What does the message "Range exceeded" indicate?

The message "Range exceeded" indicates that the subject has a blood alcohol concentration that exceeds the maximum measurement limit of the Intoxilyzer 8000 device, which is typically 0.6 grams per liter (g/L) or sometimes expressed as 0.6 alcohol concentration (AC) in breath. When the device encounters a sample that is above this threshold, it cannot process the result accurately and instead displays the "Range exceeded" message. This serves as a caution to inform the operator that the reading is outside the operational limits of the device, suggesting that the individual has a significantly high breath alcohol concentration, warranting further investigation or alternative testing methods.

Other options diverge from this context; for instance, a very low breath alcohol concentration would not trigger this message, nor would software updates or sample validity concerns be related to exceeding the measurement range.