What does "baseline setup" mean and why is it necessary for SpiroHome Personal?

Before each test, the SpiroHome Personal device will ask you to stabilize your device (by placing it on a flat surface) and block airflow through it, until the baseline setup process is completed. In this step, the device is looking for any environmental airflows that may present and potentially influence your spirometry results. The completion of this step is critical to ensuring the accuracy of test results.