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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


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...
Stephen Biss
May 16, 20188 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...
Stephen Biss
Mar 28, 20185 min read


Heater Response Time on Guth 2100
Purpose: To further challenge the Crown's suggestion that the anomalous low cal. checks that occurred in this breath truck were not...
Stephen Biss
Feb 9, 20187 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...
Stephen Biss
Feb 7, 20184 min read


Wet-bath Simulators Manufacturer Specs
Purpose: To obtain an admission from a CFS scientist that expectation of ATC Best Practices Recommendation is for annual inspection of...
Stephen Biss
Feb 6, 20184 min read


Being Intolerant Depends on Humans not the Machine
Purpose: To challenge the Crown's assertion that the AI will automatically shut down if anything is out of tolerance or ATC or...
Stephen Biss
Jan 23, 20182 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...
Stephen Biss
Jan 22, 20186 min read
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