Abb Research Ltd.

Schoppe & Faeser Gmbh

Emrullah Altiok

Peter Krippner

Wolfgang Scholz

Rolf Merte

Armin Gasch

Raiko Milanovic

Wilhelm Daake

Andrea Moroni

Fabrizio Lorito

Peter Riegler

Jürgen Biskup

Franco Vecchiato

Corrado Bianchi

Eugenio Volonterio

Horst Obermeier

The invention relates to a device and a method for the status monitoring of a pressure measuring unit in an absolute or differential or relative pressure transducer, a pressure-sensitive element installed in the pressure measuring unit being impinged with at least one pressure generated by at least one membrane. During a defined diagnosis time interval, a testing element integrated in the pressure measuring unit is induced to undergo a change in volume, preferably by electrical activation. The pressure difference caused as a result in the pressure measuring unit is registered by a pressure-sensitive element. The curve registered during a diagnosis time interval is compared with a reference curve recorded with the pressure measuring unit intact. A fault indication is given if the deviations between the registered curve and the reference curve exceed predetermined tolerance values.

Device and method for the status monitoring of a pressure measuring unit

A pressure transducer including a rotationally symmetrical pressure sensor made of a ceramic material and having a front face configured as a membrane, further having a housing for and containing the pressure sensor, the housing having a rotationally symmetrical base part and a pot with side walls gripping around the base part, and a sealing ring is interposed between the membrane of the pressure sensor and the base part of the housing, is improved by a glass layer of about 10 .mu.m thickness having been pressure deposited by screen printed for covering at least a portion of the membrane where facing the base part of the housing and being intimately bonded to the sealing ring.

Pressure transducer

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Minden, Germany

Emrullah Altiok