Abstract: A method for adjusting a current sensor with a measuring element having a broken rational current-voltage characteristic curve, including:—changing the broken rational profile of the broken rational current-voltage characteristic curve of the measuring element on the basis of at least one predetermined condition.

Abstract: A fault detection device comprises: a measurement data acquirer that acquires measurement data for current flowing on power supply lines that are connected to multiple electrical devices; a clusterer that classifies the measurement data for a past fixed period into multiple clusters based on at least one of frequency and phase with respect to an AC cycle; a pattern analyzer that analyzes each of the clusters for an appearance pattern of measurement data that satisfy a preset standard; and a fault determiner that determines the occurrence of a fault when measurement data is acquired that differs from the analyzed appearance pattern.

Abstract: There are disclosed apparatus and methods for testing a live circuit powered from an alternating current (AC) voltage. A live circuit tester includes a spread spectrum time domain reflectometer (SSTDR) configured to perform SSTDR measurements of the live circuit and a memory storing one or more ignore distance values. A processor coupled to the SSTDR and the memory detects a potential fault in the live circuit based on results of one or more SSTDR measurements, the potential fault associated with a distance from the apparatus. The processor compares the distance associated with the potential fault with each of the one or more ignore distance values, and stores, in the memory, data defining the potential fault if the associated distance does not match any of the one or more ignore distance values.

Abstract: The present disclosure is directed to an integrated electrostatic sensor for an engine. The sensor includes an outer housing having a body with a first end and a second end. The first end is configured for securing the sensor to the engine and includes a sensing face. The sensor also includes an electrode configured within the housing adjacent to the sensing face and an amplifier configured with the electrode. The electrode contains a plurality of electrons configured to move as charged particles flow past the sensing face. Thus, the amplifier is configured to detect a particulate level as a function of the electron movement. The electrostatic sensor also includes a circuit board configured within the housing and electrically coupled to the amplifier. As such, the circuit board is configured to send one or more signals to a controller of the engine indicative of the particulate level.

Abstract: The systems and methods of the present disclosure use measurement circuitry that includes first and second circuits, a selecting circuit, a determination circuit, and a setting circuit. Each of the first and second circuits measures voltage or current sensed by a sensor. The selecting circuit selects the first circuit to provide the measured voltage or current values. The determination circuit determines whether the measured voltage or current values reach a predetermined level. The setting circuit changes a setting of the second circuit from a first setting to a second setting if the measured voltage or current values reach the predetermined level. The selecting circuit selects the second circuit to provide the measured voltage or current values when a first predetermined time elapses after changing the setting of the second circuit. The selecting circuit also changes a setting of the first circuit from the first setting to the second setting after selecting the second circuit.

Abstract: A measurement system and method for conducting measurements on a device-under-test (DUT). The system includes, in one embodiment, a passive impedance controlling tuner, and a signal transmission line, the tuner including a signal transmission line segment as at least part of the signal transmission line. A signal coupling device is coupled in a non-contacting relationship to the signal transmission line between a signal port of the DUT and the tuner for sampling signals propagating between the passive impedance controlling tuner and the DUT to allow measurement of an actual impedance presented to the DUT with the DUT in place in the measurement system during measurement of DUT characteristics. Measurement system equipment receives response signals from the signal coupler. The measurement system is configured to conduct measurement of DUT characteristics without pre-characterizing the impedance controlling tuner.

Abstract: A system and method to detect the fundamental frequency of an electric input signal using a feedback control loop including a phase error detector, a loop controller, and a digitally controlled oscillator. The frequency detector may detect the fundamental frequency of an electric input signal and produce an output signal representing the fundamental frequency of the electric input signal. The frequency detector may further include a filter that may be coupled to the frequency detector output signal in order to remove spurious tones or noise from the output signal.

Abstract: A water-resistant capacitance sensing apparatus comprising a plurality of capacitive sense elements and a capacitance sensing circuit configured to measure both the mutual capacitance and self-capacitance on the plurality of capacitive sense elements. A method for water-resistant capacitance sensing, the method comprising performing a self-capacitance scan and a mutual capacitance scan, and detecting, by a processing device, a presence of an object with the plurality of sense elements. The method further determines whether the detected presence of the object is legitimate.

Abstract: A EUT (equipment under test) positioning device is disclosed. The device comprises a holder element configured to hold EUT, a sliding element configured to move the holder element horizontally, a rotating element attached to the sliding element and configured to rotate the holder element, at least three telescopic elements attached to the rotating element and configured to independently move the holder element vertically, at least five actuators individually attached to the sliding element, the rotating element and the telescopic elements, wherein the actuators are configured to activate movement of the sliding element, the rotating element and the telescopic elements, and a position monitoring element configured to monitor the position of EUT. The holder element, the sliding element, the rotating element, and the telescopic elements comprise radio frequency transparent material.

