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...
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Stephen Biss
Sep 2, 20222 min read
Ambient Conditions Change Baseline 0 on an IR Breath instrument - Disappearing Alcohol
Experiment studying the phenomenon of disappearing alcohol It is easy to replicate this experiment on an Intoxilyzer® 5000. It is more...
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Stephen Biss
Aug 31, 20222 min read
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...
12 views0 comments
Stephen Biss
Aug 28, 20225 min read
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...
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Stephen Biss
Jul 15, 20222 min read
Continuity: Outgoing = Incoming Seal Numbers
Tip 39: The key to usefulness of alphanumeric seals on a #duisimulator is whether or not the incoming seal number on the subsequent...
4 views0 comments
Stephen Biss
Jun 17, 20224 min read
COBRA V and Hospital Change of Location
Warning: This blog entry was written prior to Bill C-46 during an era when forensic science in Ontario was more transparent. Prior to R....
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Stephen Biss
Jun 10, 20223 min read
Is it safe to assume that the target value of the alcohol standard was 100?
The video below displays a variety of alcohol standards that could be used in a #duisimulator for evidentiary breath testing for...
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Stephen Biss
May 28, 20224 min read
Continuity of the Alcohol Standard
Tip 34: The use of an alcohol standard during evidentiary breath testing in Canada was not mentioned in the Criminal Code as a condition...
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Stephen Biss
May 20, 20228 min read
Cross-examination of solution change QT using COBRA
There are three conditions precedent to the Crown's use of the "conclusive proof" presumption in secton 320.31(1) of the Criminal Code of...
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Stephen Biss
May 15, 20225 min read
Cross-examination of Solution Change QT on Standard Operating Procedures (SOPs)
The cross-examination example below, is of a very, very, experienced and respected qualified technician. Notwithstanding his training and...
34 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...
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Stephen Biss
Feb 14, 20203 min read
Simulator is necessary "Accessory Equipment" that requires inspection and re-calibration
A wet-bath simulator is "accessory equipment" according to the ATC Best Practices document. A wet-bath simulator requires annual...
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Stephen Biss
Feb 19, 20185 min read
Applying Magna Carta and the Concept of the Measurement Standard - the Etalon
Purpose: To connect the concept of measurement standard, reference standard, étalon to Canadian law, Canadian constitutional law, and...
70 views0 comments
Stephen Biss
Feb 10, 20187 min read
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...
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Stephen Biss
Feb 7, 20184 min read
Use of Wet-bath Simulator in Winter Cold Temperatures
Purpose: To cross-examine a CFS scientist on use of Guth 2100 wet-bath simulator under Canadian cold operating conditions To build a case...
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Stephen Biss
Jan 22, 20186 min read
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...
6 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
Stephen Biss
Jan 16, 20185 min read
International Std OIML R126 Mandates Maximum Permissible Error
Sample Cross-examination of CFS expert on OIML standard R126 (2012) respecting maximum permissible error in evidentiary breath...
114 views0 comments
Stephen Biss
Jan 15, 20186 min read
No Supervision by ATC, CFS, or Anyone of Annual/Periodic Inspection SOPs
Purpose: To show that the ATC recommendations for operational procedures at time of use do not account for the need during inspections to...
17 views0 comments
Stephen Biss
Jan 15, 201813 min read
Is an Approved Instrument Really a Screening Device?
Purpose: To suggest that an AI is a quantitative analysis instrument and an ASD is a qualitative analysis instrument and suggest that the...
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