Device for Compensating Viscosity-Induced Measurement Errors, for Coriolis Flow Measurement

Abstract

Embodiments of a device for compensating viscosity-induced measurement errors, for Coriolis flow measurement, employ a measuring transformer and a meter electronic unit.

Claims

1. A device for compensating viscosity-induced measurement errors, for Coriolis flow measurement, comprising: a) a measuring transformer, wherein the measuring transformer has a measuring tube intended to be flowed through by a fluid, a vibration generator for generating measurement signals in the form of mechanical vibrations at the measuring tube and vibration sensors for sensing the vibrations of the measuring tube, and b) a meter electronic unit, wherein the meter electronic unit is configured so as to determine a measured value for at least one desired measured variable from measurement signals transmitted from the measuring transformer to the meter electronic unit, wherein c) the meter electronic unit has an input interface (1) for inputting at least one viscosity value of the fluid.

2. The device according to claim 1, wherein the input interface is configured so as to input the at least one viscosity value as a mathematical function.

3. The device according to claim 1, wherein the input interface is a manual input interface.

4. The device according to claim 1, wherein the input interface is configured so as to obtain the at least one viscosity value from an apparatus outside the device in a wireless or wired manner.

5. The device according claim 1, wherein the meter electronic unit is configured so as to process the at least one viscosity value or a correction value derived from the at least one viscosity value in order to correct the measured variable.

6. The device according claim 1, wherein the measured variable or one of the measured variables is a mass flow of the fluid.

7. The device according claim 1, wherein the meter electronic unit has a storage apparatus, wherein the storage apparatus is configured so as to store a table or a characteristic diagram, wherein the table or the characteristic diagram contains viscosity values of the fluid depending on at least one further variable, in particular on at least one of the variables temperature, pressure and flow velocity.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1: shows an input interface unit for measuring the Coriolis mass flow before inputting of a viscosity value, and

[0029] FIG. 2: shows the input interface unit according to FIG. 1 after inputting of a viscosity value.

DETAILED DESCRIPTION

[0030] FIG. 1 shows an input interface unit 1 having a display unit 2, an input field 3, a foot 4, used for attachment to an apparatus that is not illustrated here, and a first connection element 5 and a second connection element 6 for the connection of electric supply lines, signal lines or other elements, which are not illustrated here. The input interface unit 1 is used for connection to a device, not illustrated here, for the Coriolis flow measurement of a fluid.

[0031] As illustrated by way of example in FIG. 1, it is able to be selected in the input field whether or not viscosity compensation should be used for the measurement. In the case of viscosity compensation, the influence of the viscosity of the fluid flowing through the measurement device is taken into consideration for the measurement result. To this end, a specific viscosity value, which is taken into consideration for the Coriolis flow measurement, is able to be input via the input field 3. The input interface unit 1 at the same time constitutes the meter electronic unit or forms part thereof. In the first case, the measurement signals may be evaluated in the input interface unit 1 itself. The viscosity value may also however be transmitted to a further part, not illustrated here, of the meter electronic unit for evaluation purposes in a wired or wireless manner.

[0032] As an alternative or in addition to the input field 3, the input interface unit 1 may also be supplied with the viscosity value by other means, such as for example by a further unit via a wired or wireless information transmission path.

LIST OF REFERENCE SIGNS

[0033] 1 Input interface unit

[0034] 2 Display unit

[0035] 3 Input field

[0036] 4 Foot

[0037] 5 Connection element

[0038] 6 Connection element