Stephen BissDec 21, 20226 minContinuity of Alcohol Standard Solution: Keep from FreezingMany years ago I asked for timely disclosure/production of a representative bottle of the alcohol standard lot used during the breath...
Stephen BissDec 8, 20226 minWhat 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...
Stephen BissNov 30, 20228 minReliability: Ambient ConditionsTip 41: Changing breath room ambient conditions can reduce "system calibration check" and "system blank test" reliability. Any...
Stephen BissNov 23, 20224 minAncient Egypt and DUI MetrologyIf you served wine or beer at a pub in ancient Egypt the beverages were measured out using liquid volume instruments like these. Each...