公开(公告)号：US20190003875A1

公开(公告)日：2019-01-03

申请号：US16061812

申请日：2016-11-15

Applicant: Endress + Hauser Flowtec AG

Inventor： Stephan Natter ,  Ton Leenhoven ,  Paul Ceglia ,  Martin Josef Anklin

IPC: G01F25/00 ,  G01F1/84 ,  G01F15/02

Abstract: A method for ascertaining a Reynolds number compensated flow velocity and/or a Reynolds number compensated flow (G) by a Coriolis flow measuring device, comprising steps as follows: a. ascertaining at least one meter factor (C) during a calibration time interval in a calibration plant (a) based on measured values (A and B) of the Coriolis flow measuring device and a piston test apparatus of the calibration plant (a) by an evaluation unit of the calibration plant (a); b. transmitting the meter factor (C) from the evaluation unit of the calibration plant (a) to an evaluation unit of the Coriolis-flow measuring device; c. associating a Reynolds number (H) with this meter factor (D) while the Coriolis flow measuring device is connected to the calibration plant (a), and storing at least one data set of at least one number pair (D), in each case, of a Reynolds number and a meter factor, in the Coriolis flow measuring device; d. ascertaining an uncorrected measured value (E) for a flow velocity and/or a flow of a measured medium (M) at a measuring point (b), the density of the measured medium (M) at the measuring point (b) and the viscosity of the measured medium at the measuring point (b); e. ascertaining a Reynolds number based on the measured value (E) of the flow velocity and/or flow, the density and the viscosity of the measured medium (M) determined in step d) and associating a meter factor (C) with this Reynolds number; and f. correcting the uncorrected measured value (E) of flow velocity and/or flow based on the associated meter factor (C) and outputting the Reynolds number-corrected flow velocity and/or the Reynolds number-corrected flow (G), and a Coriolis flow measuring device.