top of page

lawyers.ca duimetrology.com
905-273-3322 or 1-877-273-3322
Search
Reliability: Aging - Losing Memory
The Intoxilyzer® 8000 depicted in this video was once a reliable evidentiary breath testing instrument in the United States. It is...
Stephen Biss
Dec 28, 20222 min read
12 views
0 comments


Reliability: Ambient Conditions
Tip 41: Changing breath room ambient conditions can reduce "system calibration check" and "system blank test" reliability. Any...
Stephen Biss
Nov 30, 20228 min read
29 views
0 comments


Reliability: Cal Checks in the Context of Earlier & Later Ambient Fails
Tip 47: A calibration check using a wet-bath simulator containing alcohol standard is not reliable if information is missing about air...
Stephen Biss
Sep 2, 20222 min read
14 views
0 comments
Reliability: Disabling Ambient Fail Exception, Making Alcohol Disappear
Tip 45: Study the breath room video and learn everything you can about the breath room and detachment. Watch for: Has the qualified...
Stephen Biss
Aug 31, 20222 min read
12 views
0 comments


Reliability: Air Blanks "System Blank Test"
Tip 43: A properly functioning approved instrument air blank system (including the instrument itself, the ambient environment around the...
Stephen Biss
Aug 28, 20225 min read
21 views
0 comments


Ambient Interferents Compromise Reliability of Control Tests
Tip 48: The reliability of control tests using the alcohol standard in a wet-bath #duisimulator may be compromised by the presence in the...
Stephen Biss
Aug 18, 20222 min read
22 views
0 comments


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...
Stephen Biss
Apr 9, 20223 min read
16 views
0 comments


Change at One Point but Not at Another Point that is Equivalent
This is a sample excerpt from a cross-examination of a Crown expert using data from periodic inspection of an approved instrument. The...
Stephen Biss
Apr 13, 20185 min read
3 views
0 comments


Start By Defining "Reliability" don't focus on "Accuracy"
Purpose: To remind the Court, "thing 1" in 258(1)(c) is unconstitutional under Charter 11(d) (R v St-Onge) but is saved by section 1. To...
Stephen Biss
Apr 6, 20186 min read
14 views
0 comments


3 Consecutive Annual Inspections Reveal a Trend Towards Unreliability
Let's suppose that you obtain, as the result of disclosure or a Freedom of Information application of paper or electronic documents,...
Stephen Biss
Apr 4, 20185 min read
9 views
0 comments


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
20 views
0 comments


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,...
Stephen Biss
Feb 28, 20183 min read
22 views
0 comments


Factors Influencing Reliability
What is "reliability" in the context of a "quantitative analysis"? What does "reliability" mean in measurement science? We have a...
Stephen Biss
Feb 13, 20183 min read
37 views
0 comments


Causation of Error v. Calculation of Drift in Precision - Evidence Based Assessment of Reliability
What is the purpose in Stinchcombe/McNeil disclosure or O'Connor production of maintenance records and historical data? Crown CFS...
Stephen Biss
Feb 10, 20187 min read
7 views
0 comments


Distorted Concept of "Accuracy", "Precision", and "Reliability"
Purpose: To remind the Court of the concept of "reliability" used by the SCC in St-Onge. To educate the Court as to the definitions of...
Stephen Biss
Jan 22, 20186 min read
6 views
0 comments


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...
Stephen Biss
Jan 19, 20185 min read
7 views
0 comments


Durability Over Time
Purpose: To obtain admissions respecting the inadequacy of ATC / CFS recommendations in requiring "stability of metrological...
Stephen Biss
Jan 18, 201810 min read
5 views
0 comments


Manipulating Control Test Data to Enhance Precision
Purpose: To neutralize the government scientist's assertion that anomalous data should be excluded from calculation of precision. To...
Stephen Biss
Jan 15, 20186 min read
8 views
0 comments


Short Calibration Interval and Reliability
Why is disclosure of information about the "calibration" of the approved instrument essential to any assessment of the reliability of a...
Stephen Biss
Jan 12, 20184 min read
8 views
0 comments
bottom of page