Patent ID: 7403862
Filing Date: 2008-07-22
Classification: G01F

Abstract:
1. A method of operating a process measuring device including a measuring tube inserted in a line conducting a medium, the method comprising the steps of: causing the medium to flow through the measuring tube; causing an electrical excitation current to flow through an operating circuit of the process measuring device to drive an excitation arrangement arranged on the measuring tube, and using the excitation arrangement to act on the measuring tube and/or on the medium flowing therethrough; using a sensor arrangement arranged on the measuring tube to produce at least one measurement signal corresponding to the physical, measured variable; digitizing at least a portion of the measurement signal and storing, within a data memory provided in the process measuring device, said at least one segment of said digitized measurement signal to generate a digital sampling sequence representative of a waveform of the measurement signal; detecting an anomaly in the waveform of the measurement signal caused at least in part by an interfering potential contained in the measurement signal; providing artificially generated digital data; extracting data belonging to said anomaly in the waveform and using said artificially generated digital data for generating an interference-free waveform of the measurement signal; and using said interference-free waveform of the measurement signal to determine a measured value representative of a physical variable of the flowing medium.