Method for Checking the Properties of a Conveyed Medium of a Centrifugal Pump, in Particular for Detecting a Dry Run

Abstract

A method for checking the properties of a conveyed medium of a centrifugal pump includes detecting dry running, using a speed-controlled centrifugal pump. The method also includes varying a target speed of the speed-controlled centrifugal pump during a period of time in which the target speed is increased. The method also includes determining a motor parameter characterizing the torque of the pump. The method also includes evaluating the motor parameter characterizing the torque of the pump. The determining and evaluating are carried out taking into account a reference value. The method also includes ascertaining a property of the conveyed medium and/or the presence of dry running based on an outcome of the determining and evaluating.

Dependencies are inferred from the claim text.