US 12,392,649 B2
Method for putting a Coriolis flow meter into operation
Ennio Bitto, Aesch (CH); Martin Josef Anklin, Dornach (CH); and Benjamin Schwenter, Ettingen (CH)
Assigned to Endress+Hauser Flowtec AG, Reinach (CH)
Appl. No. 17/997,888
Filed by Endress+Hauser Flowtec AG, Reinach (CH)
PCT Filed Apr. 19, 2021, PCT No. PCT/EP2021/060047
§ 371(c)(1), (2) Date Nov. 3, 2022,
PCT Pub. No. WO2021/223989, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 10 2020 112 154.7 (DE), filed on May 5, 2020.
Prior Publication US 2023/0221157 A1, Jul. 13, 2023
Int. Cl. G01F 1/84 (2006.01); G01N 9/32 (2006.01); G01N 11/04 (2006.01)
CPC G01F 1/8431 (2013.01) [G01F 1/8422 (2013.01); G01F 1/8427 (2013.01); G01F 1/8477 (2013.01); G01N 9/32 (2013.01); G01N 11/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for commissioning a Coriolis flow meter for operation, wherein the Coriolis flow meter comprises:
a measuring tube arrangement, wherein the measuring tube arrangement comprises at least one measuring tube through which a medium can flow;
at least one vibration exciter comprising an excitation magnet and an excitation coil and configured to excite the measuring tube arrangement to vibrate, wherein the excitation magnet is disposed on the at least one measuring tube;
at least one vibration sensor comprising a sensor magnet and a sensor coil and configured to detect vibrations of the at least one measuring tube, wherein the sensor magnet is attached to the measuring tube arrangement;
a carrier device comprising a receiving device, the sensor coil of the at least one vibration sensor and the excitation coil of the at least one vibration exciter, wherein the receiving device includes a receptacle, and wherein the receiving device is configured such that the measuring tube arrangement can be arranged at least partially in the receptacle of the receiving device and can be mechanically detachably connected to the carrier device;
an operating circuit configured to communicate with the at least one vibration exciter and to operate the excitation coil via at least one excitation signal, which includes an excitation current;
a measuring circuit disposed in the carrier device, the measuring circuit configured to communicate with the at least one vibration sensor and to determine at least one vibration signal via the at least one vibration sensor;
an evaluation circuit configured to communicate with the measuring circuit and to determine and provide mass flow rate measurement values, viscosity values and/or density measurement values, and/or values of a variable derived therefrom, based at least on the at least one vibration signal or on a variable derived from the at least one vibration signal,
the method comprising:
inserting the measuring tube arrangement into the receptacle of the carrier device;
causing the at least one measuring tube to vibrate via the at least one excitation signal supplied to the at least one vibration exciter as provided by the operating circuit;
determining a measurement value of a state variable;
determining whether the at least one measuring tube in the carrier device is in a steady state based on whether a difference between the measurement value of the state variable and a reference value of a reference variable is below an upper limit value and exceeds a lower limit value, wherein the reference value of the reference variable is determined in a preceding adjustment operation of the measuring tube arrangement;
determining a mass flow rate measurement value; and
commissioning the flow meter by:
when the at least one measuring tube in the carrier device is determined to be in the steady state, setting the determined mass flow rate measurement value as a mass flow rate zero point in the evaluation circuit; or
when the at least one measuring tube in the carrier device is determined to be not in the steady state, setting a mass flow rate zero point determined in the preceding adjustment operation as the mass flow rate zero point in the evaluation circuit.