A method for measuring the pressure in the case of a coriolis mass flow measuring instrument - and - coriolis mass flow measuring device

摘要

Is described and illustrated a method (1) for measuring the pressure in the case of a coriolis - mass through flow measuring device (2), wherein the coriolis - mass through flow measuring device (2) at least one measuring tube (3), at least one oscillator (4), at least two vibration sensors (5), at least one temperature sensor (6), at least a voltage sensor (7), at least one display unit (8) and at least one control - and evaluation unit (9), wherein the measuring tube (3) of a medium flows, wherein the temperature sensor (6) is arranged in such a way that it is the temperature of the measuring tube (3) measures and, as the temperature measured value t to the drive - and evaluation unit (9), wherein the voltage sensor (7) is designed and arranged in such a way that the voltage sensor the mechanical tension of the measuring tube (3) in the axial direction and / or in the circumferential direction and an axial 3a, b, s_a 3a, b, s and / or a_h the circumferential direction on the driving - and evaluation unit (9) and wherein the pressure (13) of the medium based on the temperature measured value t and at least one c s_a and / or s_h it is determined. The object to provide a method with which the pressure within the measuring tube can be determined in a particularly simple manner, is achieved in that the determination of the pressure value (13) within the measuring tube (3), starting from a pressure p₀ by means of an algorithm is carried out, wherein p₀ under reference conditions was received, and, moreover, that the algorithm the difference between the temperature measured value t and a reference measuring value t₀ 3a, b, s and between at least one_a and / or s_h and a reference measuring values, s_a0 and / or s_h0 taken into account, with the reference measuring values t₀ and / or s_a0 and / or s_h0 under reference conditions were measured by means of the algorithm and that the specific pressure value (3) via the display unit (8) is output.n="17"