What should be ensured before using the Intoxilyzer 9000?

Before using the Intoxilyzer 9000, it is crucial to ensure that the device is properly calibrated. Calibration ensures that the device is accurately measuring blood alcohol content (BAC) and providing reliable results. An improperly calibrated device can lead to erroneous readings, which could impact legal proceedings or the validity of the test results. Regular calibration against known standards is a critical part of maintaining the device's accuracy and credibility.

While other factors such as battery life and operational status are important, the foundation of the device's functionality lies in its calibration. A device can be powered on and have sufficient battery life, but if it is not properly calibrated, the readings will not be trustworthy. Thus, ensuring that the Intoxilyzer 9000 is calibrated correctly is the most vital step before use.