Abstract: A method for processing a sequence of fault messages occurring in a device including many systems, makes it possible to discriminate between fault messages most likely originating from a real system fault and fault messages without any real fault in the associated system (no fault found), characterized in that the method combines: an “air-side” method (100) executed in real time for acquiring fault message data defining sequences stored in a fault database and for immediate diagnosis assistance using a diagnostics tool, and a “ground-side” method (200) for the subsequent analysis of fault sequence data and for improving the diagnostics tool.

Abstract: According to a method to remove dust particles from a stable material web which moves relative to a contact-free operating de-dusting device, a blower unit of the de-dusting device is provided at a specified first distance (d) and a grounded potential surface at a second distance (d) from the surface of the material web. The velocity and the pressure between the surface of the material and the potential surface of the ultrasonic gas flow existing from the blower unit is adjusted so that the product of the pressure and of the second distance (d) according to Paschen's law makes a discharge of the dust particles on the surface of the material feasible relative to the grounded potential surface. Furthermore, the adhesive forces (van der Waals forces) are overcome by the ultrasonic gas flow.