Patent Number: 
Section: claims

1. A method for commissioning pneumatically operated actuators that are controlled by a positioner, comprising:a constant flow of pneumatic fluid is applied to the actuator during commissioning,while the pneumatic fluid is applied, a drive-specific characteristic curve of the fed back position is recorded over time,the measured characteristic curve is compared with a given specimen characteristic curve, andthe drive type of the actuator is inferred from the level of difference or agreement between the drive-specific characteristic curve and the specimen characteristic curve. 2. The method as claimed in claim 1, whereinthe given specimen characteristic curve is determined by idealizing known characteristic curves of one of the two drive types to be distinguished. 3. The method as claimed in claim 1, whereinthe level of agreement between the characteristic curve of the observed actuator and the specimen characteristic curve is determined by cross-correlation. 4. The method as claimed in claim 2, whereinthe level of agreement between the characteristic curve of the observed actuator and the specimen characteristic curve is determined by cross-correlation. 5. An arrangement for commissioning an actuator, comprising:a positioner capable of determining a drive type based on a constant flow of pneumatic fluid applied to the actuator;a lifting rod mechanically caused to be moved by the constant flow of pneumatic fluid to the actuator; anda position sensor that senses the movement of the lifting rod for feedback signaling to the positioner, wherein the positioner records data for a drive-specific characteristic curve based on the feedback signal for comparison of the measured characteristic curve with a given specimen characteristic curve to infer the drive type. 6. The arrangement according to claim 5, wherein the drive type is inferred based on a level of difference or agreement between the drive-specific characteristic curve and the specimen characteristic curve. 7. The arrangement according to claim 5, wherein the actuator is a pneumatically operated actuator.