Samson Aktiengesellschaft

Ksb Aktiengesellschaft

Ksb Se & Co. Kgaa

Jörg Kiesbauer

Stefan Kolbenschlag

Heinfried Hoffmann

Rainer Oberheim

Frank Valentin-Rumpel

Thomas Karte

Domagoj Vnucec

Thomas Paulus

Manfred Oesterle

Ulrich Schulz

Dirk Hoffmann

Stefan Unland

Julian Fuchs

Ulrich Konigorski

Mario Menze

Anke BRÄUER

Karl-Bernd Schärtner

Klaus Hörschken

The invention relates to a method for monitoring the functionality of an actuator () having a pneumatic drive (), in particular for monitoring an actuator () for a safety valve, including a magnetic valve () for controlling the pneumatic drive (), wherein the magnetic valve () is monitored by means of a pressure measurement and is, for this purpose, connected to a first pneumatic conduit () to a position controller () of the actuator () as well as to the pneumatic drive () to a second pneumatic conduit (). The magnetic valve () is switched off and on again with a switching time (t-t). The switching time (t-t) of the magnetic valve () is detected at which, at the one hand, the switching time (t-t) is so short that the position of the actuator () remains essentially constant or unchanged and, on the other hand, it is, however, so long that a pressure drop (dp=P-P) in the first pneumatic conduit () in front of the magnetic valve () is present after switching the magnetic valve () on again.

Method and device for testing the functionality of an actuator having a pneumatic drive

In a method or device for function-monitoring an actuator in a process engineering plant, said actuator comprising a valve and an actuating drive for actuating said valve. A positioner is provided for setting a position of the valve, the positioner comprising a controller module. A predefined activation test signal is generated and applied to the controller module to position the actuator into a predefined function condition. A control signal is generated by the controller module for signalling the actuating drive in accordance with the activation test signal and an output control signal is sensed and monitored as compared to a reference control signal.

Method and device for function-monitoring an actuator

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Eppertshausen, Germany

Jörg Kiesbauer