How often should calibration checks be performed on the Intoxilyzer 8000?

Calibration checks for the Intoxilyzer 8000 are critical to ensure the accuracy and reliability of the breath-testing results. Conducting calibration checks before and after each test or every 31 days is a standard practice that helps maintain the instrument's precision. This approach ensures that any potential deviations in measurement accuracy can be identified and corrected immediately, leading to trustworthy results.

It's essential to perform these checks regularly because factors such as environmental conditions, usage frequency, and wear can affect the instrument's function. Therefore, establishing a routine that encompasses both pre-test and post-test calibrations guarantees that the device is performing optimally at all times.

While other options suggest various intervals for calibration checks, they do not meet the frequency needed to maintain the Intoxilyzer 8000's performance standard. Regular calibration as described in the correct option directly contributes to reliable breath alcohol concentration readings, which are crucial for law enforcement and legal proceedings.