What is the purpose of the "control sample" in breath testing?

The purpose of the "control sample" in breath testing is to provide a reference point for the accuracy of test results. Control samples are aimed at verifying the performance of the Intoxilyzer's measurement system. By testing control samples with known alcohol concentrations, operators can compare the results obtained from actual subject tests against these reliable benchmarks. This procedure helps ensure that the device is functioning correctly and delivering accurate and reliable readings. It also allows for calibration checks, ensuring that any variations in readings during testing can be detected and accounted for effectively.

While control samples can implicitly support the assessment of the operator's skill level and demonstrate device functionality, their primary role is centered on confirming the accuracy and reliability of the results produced during actual tests.