Abstract: A microwave module 1 for a fill level measuring device 2 operating with the runtime method, has a chip for generating and/or receiving microwave signals and a carrier element. To provide an advantageous as possible microwave module, the chip is located in a cavity 9 of the carrier element 8.

Abstract: A method and device for determining an insulation variable of a network. The method may comprise measuring a first voltage at the network, connecting the auxiliary system to the network, measuring a second voltage at the network, disconnecting the auxiliary system from the network, measuring a third voltage at the network, and determining the insulation variable based on the first voltage, the second voltage, and the third voltage.

Abstract: An electric power meter capable of monitoring a contact status of a latch relay, comprises: a latch relay having a pair of primary coils and a secondary contact, the secondary contact operable to a closed position or an open position, the primary coils configured to provide a magnetic force to open or close the secondary contact; and a meter controller configured to determine that the latch relay is in a closed position when the input voltage of the primary coils is substantially equal to the output voltage of the secondary contact with a predetermined allowable error range, and configured to determine that the latch relay is in an open position when the output voltage of the secondary contact has not been input, even if the input voltage of the primary coils has been input.

Abstract: A system for detecting an electrical fault in an electrical installation including several electrical conductors, the system including at least two measurement modules, each measurement module including first radioelectric communication device, a sensor for measuring each electrical magnitude associated with a corresponding electrical conductor and a first clock defined by a first initial instant and a first clock frequency, each measured value being suitable for being associated with a first instant of measurement, determined with respect to the first initial instant and as a function of the first frequency, an acquisition unit, including second radioelectric means adapted for communicating with the first radioelectric communication device.

Abstract: This method for determining whether an acidic aqueous solution is usable or not comprises: a first detection step (S21) in which the solution concentration of an acidic aqueous solution resulting from pickling is determined; a second detection step (S23a, S23b) in which the concentration of a specific metal in the acidic aqueous solution resulting from pickling is determined, the metal having been contained in the coating layer; a concentrated-solution addition step (S25b) in which in cases when the solution concentration is equal to or less than a predetermined first threshold, a concentrated acidic aqueous solution is newly added; and a determination step (S24a, S24b) in which in cases when the concentration of the specific metal is equal to or higher than a predetermined second threshold, it is determined that the acidic aqueous solution is unusable.

Abstract: A method for detecting the degree of soiling of PV modules of a string includes the following steps: determination of the deviations of the string power output values from a calculated reference value over the last year; calculation of a historical trend line from the deviations; determination of a maximum difference between the trend line and the deviations; calculation of final deviations of the power output values through subtraction of the maximum difference from the trend line; and determination of the degree of soiling through subtraction of the final deviations from the deviations.

Abstract: This document discusses, among other things, a detection system configured to identify a type of a pole of a four-pole audio jack using first and second comparators. The detection system can include a bias circuit configured to bias a detection input coupled to the pole, and first and second comparators configured to compare the detection input to respective first and second thresholds to provide an indication of the type of the pole.

Abstract: A method and apparatus include a plurality of sensor elements arranged within an integrated circuit package and a controller arranged within the integrated circuit package and coupled to the plurality of sensor elements. The controller is configured to apply a transmit signal to a first sensor element of the plurality of sensor elements and receive a receive signal from a second sensor element of the plurality of sensor elements. The receive signal represents a mutual capacitance of the first sensor element and the second sensor element.

Abstract: There are disclosed apparatus and methods for testing a live circuit powered from an alternating current (AC) voltage. A zero crossing detector detects zero crossings of the AC voltage. A spread spectrum time domain reflectometer (SSTDR) coupled to the zero crossing detector performs measurements of the live circuit, each measurement synchronized with a zero crossings of the AC voltage. A processor coupled to the SSTDR detects faults in the live circuit based on correlation data provided by the SSTDR.

Abstract: A method for operating a sensor, including simultaneously exciting a first set of electrodes and sensing an output of each electrode of a second set of electrodes, storing output data corresponding to the output of each electrode of the second set of electrodes in a memory storage device, shifting at least one electrode from the first set of electrodes to the second set of electrodes and at least one electrode from the second set of electrodes to the first set of electrodes, and repeating the simultaneously exciting and sensing, the storing, and the shifting until an output data has been stored for each possible pair of electrodes in the first and second set of electrodes.

Abstract: A transconductance amplifier mirror circuit is connected to an electrode for sensing the capacitance of the electrode with reference to ground, or the capacitance between the electrode and another electrode. A voltage level change is produced on the electrode connected to the transconductance amplifier mirror circuit to cause the transconductance amplifier mirror circuit to supply charges to or drain charges from a charge calculation circuit. The charge amount variation is converted to a signal for calculating the sensed capacitance.