What should an operator avoid doing during a subject test?

The correct response emphasizes the importance of maintaining the integrity and accuracy of the testing process. During a subject test with the Intoxilyzer 9000, it is critical that the operator does not interfere with the calibration of the machine. Calibration is a procedure that ensures the device provides accurate readings, and it is intended to be performed before testing begins, not during. If calibration is attempted mid-test, it can disrupt the process and lead to inaccurate results, which are essential for legal proceedings and assessments of intoxication levels.

Operators must ensure that the machine is properly calibrated and functioning correctly before initiating the test. This ensures that the results obtained are valid and reliable. Engaging in practices like calibrating during an active test can compromise the results and lead to disputes about the accuracy of the findings. Therefore, maintaining a strictly adherent routine and following the testing protocol without tampering with calibration ensures that the testing results uphold legal and scientific standards.