Krohne Messtechnik Gmbh

Alexander Erkelenz

Ralf Storm

Achim Matt

Helmut Brockhaus

Johannes Kunze

Volker Stegemann

Stegemann Volker

A method for operating a Coriolis mass flowmeter includes: calculating error-free oscillation signal phase differences using a first measuring channel pair with a first measuring channel phase difference; calculating averaged error-containing oscillation signal phase differences using a second measuring channel pair with a second measuring channel phase difference; determining error-containing oscillation signal phase differences using a third measuring channel pair with negligible measuring channel phase difference; determining the second measuring channel phase difference by difference formation from the averaged error-containing oscillation signal phase differences of the second measuring channel pair and the error-free oscillation signal phase differences of the first measuring channel pair; obtaining error-free oscillation signal phase differences by subtracting the determined second measuring channel phase difference from the error-containing oscillation signal phase differences of the third measuring channel pair; and using the error-free oscillation signal phase differences for determining the mass flow rate.

Method for operating a Coriolis mass flowmeter and corresponding Coriolis mass flowmeter

A measuring device with at least one sensor and at least one transmitter housing, wherein the transmitter housing has at least one terminal space and an electronics space adjacent to the terminal space and connected via a partition wall, wherein at least a first electronic device for the connection of supply and/or I/O lines is arranged in the terminal space and wherein at least a second electronic device is arranged in the electronics space with electronics for controlling the sensor, wherein the first electronic device and the second electronic device are electrically conductively connected to one another via a contacting unit, wherein the contacting unit is removably inserted into a recess of the partition wall. The A measuring device that is simple to produce and whose components can be particularly easily replaced is achieved by the contacting unit being firmly connected to the first electronic device.

Measuring device, transmitter housing and method for producing a measuring device

A device for receiving an electronics assembly having a closed housing with a housing wall, at least one electronic component, a holder and a fan with a fan housing, wherein the electronic component, the holder and the fan are arranged within the housing, and the fan is arranged in the holder. To provide a device for receiving an electronics assembly that enables an alternative cooling of the electronics assembly in a closed housing is achieved in that the fan is designed as a revolving blade fan and by the fact that the fan generates a continuous air flow for cooling the electronic unit during operation.

Device for receiving an electronics assembly

Described and shown is a method for operating a Coriolis mass flowmeter () having at least one measuring tube (), an oscillation exciting device () for exciting the measuring tube () to an oscillation (), at least a first oscillation sensor () and a second oscillation sensor () and at least a first sensor signal path and a second sensor signal path. The object of the invention is to provide a method in which the measuring accuracy is increased compared to the prior art. The object is achieved in that at least one first test signal is generated having at least one first test signal frequency, that the at least first test signal is fed at least into the first sensor signal path and into the second sensor signal path, that the at least first test signal is guided by the first sensor signal path over the first oscillation sensor () and by the second sensor signal path over the second oscillation sensor (), that a test signal propagation time difference of at least the first test signal is determined at least between the first sensor signal path and the second sensor signal path, and that a sensor signal propagation time difference between a first sensor signal and a second sensor signal is compensated with the test signal propagation time difference. Additionally, the invention relates to a corresponding Coriolis mass flowmeter.

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Moers, Germany

Alexander Erkelenz