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The sampling system for the NHTSA-approved Intoximeters Alcomonitor CC used in DOT testing is designed to take an automatic sample once several parameters have been met. The instrument monitors the breath sample as it is being provided.
- A flow rate of at least .2 liters of breath per second must be detected. A “+” is displayed on the instrument to indicate that this condition has been met. Once the “+” has been displayed, the instrument begins to measure the total breath volume of the provided sample.
- A minimum sample volume of 1200 cc is required for an automatic sample to occur. The instrument indicates the minimum volume requirement has been met by displaying “++”. A steady flow of breath is required for the period between the indication of minimum flow (+) and the indication of minimum volume requirement (++).
- Once the minimum volume requirement has been met and the subject’s breath flow begins to taper off, a breath sample will be captured for analysis.
In the event that these requirements are not met, the instrument aborts the attempted sample and allows one more attempt from the subject before aborting the test sequence.
AMCC is not detecting an appropriate flow of gas from the standard. Check to see if the gas tank is connected and if it has pressure. Next run an Accuracy Check and listen for flowing gas. If you have pressure and are unable to hear the flowing gas call Technical Services at 314-429-4000.
There are two possibilities:
- A routine accuracy check was not performed at the appropriate time. If the check did not occur, an accuracy check must be performed before subject testing can resume.
If there is a failed accuracy check, the device must be taken out of service until re-calibrated and checked by a properly certified Calibration Technician.
According to the U.S. DOT regulations (link below), unless you are properly trained and authorized to perform calibrations, you cannot place the instrument back into service. Contact Technical Services at 314-429-4000 for further assistance.
Intoximeters, Inc. does not claim to be an expert on infectious disease transmission, but it has developed two guides (Infection Control Cleaning and Disinfecting Intoximeters Handheld Instruments and Infection Control Cleaning and Disinfecting an Intoximeters Desktop Instrument) that list some of the concerns and commonsense steps that can be taken to reduce the likelihood of disease transmission while performing a breath alcohol test or while cleaning or disinfecting an Intoximeters, Inc. alcohol breath test instrument.
Additional information and directives on Coronavirus can be found through OSHA (3990-03 2020) or the CDC. The CDC has put out documentation for the maintenance on other types of breathing related equipment such as spirometers that may have helpful information on infections control measures.
