Measuring system with a tube arrangement having two measuring tubes flowed through in parallel, as well as method for monitoring the arrangement

US8359933B2 · kind B2 · utility

Assignee

• ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

• Wolfgang Drahm · Erding, DE
• Christof Huber · Bern, CH
• Vivek Kumar · Troy, US
• Alfred Rieder · Landshut, DE
• Hao Zhu · Freising, DE

Key dates

• Filing date: Nov 16, 2010
• Grant date: Jan 29, 2013
• Expiry date: Apr 7, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F15/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For monitoring the tube arrangement, the measuring system of the invention includes, connected to the transmitter electronics, a temperature measuring arrangement having a first temperature sensor for producing a temperature signal dependent on a temperature of a first of the measuring tubes of the tube arrangement and at least a second temperature sensor for producing a temperature signal dependent on a temperature of a second of the measuring tubes of the tube arrangement. In the method of the invention, it is provided that, in the case of medium flowing through the tube arrangement, a temperature difference existing between the at least two measuring tubes as a result plugging is ascertained and, in case the ascertained temperature difference deviates from a predetermined limit value for the temperature difference representing a non-plugged tube arrangement, a partial plugging of the tube arrangement, especially a plugging of exactly one of the measuring tubes, is signaled.