Abstract: A field device and method for parameterizing a field device via a parameter, wherein to provide validation, a first checking characteristic is calculated by the field device based on the parameter and a device ID stored, where the first checking characteristic is transferred to an engineering system, the parameter to be validated and the device ID are additionally transferred to the engineering system and are output on a display, where to confirm correct parameterization, a user can input the read first checking characteristic at an operating unit of the engineering system, which first checking characteristic is then transferred back to the field device, where the received checking characteristic is compared with the calculated checking characteristic to validate the parameter such that external calculations of checking characteristics are advantageously unrequired and relation of the validation to the correct field device is ensured.

Abstract: A method and Coriolis mass flowmeter, wherein the Coriolis mass flowmeter includes at least one measurement tube through which a medium flows, at least one exciter system arranged in the central region of the at least one measurement tube which causes the measurement tube to oscillate, and at least two oscillation pick-ups arranged in front of and behind the at least one exciter system. The at least two measurement tubes are additionally each provided with at least one acceleration sensor arranged in front and/or behind the exciter system. An evaluation device is configured to receive acceleration signals from the acceleration sensors and evaluate the acceleration signals to diagnose an asymmetry in the measurement tubes such that fault states, such as deposits in one of the two measurement tubes, blockage of a tube in a flow divider or asymmetrical changes in the ability of the measurement tubes to oscillate, such as due to cracks or fractures, can advantageously be detected.