185 min read

Internal Standards Also Need Calibration and Calibration Interval

Purpose: To explain the function of internal standards, the ITP, internal test procedure to the Court. To obtain an admission that the...

7 views0 comments

Stephen Biss

Mar 23, 20183 min read

Response Drifts Over Time

In an article relied upon by the SCC in St. Onge, Brian Hodgson stated: Defence lawyers need to educate themselves about the meanings of...

11 views0 comments

Traceability of Measurement Results is Through the Certificate of Calibration

Stephen Biss

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...

15 views0 comments

8000C Auto-Calibration Sequence - How to Run the Auto-Calibration Sequence

Stephen Biss

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...

19 views0 comments

How to Calibrate - Teach an AI - Build the Inverse Logarithmic Calibration Curve

Stephen Biss

Feb 28, 20183 min read

How to Calibrate - Teach an AI - Build the Inverse Logarithmic Calibration Curve

Purpose: To educate the Court about the Analytical Theory of the 8000C Optical Bench including Emitter, Sample Chamber, Dual Detectors,...

22 views0 comments

Calibration Laboratory Requires Accreditation

Stephen Biss

Feb 26, 20182 min read

Calibration Laboratory Requires Accreditation

Purposes: To obtain an admission that calibration or re-calibration needs to be done by an entity that is accredited by ASCLD/LAB ANLAB...

3 views0 comments

AI Hardware and Software Can't Measure Without Learning and Re-Learning

Stephen Biss

Feb 25, 20186 min read

AI Hardware and Software Can't Measure Without Learning and Re-Learning

Purpose: To educate the Court as to the "why" of the unreliability of an approved instrument to measure across the measuring interval if...

0 views0 comments

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...

6 views0 comments

Traceability of Measurement Result on an Approved Instrument

Stephen Biss

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...

17 views0 comments

Stephen Biss

Jan 21, 20181 min read

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...

7 views0 comments

Stephen Biss

Jan 18, 201810 min read

Durability Over Time

Purpose: To obtain admissions respecting the inadequacy of ATC / CFS recommendations in requiring "stability of metrological...

4 views0 comments

Control Tests do not displace Formal Calibration Intervals

Stephen Biss

Jan 13, 20187 min read

Control Tests do not displace Formal Calibration Intervals

Purpose: To separate conceptually control tests from calibration To obtain an admission that there are no "assessors" in the province of...

23 views0 comments

lawyers.ca duimetrology.com

905-273-3322 or 1-877-273-3322