A radiometric measuring apparatus detects a measured variable in the form of a fill level, a point level, a density and/or a mass flow, and includes a scintillator embodied to generate light pulses upon excitation by ionizing radiation, an optoelectronic sensor embodied to convert the light pulses into a sensor signal, a first signal processing unit embodied to process the sensor signal into a first measured variable signal, an adjustable second signal processing unit embodied in a measurement setting to process the sensor signal into a second measured variable signal, wherein the second measured variable signal corresponds to the first measured variable signal in the case of a correctly processing first signal processing unit and a correctly processing second signal processing unit, and embodied in at least one operation setting to process the sensor signal into at least one operating variable signal, wherein the at least one operating variable signal does not correspond to the measured variable signals, a setting unit embodied to set the second signal processing unit into the measurement setting in measured variable time intervals and into the at least one operation setting in operating variable time intervals that alternate with the measured variable time intervals, and an assessment unit embodied to compare the first measured variable signal and the second measured variable signal with one another and to assess the first signal processing unit and/or the second signal processing unit to be processing correctly or incorrectly, depending on a result of the comparison.

System and method for controlling operation of a vehicle having a fluid reservoir. The system includes one or more fluid level indicators configured to respectively obtain a measured fluid level in the fluid reservoir. A plurality of sensors is operatively connected to the vehicle and configured to respectively obtain one or more parameters. A controller is configured to determine if a fluid level transition between the measured fluid level and a past fluid level is indicated, when there is exactly one fluid level indicator. The controller is configured to identify a reporting state from among a first state, a second state and a third state, based in part on a correlation to a dynamic event and an expected direction for the fluid level transition. A control action is executed by the controller based in part on the reporting state.

The invention provides a level switch having a near field communications facility which allows at least some functions of the switch to be powered and the communication of data between the switch and a reader. Application and calibration information are examples of data that can be read to and from the switch, both in the factory and in the field.

A battery operated level measuring device with a remaining life determination device which provides information from which a minimum value of the remaining battery life can be calculated. This calculation of the remaining battery life can be done in the measuring device or cloud.

In a method to measure changes of the pair of differential transmission lines, an in-phase signal is generated by combining first and second signals transmitted through the pair of differential transmission lines, a phase of the second signal being opposite to the first signal. In a transmission line diagnostic device, a signal combiner extracts the first and second signals received by a communication unit, combines the extracted those signals, and generates an in-phase signal, a detector detects the generated in-phase signal, and a determination unit determines an error when a magnitude of the detected in-phase signal is equal to or greater than a threshold value. In a liquid level detection device, a combining unit combines the first and second signals and generate an in-phase signal, a detection unit detects a voltage of the generated in-phase signal, and a calculation unit calculates a liquid level from the detected voltage.

A system and a method for fault detection for a liquid level sensing device are provided. The liquid level sensing device comprising a plurality of switches arranged to measure variance in a liquid level. A sensing signal comprising a plurality of measurements indicative of the liquid level is received from the liquid level sensing device. Each measurement is obtained in response to one or more of the plurality of switches being in a given position at a given liquid level. It is determined, based on the sensing signal, whether the liquid level changed according to one or more expected change patterns. A fault signal is output in response to determining that the liquid level changed according to an abnormal change pattern.

A circuit for simulating a capacitance fuel probe, the circuit comprising: an input for receiving an alternating current (AC) excitation signal; an output for outputting an output signal representing a capacitance of the simulated fuel probe; a single reference capacitance; a first amplifier connected to the reference capacitance, the first amplifier being configured to cause a current flow through the reference capacitance; a second, variable gain, amplifier, the second, variable gain amplifier being configured to output an AC signal representing a multiple of the current flow through the reference capacitance, wherein the AC signal output by the second amplifier is used to generate the output signal.

A method for calibrating a filling system is disclosed. In a first calibration step, a calibration of a calibration variable of a first flow or level measuring device is performed at a first calibration point. In a first deviation determination step, the first control and evaluation unit of the measuring device determines an average deviation of the calibration variable from a desired value. In a first correction step, the first control and evaluation unit corrects a calibration parameter taking into account the determined deviation. In a first transmission step, the first control and evaluation unit transmits the determined deviation and/or the corrected calibration parameter to the second control and evaluation unit. In a first adaptation step, the second control and evaluation unit corrects a calibration parameter at a first calibration point, taking into account the deviation transmitted by the first control and evaluation unit or the transmitted calibration parameter.

The present invention relates to a method of proof-testing a radar level gauge system arranged to determine a filling level of a product in a tank, the method comprising the steps of: transmitting an electromagnetic transmit signal towards a surface of the product in the tank; receiving an electromagnetic reflection signal resulting from reflection of the transmit signal at the surface of the product; forming a measurement representation based on the transmit signal and the reflection signal, the measurement representation comprising surface echo information indicative of the filling level of the product; adding, to the measurement representation, proof test echo information indicative of a predefined proof test level, resulting in a modified measurement representation; processing the modified measurement representation to determine a proof test level based on the modified measurement representation; and providing a signal indicative of a result of the processing.

The invention relates to a compensation device for the compensation of a phase shift caused a component of an electronic system unit of a vibronic sensor. The compensation device includes a bridging unit for the electrical bridging of at least the electromechanical converter; a signal generator for generating a test excitation signal; a phase detection unit for determining the phase shift between the test excitation signal and a test receive signal that passes through the bridging unit and the component of the electronic system unit; and a computer unit which determines a phase compensation instruction from the first phase shift.