The State of Florida requires very strict maintenance and calibration of all breath test instruments. Commonly, the Intoxilizer 8000 is used throughout the state of Florida. This instrument requires monthly and yearly inspections and calibration by an agency inspector. Errors and anomalies encountered during testing are recorded. An example of an error that the Breath Test machine can record would be a Slope Not Met. Slope Not Met refers to the lack of a constant sample being breathed into the machine. For example, if the person giving a sample has mouth alcohol at the time of the test, or has not been subject to a 20 minute observation period where a certified Breath Test operator observes for regurgitation and to be sure that the donor does not ingest anything, mouth alcohol may not have dissipated. If mouth alcohol is present the sample will initially contain a high amount of alcohol, but as the subject blows into the instrument, forcing fresh lung air into the machine, the intoxilizer should provide an error message, “Slope Not Met”.