An inverter and a method for identifying a fault on an alternating current side of a photovoltaic system are provided. A controller records a waveform of a preset parameter of the photovoltaic system, and then transmits the recorded waveform to an external device. The external device that performs relatively excellently in data storage and processing stores the waveform and performs subsequent processing, to accurately recognize the fault on the alternating current side of the inverter. Further, the fine waveform can be seen from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device analyzes the waveform and generates a control instruction to accurately control the inverter due to advantages of storage capacity, big data, and computing power. In addition, system performance can be optimized in cooperation with a local control unit.

An inverter and a method for identifying a fault on an alternating current side of a photovoltaic system are provided. A controller records a waveform of a preset parameter of the photovoltaic system, and then transmits the recorded waveform to an external device. The external device that performs relatively excellently in data storage and processing stores the waveform and performs subsequent processing, to accurately recognize the fault on the alternating current side of the inverter. Further, the fine waveform can be seen from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device analyzes the waveform and generates a control instruction to accurately control the inverter due to advantages of storage capacity, big data, and computing power. In addition, system performance can be optimized in cooperation with a local control unit.

A measuring apparatus is provided for electrical signals. The measuring apparatus includes an analog-to-digital (A/D) converter configured to A/D-convert an analog signal to be measured, and an integrator configured to perform integration time processing for a plurality of digital values output from the A/D converter based on an integration time. The integrator is configured to output a plurality of measured values obtained by the integration time processing. A noise level calculation unit is configured to calculate a noise level of the analog signal to be measured from the plurality of measured values obtained by the integration time processing, and a display unit is configured to display noise levels corresponding to a plurality of integration times.

A device is disclosed that includes a control circuit, a scope circuit and a time-to-current converter. The control circuit configured to delay a voltage signal for a delay time to generate a first control signal, and to generate a second control signal according to the first control signal and the voltage signal. The scope circuit configured to generate a first current signal in response to the second control signal and the voltage signal. The time-to-current converter configured to generate a second current signal according to the first control signal and the voltage signal.

A device is disclosed that includes a control circuit, a scope circuit and a time-to-current converter. The control circuit configured to delay a voltage signal for a delay time to generate a first control signal, and to generate a second control signal according to the first control signal and the voltage signal. The scope circuit configured to generate a first current signal in response to the second control signal and the voltage signal. The time-to-current converter configured to generate a second current signal according to the first control signal and the voltage signal.

The various embodiments herein disclose an improved method and system for detection, monitoring and management of electrosmog levels at required locations which comprises of electrosmog levels being read by one or more sensors on the multiple sensor device installed at multiple locations, recording, interpreting and processing the data relating to electrosmog levels by using various scientific algorithm and mathematical calculation at the central monitoring equipment device and providing the user a simplified and more accurate data representing the levels of the electrosmog and identifying the source of the electromagnetic contamination.

An electrical test and measurement device is described that has at least one analog channel comprising an analog input, an attenuator circuit, an amplifier unit, and a digitizer. The electrical test and measurement device comprises another digitizer allocated to a digitizer input of the electrical test and measurement device. The digitizer input is configured to be connected to a measurement extension device. Further, a measurement extension device and a test and measurement system are described.

In an example, a processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module comprises a receiver, coupled to a sensor electrode, configured to receive a capacitive sensing signal. The receiver includes an in-phase channel and a quadrature channel. The in-phase channel is configured to mix the capacitive sensing signal with a local oscillator signal substantially in phase with the capacitive sensing signal. The quadrature channel is configured to mix the capacitive sensing signal with a phase-shifted signal near ninety degrees out of phase with the capacitive sensing signal. The determination module is configured to measure a change in capacitance in response to a demodulated signal of the in-phase channel concurrently with measuring a non-coherent signal in response to a demodulated signal of the quadrature channel.

A weighing device includes: a weighing cell which weighs an article and outputs an original signal corresponding to the weight of the weighed article; a filter unit which performs a filtering process on the original signal output from the weighing cell; a controller which makes a waveform of a weighing signal subjected to the filtering process be displayed on a touch panel; and a storage unit which stores at least one of the original signal and the weighing signal, wherein the controller predicts and generates the waveforms of a plurality of weighing signals in a case of performing a plurality of filtering processes having different characteristics on the original signal or the weighing signal stored in the storage unit, and makes the waveforms of the plurality of weighing signals be displayed on the touch panel.

Changes over time in a measured impedance are displayed in an easy to identify manner. A measurement result display apparatus includes a processor that executes a measurement result display process that displays measurement results on a display 5 based on measurement result data produced by encoding impedances that have been measured by a measurement apparatus. During the measurement result display process, the processor displays, on the display 5 and based on a plurality of measurement result data of impedances that satisfy a predetermined comparison condition and were produced by the measurement apparatus at different measurement times, a measurement result display screen 20 with measurement result displays 21a to 21d (graphs) in which the impedances for respective measurement result data are aligned in order of measurement time.