Experiments respecting effects of radio frequency interference on Intoxilyzer 5000 64 series upgraded to 66 series. Intoxilyzer in need of maintenance. Nokia 3500 cell phone purchased at Walmart June 2009 used to make calls during various Intoxilyzer 5000 sequences. ACABA mode, 100 alcohol standard. When RFI applied during first Air Blank often results in “Ambient Failed”. When applied during first or second flying wings Internal Checks often results in “Unstable Reference”. When applied during subject test sequence often results in high readings. Breath subject is alcohol free at all relevant times. Intoxilyzer® is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an “approved instrument” in Canada.
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so does it only throw out the reading when the cell phone rings, or did you try just having the cell phone in close proximity?
The experiment was for the purpose of determining if RFI from a cell phone would 1) be detected by the instrument as RFI, trigger an RFI Inhibit flag, and shut the instrument down and 2) be compromised in its reliability by cell phone radio frequency interference. It is apparent that some cell phones, when transmitting, compromise the reliability of some Intoxilyzer results without triggering an RFI Inhibit flag. Police need to preclude cell phone use in police stations.
I think you would see the accused with his cell phone, making a call with his ear against the back of the machine…lol. Lame defence.