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Ambient temperature sensor placement on Coriolis mass flow sensor

IP.com Disclosure Number: IPCOM000167486D
Original Publication Date: 2008-Feb-25
Included in the Prior Art Database: 2008-Feb-25
Document File: 1 page(s) / 110K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Depending on the design of Coriolis mass flow sensors, it can be necessary to implement a temperature correction function which compensates influences on the mass flow measurement depending on the ambient temperature. This function can be implemented by using a temperature sensor which is placed on the Coriolis mass flow sensor frame. However, the compensation function is dependent on the location, where the ambient temperature sensor is placed on the sensor frame.

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Ambient temperature sensor placement on Coriolis mass flow sensor

Idea: Jan Zangenberg, DK-Nordborg

Depending on the design of Coriolis mass flow sensors, it can be necessary to implement a temperature correction function which compensates influences on the mass flow measurement depending on the ambient temperature. This function can be implemented by using a temperature sensor which is placed on the Coriolis mass flow sensor frame. However, the compensation function is dependent on the location, where the ambient temperature sensor is placed on the sensor frame.

Therefore, it is proposed to place the ambient temperature sensor on a certain location which ensures an optimal compensation of disturbing influences due to decreasing sensitivity of the Coriolis mass flow sensor. Figure 1 depicts an example of the temperature distribution of the Coriolis mass flow sensor frame after heating treatment from 20°C to 200°C. In addition, there are shown four possible locations for the ambient temperature sensor. The optimum placement of the ambient temperature sensor is between the 0.15th and 0.25th part of the sensor frame length from either end of the frame resulting in an almost linearly dependent characteristic of the Coriolis mass flow sensor.

Figure 1: Temperature distribution of the Coriolis mass flow sensor frame

© SIEMENS AG 2008 file: 2007J27...