Abstract: The present invention relates to a field device adapted to determine a process parameter value related to a tank, the field device comprising a terminal block with: a first interface configured to connect to two wires of a loop; a first electrical conductor and a second electrical conductor for connecting the first interface with field device electronics, the second electrical conductor having a voltage drop generating element; a first power supply conductor connected to said second electrical conductor upstream of the voltage drop generating element and a second power supply conductor connected to said second electrical conductor downstream of the voltage drop generating element; and a second, auxiliary interface adapted for wired connection to an external device and configured at least for communication with said external device, wherein the second auxiliary interface comprises a communications connector which is galvanically isolated from the field device electronics.

Abstract: The present invention relates to a method of controlling a pulsed radar level gauge system, comprising the steps of: acquiring a signal indicative of a present operating temperature; determining an initial frequency control parameter for control of at least one of transmission signal generating circuitry and reference signal generating circuitry based on the present operating temperature and a plurality of data sets each comprising data indicative of a previous operating temperature and a previously determined frequency control parameter for the previous operating temperature; and controlling, starting from the initial frequency control parameter, at least one of the transmission signal generating circuitry and the reference signal generating circuitry to achieve the known frequency difference between the first pulse repetition frequency and the second pulse repetition frequency at the present operating temperature.

Abstract: A radar level gauge system, for determining a filling level of a product in a tank. The radar level gauge system includes a transmission line probe arranged inside the tank; a tank feed-through for mechanically attaching the transmission line probe to a tank wall of the tank through a non-conductive mechanical connection between the transmission line probe and the tank wall, and for providing a conductive electrical connection to the transmission line probe from outside the tank; and a measurement electronics unit arranged outside the tank. The measurement electronics unit includes: a transceiver; an electrical filter circuit having an input coupled to the transceiver and an output coupled to the transmission line probe via the tank feed-through, the electrical filter circuit exhibiting a series capacitance for non-conductively coupling the transceiver to the transmission line probe via the tank feed-through; and processing circuitry for determining the filling level.

Abstract: A method for powering a radar level gauge, comprising an initial frequency stabilization procedure, ensuring a stable separation frequency between a first and a second clock frequencies, during which frequency stabilization procedure said radar level gauge is not powered to provide a level output, and a subsequent measurement cycle, performed only when a stable separation frequency has been established, during which said radar level gauge is powered to provide a level output. The present invention allows a radar level gauge system to save power by not providing power to and operating the radar level gauge circuit during such times when the frequency separation would not enable the radar level gauge to provide proper level measurements.

Abstract: The present invention relates to a pulsed level gauge system comprising frequency control circuitry. If an acquired signal indicates that the time between the previous filling level determination and the present filling level determination is shorter than a predefined time, the frequency control circuitry controls at least one of a transmit signal generating circuitry and a reference signal generating circuitry comprised in the pulsed level gauge system using previous frequency control settings stored in memory.

Abstract: A power generation plant including a solar radiation receiver for heating a medium stream and a turbine assembly being arranged to receive the heated medium stream from the solar radiation receiver, said turbine assembly being coupled to an electric power generator, wherein a combustor is positioned downstream of the solar radiation receiver and upstream of the turbine assembly, an air compressor unit having a compressed air outlet is arranged to supply compressed combustion air to the combustor, and a steam generator is arranged to extract heat from an outlet flow from the turbine assembly, and to produce steam to be transmitted to a medium stream inlet of the solar radiation receiver and subsequently to combustor. The invention also related to a method.

Abstract: An arc monitor for tripping a circuit breaker in the event of an arc occurrence, the arc monitor including at least one arc detector and arranged to be operatively connected to at least one circuit breaker. The arc monitor includes a base unit and at least one extension unit with at least one arc detector input terminal, the at least one arc detector being connectable to the at least one arc detector input terminal, and the base unit includes a control unit. The extension unit is operatively connectable to and arranged to send an arc occurrence signal to the control unit, which is arranged to send a trip signal for tripping the at least one circuit breaker, in the event of an arc occurrence. Also an electrical installation including an arc monitor, and the use of an arc monitor as a supervision and safety equipment in an electrical installation.

Abstract: A method for powering a radar level gauge, comprising an initial frequency stabilization procedure, ensuring a stable separation frequency between a first and a second clock frequencies, during which frequency stabilization procedure said radar level gauge is not powered to provide a level output, and a subsequent measurement cycle, performed only when a stable separation frequency has been established, during which said radar level gauge is powered to provide a level output. The present invention allows a radar level gauge system to save power by not providing power to and operating the radar level gauge circuit during such times when the frequency separation would not enable the radar level gauge to provide proper level measurements.

Abstract: The present invention relates to a pulsed level gauge system comprising frequency control circuitry. If an acquired signal indicates that the time between the previous filling level determination and the present filling level determination is shorter than a predefined time, the frequency control circuitry controls at least one of a transmit signal generating circuitry and a reference signal generating circuitry comprised in the pulsed level gauge system using previous frequency control settings stored in memory.

Abstract: A method of determining a filling level of a product contained in a tank using a level gauge system, comprising the steps of: transmitting a first signal towards a surface of the product; receiving a first echo signal; determining a present echo characteristic value based on the first echo signal; and comparing the present echo characteristic value and a stored echo characteristic value. If a difference between the present echo characteristic value and the stored echo characteristic value is greater than a predefined value, the method further comprises transmitting at least a second transmit signal towards the surface; receiving at least a second echo signal; and determining the filling level based on the at least second electromagnetic echo signal.

