method and device for maintaining a desired luftdurchflussmenge by a deduction

摘要

A system 599 for maintaining a desired air flow through a fume hood 14 having a sash 601. The system comprises a mechanism 603 for controlling air flow through the fume hood 14 based on at least one gain. The system 599 is also comprised of a mechanism 500 for automatically tuning the gain connected to the controlling mechanism 603. Additionally, the system is comprised of a mechanism 508 for manually inputting information to the tuning mechanism 500 so the tuning mechanism 500 automatically provides a desired gain to the controlling mechanism 603 based on information received from the input mechanism 508. Additionally, the present invention pertains to a qualitative tuning system 500 for a processor 603. The present invention also pertains to a method for controlling air flow through a fume hood 14 with a sash 601. The method comprises the steps of providing information concerning flow of air through the fume hood 14 to a processor 603. Then, there is the step of manually inputting information concerning gain into a qualitative tuning system 500 connected to the processor 603. Next, there is the step of automatically producing an adjustment to the gain to the processor 603 by the qualitative tuning system 500 based on the information. Then, there is the step of controlling the flow of air through the fume hood 14 with the processor 603 based on the gain it receives from the qualitative tuning system 500. The present invention pertains to a method for qualitatively tuning a processor 603. The present invention additionally pertains to a system 600 for controlling a fume hood 14 having a sash 601 with a face 611. The system 600 is comprised of a mechanism 603 for controlling air flow through the fume hood 14 based on sash 601 position and air flow face velocity. The system 600 also is comprised of a controller 18, remote from the controlling mechanism 599, but in communication with the controlling mechanism 599.