This video explains the purpose of the Auxiliary Controller and Supplemental Flow units, and provides step-by-step instructions on how to connect and configure them for the purpose of providing additional push or pull flow.  This is required if you will be using the Cascade Impactor, Inline Gravimetric Filter, Palas Dry Powder generator, ADI Gas Analyzer, and other third-party configurations.  

Next video:  https://support.datasci.com/hc/en-us/articles/360051909613-Inhalation-Tower-Video-18-Supplemental-Flow-Configuration-in-FinePointe