Abstract: The present invention relates to a method comprising providing an activation signal from a wireless communication unit to a measurement unit to switch the measurement unit from its inactive state to its active state; providing a measurement request signal to the measurement unit to request measurement of a filling level of a product in a tank; and thereafter switching the wireless communication unit from its active state to its inactive state. The measurement unit measures the filling level and provides a measurement ready signal to the wireless communication unit; the wireless communication unit is switched from its inactive state to its active state in response to the measurement ready signal received from the measurement unit; the wireless communication unit retrieves the value indicative of the filling level from the measurement unit; and wirelessly transmits the value indicative of the filling level to the remote device.

Abstract: The method comprises the steps of generating a transmission signal; propagating the transmission signal towards the product; receiving a reflected signal; providing a reference signal exhibiting a time-varying phase difference in relation to the transmission signal; forming a measurement signal; and determining the filling level based on the measurement signal. The method further comprises the steps of: determining a reduced time period comprising a time when the time-varying phase difference corresponds to an anticipated filling level, the reduced time period being shorter than the measurement sweep time period; controlling the level gauge system to change from a low-power state to a high-power state at a start of the reduced time period; and controlling the level gauge system to change back from the high-power state to the low-power state at an end of the reduced time period.

Abstract: A power generation plant including a solar radiation receiver for heating a medium stream and a turbine assembly being arranged to receive the heated medium stream from the solar radiation receiver, said turbine assembly being coupled to an electric power generator, wherein a combustor is positioned downstream of the solar radiation receiver and upstream of the turbine assembly, an air compressor unit having a compressed air outlet is arranged to supply compressed combustion air to the combustor, and a steam generator is arranged to extract heat from an outlet flow from the turbine assembly, and to produce steam to be transmitted to a medium stream inlet of the solar radiation receiver and subsequently to combustor. The invention also related to a method.

Abstract: A power management circuitry for a radar level gauge including a first voltage converter, having a low-voltage end for receiving a drive voltage from a power interface and a high-voltage end for supplying an intermediate voltage higher than the required operating voltage, a temporary energy store arranged to be charged by the intermediate voltage, a second voltage converter, having a high-voltage end for receiving an input voltage from the energy store, and a low-voltage end for providing the operating voltage lower than the input voltage. By storing energy at a higher voltage, a different type of energy store (e.g. low capacity capacitor) may be used. As a consequence, the cost and start-up time of the energy store is significantly reduced.

Abstract: The present invention relates to a method of controlling a pulsed radar level gauge system, comprising the steps of: acquiring a signal indicative of a present operating temperature; determining an initial frequency control parameter for control of at least one of transmission signal generating circuitry and reference signal generating circuitry based on the present operating temperature and a plurality of data sets each comprising data indicative of a previous operating temperature and a previously determined frequency control parameter for the previous operating temperature; and controlling, starting from the initial frequency control parameter, at least one of the transmission signal generating circuitry and the reference signal generating circuitry to achieve the known frequency difference between the first pulse repetition frequency and the second pulse repetition frequency at the present operating temperature.

Abstract: The present invention relates to a method comprising providing an activation signal from a wireless communication unit to a measurement unit to switch the measurement unit from its inactive state to its active state; providing a measurement request signal to the measurement unit to request measurement of a filling level of a product in a tank; and thereafter switching the wireless communication unit from its active state to its inactive state. The measurement unit measures the filling level and provides a measurement ready signal to the wireless communication unit; the wireless communication unit is switched from its inactive state to its active state in response to the measurement ready signal received from the measurement unit; the wireless communication unit retrieves the value indicative of the filling level from the measurement unit; and wirelessly transmits the value indicative of the filling level to the remote device.

Abstract: The method comprises the steps of generating a transmission signal; propagating the transmission signal towards the product; receiving a reflected signal; providing a reference signal exhibiting a time-varying phase difference in relation to the transmission signal; forming a measurement signal; and determining the filling level based on the measurement signal. The method further comprises the steps of: determining a reduced time period comprising a time when the time-varying phase difference corresponds to an anticipated filling level, the reduced time period being shorter than the measurement sweep time period; controlling the level gauge system to change from a low-power state to a high-power state at a start of the reduced time period; and controlling the level gauge system to change back from the high-power state to the low-power state at an end of the reduced time period.

Abstract: A method of determining a filling level of a product contained in a tank using a level gauge system, comprising the steps of: transmitting a first signal towards a surface of the product; receiving a first echo signal; determining a present echo characteristic value based on the first echo signal; and comparing the present echo characteristic value and a stored echo characteristic value. If a difference between the present echo characteristic value and the stored echo characteristic value is greater than a predefined value, the method further comprises transmitting at least a second transmit signal towards the surface; receiving at least a second echo signal; and determining the filling level based on the at least second electromagnetic echo signal.

Abstract: A radar level gauge system comprising power management circuitry for regulating operating power to be used by a microwave unit and a processing circuitry of the radar level gauge system. The power management circuitry comprises a DC-DC converter having an input terminal connected to the interface, an output terminal connected to the microwave unit and the processing circuitry, and a reference terminal connected to an electrical reference point, wherein a first voltage level at the input terminal and a second voltage level at the output terminal relates to a reference voltage level at the electrical reference point. The power management circuitry further comprises an energy storage capacitor connected between the input and output terminals of the DC-DC converter. According to this design, the capacitance of the power management circuitry gets reduced due to that the capacitance is originating from a series capacitance.

Abstract: A power management circuitry for a radar level gauge including a first voltage converter, having a low-voltage end for receiving a drive voltage from a power interface and a high-voltage end for supplying an intermediate voltage higher than the required operating voltage, a temporary energy store arranged to be charged by the intermediate voltage, a second voltage converter, having a high-voltage end for receiving an input voltage from the energy store, and a low-voltage end for providing the operating voltage lower than the input voltage. By storing energy at a higher voltage, a different type of energy store (e.g. low capacity capacitor) may be used. As a consequence, the cost and start-up time of the energy store is significantly reduced.