Patent ID: 7603914

Claim:
The measuring system for registering at least one measured variable of a medium flowing in a process line, said measuring system comprising: an inlet; a measuring transducer including a measuring tube and a sensor arrangement with at least one sensor element reacting to the variable to be registered, said measuring tube serving for conveying the medium to be measured and said measuring tube showing a flow cross section smaller than a supply segment of the process line connected to said inlet of the measuring system, and said measuring transducer providing, by means of the at least one sensor element, at least one measurement signal influenced by said measured variable; measuring electronics communicating with said measuring transducer and producing, at least at times, taking into consideration the at least one measurement signal, at least one measured value instantaneously representing the measured variable; and a flow conditioner arranged at an inlet of said measuring tube, wherein: said flow conditioner mediating between said measuring tube and said supply segment of the process line and showing a lumen, which tapers toward said measuring tube and through which medium flows during operation; said flow conditioner including an inlet end facing said supply segment of the process line and showing a flow cross section, which is greater than the flow cross section of said measuring tube; said flow conditioner including an outlet end facing toward said measuring tube and showing a flow cross section, which is smaller than the flow cross section of the inlet end of said flow conditioner; and said flow conditioner including, at least one inner edge, arranged upstream of its outlet end, which protrudes into said lumen of said flow conditioner and against which medium, conveyed in said flow conditioner, flows during operation, said inner edge bounding a cross section of the lumen of the flow conditioner, said cross section bound by the inner edge being smaller than the flow cross section of the supply segment of the process line; said measuring tube shows an installed length, which is greater than an installed length of the flow conditioner, so that an installed length ratio, defined by a ratio of the installed length of said flow conditioner to the installed length of of said measuring tube, is kept smaller than one; a constriction ratio, defined by a ratio of said cross section bounded by the inner edge to said flow cross section of the supply segment of the process line, is kept smaller than 0.9 and greater than 0.1; and a cross section ratio, defined by a ratio of said flow cross section of the supply segment of the process line to said flow cross section of said measuring tube, is kept greater than 1.5 and smaller than 10.