What is Differential Voltage Monitoring (DVM) ?
Many years ago Ontario defence lawyers cross-examined breath techs on "how much room there was" on the particular Intoxilyzer 5000C to...
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Stephen Biss
- Nov 30, 2022
- 8 min
Reliability: Ambient Conditions
Tip 41: Changing breath room ambient conditions can reduce "system calibration check" and "system blank test" reliability. Any...
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Stephen Biss
- Nov 23, 2022
- 4 min
Ancient Egypt and DUI Metrology
If you served wine or beer at a pub in ancient Egypt the beverages were measured out using liquid volume instruments like these. Each...
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Stephen Biss
- Nov 18, 2022
- 3 min
Study the Block Diagram in the Wet-Bath Simulator Manufacturer's Manual
Tip 25: Obtain a copy of the Guth Laboratories, Inc. wet-bath "Model 2100 Simulator Operation Manual" and study the "Model 2100-Block...
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Stephen Biss
- Nov 10, 2022
- 2 min
Calibration Check on Periodic Inspection of Wet-bath Simulator
Tip 27: Does the Inspector use a traceable reference thermometer, that is accurate and precise, to at least two decimal places, to...
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Stephen Biss
- Nov 3, 2022
- 3 min
Continuity of Alcohol Standard: CalGuard Feature
Tip 40: Some police services take the position that they don't need to use seals between the simulator housing and the jar. Failure to...
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Stephen Biss
- Oct 19, 2022
- 7 min
Error in Facts - "Impaired Driving and Other Criminal Code Driving Offences", Jokinen and Keen
Does partial automation of error-checking in an approved instrument: specifically diagnostics tests, air blanks, cal. checks, and maximum...
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Stephen Biss
- Oct 15, 2022
- 4 min
Continuity: From the Box
Tip 37: Defence lawyers need to study the video - does the qualified technician take a random (unrelated to the matter before the Court)...
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Stephen Biss
- Oct 12, 2022
- 4 min
Change of Response at One Point but Not at Another Point that is Equivalent
Purpose: To suggest that there is empirical evidence in the matter before the Court of change in response by the approved instrument at...
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Stephen Biss
- Oct 3, 2022
- 2 min
Continuity: Use of a Seal
Tip 38: One of the best ways to control wet-bath simulator alcohol standard continuity is to use alphanumeric police seals and record...
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Stephen Biss
- Sep 30, 2022
- 1 min
Continuity: Whiteboard or blackboard method
Tip 36: Some police detachments have been known to write the manufacturer name, lot number, name/badge of solution change officer,...
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Stephen Biss
- Sep 26, 2022
- 2 min
What is Purge Fail on an Intoxilyzer ?
What is a Purge Fail on an Intoxilyzer 8000C ? What is a Purge File on an Intoxilyzer 5000C ? How does this phenomenon affect reliability...
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Stephen Biss
- Sep 16, 2022
- 2 min
Appendix E: Location & Anecdotal Notes in Log
Tip 30: The CFS 8000C Training Aid of 2013 at page 191 of 238, Appendix "E" recommends that the Alcohol Standard Log, updated by the...
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Stephen Biss
- Sep 9, 2022
- 1 min
Anecdotal Notes in Alcohol Standard Log
Tip 29: Obtain disclosure, of the full #duisimulator alcohol standard log, to search for anecdotal notes of difficulties experienced by...
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Stephen Biss
- Sep 2, 2022
- 2 min
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, 2022
- 2 min
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, 2022
- 2 min
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...
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Stephen Biss
- Jul 15, 2022
- 2 min
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...
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Stephen Biss
- Jun 17, 2022
- 4 min
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, 2022
- 3 min
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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