Abb Patent Gmbh

Bailey-fischer & Porter Gmbh

Jorg Herwig

Frank Buhl

Rene Friedrichs

Axel Rossberg

Jens Timmer

Frank Kassubek

Steffen Keller

Armin Gasch

Kuno Hug

Wolfgang Waldi

Lothar Deppe

Peter Riegler

Axel Papenbrock

Kilian Bartholome

Klaus Schafer

The invention relates to a method for monitoring a measurement device, in particular a flow measurement device, and to a measurement device itself. In order in this case to reliably preclude measurement errors resulting from incorrect installation, the invention proposes that a characteristic variable is calculated from a time series s(t) of the measurement signal of a measurement device and is compared with previously recorded reference values, with this being used as the basis to automatically generate a message as to whether the measurement device has been installed correctly or incorrectly.

Method for monitoring the installation of a measurement device

A measuring instrument whose measuring principle is based on an oscillator, for example an eddy counter, and in which there is arranged a sensor for recording a measured signal (S(t)), which can be supplied to an evaluation unit (), characterized in that, from the phase increments psi(tau,t), that is to say from the differences between the instantaneous values phi(t) of the phase signal derived from the measured signal S(t) in a phase extractor () and values phi(t-tau) time-delayed by a delayed time tau, a coupling indicator value (KI) is formed in such a way that the existence of phase coupling with a further oscillator can be detected on the latter by means of comparison with a coupling reference value (KR).

Measuring instrument and method of measuring flows

Coriolis mass flowmeter with a measuring pipe () vibrating in coupled flexural and torsional modes, characterized in that an attachment () which is formed rotationally symmetrically with respect to an axis of rotational symmetry and can be made to undergo torsional oscillations of the same frequency, but opposite phase, in relation to the torsional oscillating modes of the measuring pipe () is mechanically connected to the measuring pipe () and the axis of rotational symmetry of the attachment runs parallel to the straight line () (central axis) defined by the center points () of the cross-sectional areas () of the inlet and outlet of the measured section or coincides with this line.

Coriolis mass flowmeter

Magneto-inductive flow measurement using a pulsed and/or reversing pulsed constant field wherein the measurement voltage which is induced by the flow, running transversely with respect to the magnetic field, of the measurement medium in the measurement tube of the magneto-inductive flowmeter is sampled in each clock time interval when the coil current is applied, even if the magnetic field has not yet reached its steady-state. Empirically determined correction values are used to correct the samples to the situation when measurements are carried out with a steady-state magnetic field. Calibration measured values can be recorded in a steady-state magnetic field from time to time, in order to check and, if required, to correct the correction factors. The coil current can be switched at frequencies which alternate with one another in time, the number of periods of the mutually alternating period sequences being varied in an irregular manner.

Method and apparatus for magneto-inductive flow measurement

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Adelebsen, Germany

Jorg Herwig