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Dayton DUI Law: Explaining Error Messages and Their Importance

Dayton DUI Attorney Charles Rowland > DUI Law  > DUI Process  > Dayton DUI Law: Explaining Error Messages and Their Importance

Dayton DUI Law: Explaining Error Messages and Their Importance

Ohio utilizes the BAC DataMaster breath test machine to measure the blood alcohol content of a suspect arrested for driving under the influence. The BAC DataMaster is a product of National Patent Analytical Systems, Inc. (NPAS) located in Mansfield, Ohio.  National Patent Analytical Systems has certified Charles Rowland in the operation, diagnostic verification and calibration of the BAC DataMaster Breath Alcohol Testing Instrument, the most commonly used breath testing instrument in Ohio for DUI arrests.  The BAC DataMaster breath test device requires regular maintenance, and a proper environment for testing administration. The BAC DataMaster is part computer, and uses an LED display. If the alcohol detecting machine is not functioning properly or if the testing environment is corrupted, then the BAC DataMaster will report an error message. Below is a partial list of these messages that occur on a regular basis.

  1. Ambient Failure: The machine is unable to purge itself. The machine operator is required to check the testing room for excessive odors of alcohol or chemical odors. The operator must ensure the breath test tube is warm, and that the tube is not placed near the machine’s exit port.
  2. System Will Not Zero: The operator must ensure the breath test tube is warm and is not placed near the machine’s exit port.
  3. Invalid Sample: This warning is triggered by the presence of mouth alcohol or the instrument is out of adjustment. The operator must conduct another mouth check and wait for the prescribed 15 minutes.  Frequently, an operator will interpret an invalid sample reading as caused by a defendant who is improperly blowing into the machine.  This is important because if the officer marks an invalid sample as a refusal, the defendant can expect increased license suspension time and other detrimental outcomes.  See Dayton DUI Defense: What is the Invalid Sample Reading?
  4. Radio Interference: RFI is being detected by the BAC DataMaster. The operator of the machine must determine the cause of the RFI and eliminate the source.
  5. Printer Error: The BAC DataMaster will print a breath ticket showing the breath test results. The Printer Error indicates a paper jam or print malfunction.
  6. Calibration Error: These machines require calibration and this error indicates the calibration could not be verified. If the error messages persist, then the operator must tag the machine “out of service” and not conduct further tests until it has been serviced.

“I have been trained in the science underlying the breath test and I trust it,” says Dayton DUI lawyer Charles M. Rowland.  “The machine can malfunction and its vital that your attorney be able to correctly interpret what the error messages mean.  These machines have room for error and give experienced DUI defense attorneys plenty to argue before a judge and jury.”  If you have been arrested for an Ohio DUI then you mustcontact a leading Dayton DUI attorney who can best protect your legal interests.  Contact Charles Rowland by phone at 937-318-1DUI (937-318-1384), 937-879-9542, or toll-free at 1-888-ROWLAND (1-888-769-5263).  For after-hours help contact our 24/7 DUI HOTLINE at 937-776-2671.

Visit www.DaytonDUI.comwww.SpringfieldDUI.com,www.OhioDUIdefense.comwww.KetteringDUI.com,www.BeavercreekDUI.com, www.FairbornDUI.com,   www.VandaliaDUI.com,www.HuberHeightsDUI.comwww.MiamisburgDUI.comwww.XeniaDUI.com orwww.CharlesRowland.com.  Immediate help is available by filling out the CONTACT form on any of these pages.  For information about Dayton DUI sent directly to your mobile device, text DaytonDUI (one word) to 50500.  Follow DaytonDUI on Twitter at www.Twitter.com/DaytonDUI or Get Twitterupdates via SMS by texting follow DaytonDUI to 40404. DaytonDUI is also available on Facebook and you can access updates by becoming a fan of Dayton DUI/OVI Defense.  You can also email Charles Rowland at: CharlesRowland@CharlesRowland.com or write to us at 2190 Gateway Dr., Fairborn, Ohio 45324.

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Charles Rowland


Charles M. Rowland II has been representing the accused drunk driver for over 20 years. Contact him at (937) 318-1384 if you find yourself facing a DUI (now called OVI) charge.

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