This experiment shows that RFI in the breath room can change BAC indications on the display of an evidentiary breath instrument without triggering an RFI Interference error message. The "faraday cage" steel case of the instrument did not prevent the RFI from penetrating the instrument.

Intoxilyzer 5000 in need of maintenance. Instrument in ABA (Using EscEsc B) and ACABA mode. Print inhibit on. 100 alcohol standard at 34.0C . RFI applied at various positions at back of instrument during B in sequence. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. Intoxilyzer® is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an "approved instrument" in Canada.

This is another experiment that shows that RFI in the breath room can change BAC indications on the display of an evidentiary breath instrument without triggering an RFI Interference error message. The "faraday cage" steel case of the instrument did not prevent the RFI from penetrating the instrument.

Intoxilyzer 5000 in need of maintenance. Instrument in ABA (Using EscEsc B) and ACABA mode. Print inhibit on. 100 alcohol standard at 34.0C . RFI applied at various positions at back of instrument during B in sequence. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. Intoxilyzer® is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an "approved instrument" in Canada.

Please note that this instrument twice erroneously displayed an "INVALID SAMPLE" (mouth alcohol detection) error message as a result of RFI but did not display an "RFI interference" error message. On other occasions, the instrument erroneously displayed a BAC analysis with no "RFI Interference" error message.

Subject with zero BAC. Intoxilyzer 5000 in need of maintenance. Instrument in ABA (Using EscEsc B) and ACABA mode. Print inhibit on. 100 alcohol standard at 34.0C . RFI applied at various positions at back of instrument during B in sequence. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. Intoxilyzer® is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an "approved instrument" in Canada.

This is an example of RFI causing erroneous BAC analysis indications on an evidentiary test instrument without triggering an "RFI Interference" error message. Please notice the "purge fail" phenomenon when the instrument cannot clear the 029 result (zero has been reset too low by the RFI).

Intoxilyzer 5000 in need of maintenance. Intoxilyzer® is a registered trademark of CMI, Inc. Instrument in ACACACACACA mode. Print inhibit on. No simulator, no source of ethanol or interferent. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. The Intoxilyzer® 5000C is an "approved instrument" in Canada.

This experiment shows that RFI can cause many different erroneous error messages and BAC results without triggering the correct error message which should be "RFI interference". Note the "purge fail" when the air blank won't clear.

Intoxilyzer 5000 in need of maintenance. Instrument in ACACACACACA mode. Print inhibit on. No simulator, no source of ethanol or interferent. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. Intoxilyzer® is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an "approved instrument" in Canada.

This is another example of zero, as set by the instrument, being compromised by RFI. There is no "RFI Interference" error message and yet there are cal. check results (with no source of ethyl alcohol). Note the "purge fail" caused by zero being set at about -.024 to -.029. A zero air blank therefore reads as 024-029.

Intoxilyzer 5000 in need of maintenance. Intoxilyzer® is a registered trademark of CMI, Inc. Instrument in ACACACACACA mode. Print inhibit on. No simulator, no source of ethanol or interferent. RFI from two Cobra walkie-talkies Channel 3 00 used, one transmitting, another receiving, so you can hear when "Talk" is pressed. The Intoxilyzer® 5000C is an "approved instrument" in Canada. RFI during air blank and internal standards generates phantom ethanol during cal. check.

Subject test .034 with no alcohol in subject's body as a result of Nokia mobile phone call received. Note cal. check .096 and clear diagnostics test printed.

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.

In this particular example, subject blows .530 at 2:03 in video with no alcohol in subject's body. See also .253 at 4:19.

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.

Subject with no alcohol blowing .700, i.e. beyond the range possible on the evidentiary test instrument. A "Range Exceeded" error message results. There was no RFI error message.

Mississauga Toronto Ontario lawyer Stephen R. Biss speaks about the effect of cell phones on the reliability of the evidentiary breath instruments used in Ontario Canada. Radio frequency interference from a transmitting Nokia 3500 cell phone causes an apparent blood alcohol concentration beyond 700 mg/100mls on an Intoxilyzer 5000 64 series product number 564 CA model similar to the Intoxilyzer 5000C used peviously by police in Ontario Canada. Police in Ontario now use the Intoxilyzer 8000C.

False "Ambient Fail" error message generated by RFI.

Intoxilyzer 5000 in need of maintenance. When subjected to cell phone radio frequency interference during the first air blank, this particular instrument, in need of maintenance, interpreted RFI as ambient alcohol in the room air.

This is an example of what is supposed to happen: An "Inhibited RFI" error message is triggered when RFI applied. The Instrument is an Intoxilyzer 5000EN.

The Intoxilyzer 5000C is an "approved instrument" in Canada. The Intoxilyzer 5000EN is two generations beyond the Intoxilyzer 5000C.

This is an example of a false Error Message. The instrument indicates "Interferent" i.e. a chemical interferent when the cause is radio frequency interference (RFI). Error messages are not always reliable to identify the correct error.

ACACA calibration checks using 100 solution, first cal. check 102, second cal. check indicates "Interferent" then 106 when exposed to cell phone RFI

An "Invalid Sample" error message can be triggered by Cell Phone RFI. Error messages are not always reliable to indicate the true cause of the error.

Radio frequency interference can cause a "Range Exceeded" error message on an approved instrument.

Range exceeded error caused by RFI

The Intoxilyzer® 5000C is an "approved instrument" in Canada. TheIntoxilyzer® 5000EN is two generations beyond the Intoxilyzer® 5000C.

The Intoxilyzer 5000C is an "approved instrument" in Canada. The Intoxilyzer 5000EN is two generations beyond the Intoxilyzer 5000C.

The Intoxilyzer® 5000C is an approved instrument in Canada. The IIntoxilyzer® 5000 66 series is one generation beyond the 5000C which is a 64 series. Instrument subjected to cell phone transmission during cal. check and during subject test results in BAC o

The Intoxilyzer® 5000C is an "approved instrument" in Canada. The Intoxilyzer® 5000EN is two generations beyond the Intoxilyzer® 5000C. Instrument accepts sample and generates test card showintg a BAC of 12 mg/100mls from subject with 0 mg/100mls BAC. The

The Intoxilyzer® 5000C is an "approved instrument" in Canada. Cell phone transmission triggers Unstable reference flag.

Do cell phones that are receiving only, not transmitting, cause radio frequency interference to scientific instruments such as evidentiary breath testing equipment? An Intoxilyzer 5000 in need of maintenance is used to conduct an ACABA breath test using a

Does receiving a text message in a breath room interfere with calibration checks conducted by a breath alcohol technician before and during evidentiary breath testing? Nokia 3500 cell phone receives text messages during calibration checks. Using 100 solut

If a text message is received by an idle cell phone in a breath room, could it affect Intoxilyzer results? This video suggests that there needs to be more study on this issue since clearly in this video a subject with 000 BAC managed to blow 122 mg/100mls