Airflow measurement station (differential pressure signal) can connect to the controller temporarily to run airflow commissioning to calculate, calibrate, and store four fan speed characteristic curves automatically at damper positions 40%, 60%, 80% and 100%. The controller places the damper to a proper position to meet minimum or any other airflow requests in cfm. You can enable this function only from the mobile app if the related function is available in your current mobile app version.