Abstract: Method and apparatus for determining an operating point of a work machine and/or asynchronous motor driving the same, the operating point being characterized by the power consumed by and/or output rate of the machine, in which one or more operating point-dependent measurement variables of the machine are detected by sensors, and the measured values are evaluated and/or stored during operation of the machine. The operating point is determined without using electric measurement variables of the motor by determining a frequency linearly proportional to the fundamental tone of the machine through signal analysis, especially frequency analysis of a measured mechanical variable selected from pressure, differential pressure, power, vibration, and solid-borne or air-borne sound.

Abstract: Method and apparatus for determining an operating point of a work machine and/or asynchronous motor driving the same, the operating point being characterized by the power consumed by and/or output rate of the machine, in which one or more operating point-dependent measurement variables of the machine are detected by sensors, and the measured values are evaluated and/or stored during operation of the machine. The operating point is determined without using electric measurement variables of the motor by determining a frequency linearly proportional to the fundamental tone of the machine through signal analysis, especially frequency analysis of a measured mechanical variable selected from pressure, differential pressure, power, vibration, and solid-borne or air-borne sound.

Abstract: A device for transmitting measured values having a sensor module including miniaturized components and an evaluation unit, in which the sensor module has connections for different sensors, one or more sensors are connected to the sensor module, and the sensor detect operating states of a centrifugal pump arrangement including a pump and a drive motor as measured values. The sensor module is connected to a power supply and processes the measured values. Sensors that are connected to the sensor module are identified. The sensor module is constructed as a signal transmitter with a standardized output signal, an integrated evaluation unit, which has a microcomputer, and a display. The evaluation unit processes the measured values from the sensors and displays measured values and/or calculated variables on the display.

Abstract: A device for transmitting measured values having a sensor module including miniaturized components and an evaluation unit, in which the sensor module has connections for different sensors, one or more sensors are connected to the sensor module, and the sensor detect operating states of a centrifugal pump arrangement including a pump and a drive motor as measured values, and in which the sensor module is connected to a power supply and processes the measured values. The sensors (7, 8) which are connected to the sensor module are determined by identification means (13, 14, 15, 16). The sensor module is constructed as a signal transmitter (1) with a standardized output signal (10), with an integrated evaluation unit (2) which has a microcomputer (3), and with a display (4). The evaluation unit (2) processes the measured values from the sensors (7, 8) and displays measured values and/or calculated variables on the display (4).