Abstract: A Coriolis mass flowmeter (1) having at least one sensor arrangement (2), at least one transducer (3) and at least one housing (4), wherein the sensor arrangement (2) has at least one measuring tube (5) that can be excited to oscillation, at least one oscillation generator (6) and at least one oscillation sensor (7), wherein the transducer (3) at least in part has evaluation and power electronics for controlling and measurement evaluation of the sensor arrangement, wherein the sensor arrangement (2) and the transducer (3) are arranged adjacent to one another in a common volume defined by the housing (4). A Coriolis mass flowmeter of the described type, in which the physical interaction between the sensor arrangement and transducer is reduced, is realized by the provision of a thermal barrier (8) arranged at least in a space between the sensor arrangement (2) and the transducer (3).

Abstract: A method for operating a resonance measuring system, in particular a Coriolis mass flowmeter, an oscillation element is excited to oscillation and the oscillations of the oscillation element are detected by an oscillation sensor and are formed as at least one response signal of a respective eigenform. Orthogonal projection components of the response signal are created, at least a first value corresponding to an eigenfrequency of the resonance measuring system is determined with at least a part of the alternating components of the projection components, at least a second value corresponding to the eigenfrequency of the resonance measuring system is determined with at least a part of the constant components of the projection components and the first and the second value correspondents are used for exciting the resonance measuring system with at least one control in at least one control loop in the eigenform corresponding to the eigenfrequency.

Abstract: A method for operating a resonance-measuring system, in particular, a Coriolis mass flowmeter, having at least one oscillation element, at least one oscillation driver and at least one oscillation sensor, the oscillation element being excited to oscillation in at least one control using at least one control loop by at least one oscillation driver being excited by at least one excitation signal and the excited oscillations of the oscillation element being detected by the oscillation sensors as at least one response signal. At least one set variable of the closed loop is varied in a pre-determined manner and by evaluating at least one resulting excitation signal and/or at least one resulting response signal with the help of a mathematical model of the resonance-measuring system, at least one parameter of the excited eigenform is selectively identified.

Abstract: A process for operating a Coriolis mass flow rate measurement device which has at least one measurement tube, the measurement tube being excited into vibrations with a predetermined excitation frequency and a predetermined excitation phase. The response phase which is achieved thereby and the rate of change of the response phase are detected and the excitation frequency is changed by the frequency amount which arises based on a predetermined function from the detected rate of change of the response phase. This makes it possible to maintain continuous measurement of the mass rate of flow even if two-phase flows occur.

Abstract: A method for operating a mass flowmeter that employs the Coriolis principle and through which flows a medium, wherein the mass flowmeter incorporates a measuring tube that can be stimulated to oscillate, the measuring tube is stimulated to oscillate at a minimum of two mutually different frequencies and/or in at least two mutually different natural oscillating modes, and the resulting oscillations of the measuring tube are recorded. The density of the medium flowing through the measuring tube is determined by evaluating the acquired oscillations of the measuring tube on the basis of a physical-mathematical model for the dynamics of the mass flowmeter. In this fashion, highly accurate measurements are obtained for determining the density of the medium flowing through the measuring tube.

Abstract: A process for operating a Coriolis mass flow rate measurement device which has at least one measurement tube, the measurement tube being excited into vibrations with a predetermined excitation frequency and a predetermined excitation phase. The response phase which is achieved thereby and the rate of change of the response phase are detected and the excitation frequency is changed by the frequency amount which arises by means of a predetermined function from the detected rate of change of the response phase. This makes it possible to maintain continuous measurement of the mass rate of flow even if two-phase flows occur.

Abstract: A method for operating a mass flowmeter that employs the Coriolis principle and through which flows a medium, the flowmeter including a measuring tube through which passes a medium, which measuring tube is stimulated into oscillating and the resulting oscillatory response of the measuring tube is measured includes the step of gauging the pressure of the medium flowing through the measuring tube by evaluating the collected oscillatory response on the basis of a physical-mathematical model for the dynamics of the mass flowmeter. Thus, without requiring any additional devices, it is possible for a Coriolis mass flowmeter, apart from measuring the mass flow, to also measure the pressure in the measuring tube.

Abstract: A method for operating a Coriolis mass flowmeter incorporates a measuring tube through which flows a medium and which is stimulated into oscillating at a minimum of one frequency, the resulting oscillations of the measuring tube being detected and measured. The viscosity of the medium flowing through the measuring tube is determined as a function of the pressure drop along the measuring tube, thus permitting a precise determination of the viscosity in simple and reliable fashion.

Abstract: A method for operating a mass flowmeter that employs the Coriolis principle and through which flows a medium, the flowmeter including a measuring tube through which passes a medium, which measuring tube is stimulated into oscillating and the resulting oscillatory response of the measuring tube is measured includes the step of gauging the pressure of the medium flowing through the measuring tube by evaluating the collected oscillatory response on the basis of a physical-mathematical model for the dynamics of the mass flowmeter. Thus, without requiring any additional devices, it is possible for a Coriolis mass flowmeter, apart from measuring the mass flow, to also measure the pressure in the measuring tube.

Abstract: A method for operating a Coriolis mass flowmeter incorporates a measuring tube through which flows a medium and which is stimulated into oscillating at a minimum of one frequency, the resulting oscillations of the measuring tube being detected and measured. The viscosity of the medium flowing through the measuring tube is determined as a function of the pressure drop along the measuring tube, thus permitting a precise determination of the viscosity in simple and reliable fashion.

Abstract: A method for operating a mass flowmeter that employs the Coriolis principle and through which flows a medium, wherein the mass flowmeter incorporates a measuring tube that can be stimulated to oscillate, the measuring tube is stimulated to oscillate at a minimum of two mutually different frequencies and/or in at least two mutually different natural oscillating modes, and the resulting oscillations of the measuring tube are recorded. The density of the medium flowing through the measuring tube is determined by evaluating the acquired oscillations of the measuring tube on the basis of a physical-mathematical model for the dynamics of the mass flowmeter. In this fashion, highly accurate measurements are obtained for determining the density of the medium flowing through the measuring tube.