What does it signify if a BrAC reading exceeds the instrument's analytical range?

When a BrAC reading exceeds the instrument's analytical range, it indicates a "Range Exceeded Warning." This signifies that the concentration of alcohol in the breath sample is higher than what the Intoxilyzer 9000 can accurately measure. Each breath-testing device has a specific range of alcohol concentration that it can process, and readings outside this range suggest that the sample is too high to be quantified appropriately by the instrument.

In practical terms, this warning means that the operator should take caution and consider either retesting the subject after a period of time to allow for a potential decrease in BrAC or use an alternative method for accurate assessment. It reflects the limitations of the device rather than suggesting issues such as mouth alcohol contamination, which would generally result in a different type of error, or implying that the sample is invalid due to calibration concerns. Understanding these readings is essential for administering breath tests accurately and ensuring that results fall within the operational capabilities of the device.