Abstract: A calibrator lead set, which electrically couples a first device and a second device during calibration of the second device, includes a cable having multiple wires, a first interface connector coupled to a first end of the wires of the cable, and a plurality of second interface connectors coupled to a second end of the wires that is opposite the first end of the wires. The first interface connector includes a connector retaining portion, multiple connection terminals extending from the connector retaining portion, and a sheath extending from the connector retaining portion and surrounding the connection terminals extending from the connector retaining portion. The sheath may be transparent to facilitate positioning of the connection terminals of the first interface connector. The second interface connectors may include a first sheathed, double banana plug connector and a second sheathed, double banana plug connector stackable on the first sheathed, double banana plug connector.

Abstract: A platinum resistance temperature sensor having a housing that contains a platinum member. The housing includes a first substrate having a first support and a second support spaced apart from an upper surface of the first substrate. The first support of the first substrate supports a first portion of the platinum member and the second support supports a second portion of the platinum member. Medial portions of the platinum member are suspended over the upper surface of the first substrate between the first support and the second support.

Abstract: A pulse width modulation (PWM) digital-to-analog conversion circuit includes switches 102, 104, 114, 116 controlled by a first PWM signal, and switches 106, 108, 110, 112 controlled by a second PWM signal. A first operational amplifier (op-amp) includes a first input coupled to an output of a filter, and a second input coupled to an output of the first op-amp. During a first time period, an output of a second op-amp is coupled to an input of the filter via switches 102 and 104, and an output of a third op-amp is coupled to the output of the first op-amp via switches 114 and 116. During a second time period, the output of the second op-amp is coupled to the output of the first op-amp via switches 106 and 108, and an output of the third op-amp is coupled to the input of the filter via switches 110 and 112.

Abstract: A socket tester device includes an electrical plug that is to be inserted into an electrical socket, a tester circuit electrically coupled to the electrical plug, a sound emitting device, a communication device, a processor, and a memory. The tester circuit outputs one or more signals indicating a wiring condition of the electrical socket into which the electrical plug is inserted. The memory stores instructions that, when executed by the processor, cause the processor to receive the one or more signals indicating the wiring condition of the electrical socket into which the electrical plug is inserted, control the communication device to wirelessly transmit a first message that includes data indicating the wiring condition of the electrical socket into which the electrical plug is inserted, and control whether the sound emitting device emits one or more sounds.

Abstract: An amplifier circuit includes: a Schmidt trigger having an input electrically coupled to an input of the amplifier circuit, a switching network electrically coupled to an output of the Schmidt trigger, an inductor electrically coupled to the switching network, a first resistor electrically coupled to the inductor, a capacitor electrically coupled to the first resistor, a first feedback circuit that provides a first feedback signal to the input of the Schmidt trigger based on a voltage at a first node electrically coupled to the first resistor and to the capacitor, a second resistor electrically coupled to the output of the amplifier circuit, a third resistor electrically coupled to the second resistor, and a second feedback circuit that provides a second feedback signal to the input of the Schmidt trigger based on a voltage at a second node electrically coupled to the second resistor and to the third resistor.

Abstract: A testing device configured to operate as a dedicated tool for testing motor drives and motor shafts guides a user (such as a test engineer or a technician) through the steps of testing the motor drive and shaft. The testing device is configured to output testing results to the user. By configuring the testing device to output specific motor drive and shaft measurement results and by guiding a user through the steps of performing the measurement, operation of the testing device is simplified.

Abstract: A method for expanding the dynamic range of a capacitive pressure sensor and a capacitive pressure sensor having an expanded dynamic range are provided. The capacitive pressure sensor may comprise capacitive plates. At least one plate may be contoured to increase a surface area exposed to the other of the capacitive plates. The capacitive pressure sensor may comprise a diaphragm that is movably responsive to pressure. The diaphragm may have a hollowed volume within an interior of the diaphragm operative to increase a flexibility of the diaphragm in response to the pressure. The capacitive pressure sensor may be one of a plurality of capacitive pressure sensors in a pressure sensing device. The capacitive pressure sensors may have different capacitive responses and may each output a pressure measurement, whereby the device may select a pressure measurement to output based at least in part on the capacitive responses.

Abstract: Systems and methods provide a non-contact current measurement system which operates to measure alternating current flowing through an insulated wire without requiring galvanic contact with the insulated wire. The measurement system may include a magnetic field sensor that is selectively positionable proximate an insulated wire under test. In operation the magnetic field sensor detects a magnetic field generated by the current flowing in the insulated wire. Using an adjustable clamp assembly, the measurement system provides control over the mechanical positioning of the insulated wire relative to the magnetic field sensor to ensure consistent measurements. The non-contact current measurement system may determine information relating to the physical dimensions (e.g., diameter) of the insulated wire.

Abstract: Systems and methods for measuring DC voltage of an insulated conductor (e.g., insulated wire) are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-contact DC voltage measurement device may include a conductive sensor that is mechanically oscillated. The device may also include a conductive internal ground guard that is galvanically isolated from the conductive sensor, and a conductive reference shield that is galvanically insulated from the internal ground guard. The device may further include a common mode reference voltage source that generates an alternating current (AC) reference voltage, and a sensor signal measurement subsystem electrically coupled to the conductive sensor. Control circuitry may receive a sensor current signal from the sensor signal measurement subsystem, and determine the DC voltage in the insulated conductor based at least in part on the received sensor current signal.

Abstract: Systems and methods directed toward acoustic analysis can include an acoustic sensor array comprising a plurality of acoustic sensor elements, an electromagnetic imaging tool, and a processor in communication with the acoustic sensor array and the electromagnetic imaging tool. The processor can be configured to analyze acoustic data to extract one or more acoustic parameters representative of acoustic signals at one or more locations in an acoustic scene and generate a display image that includes electromagnetic image data and acoustic image data. The display image can further include information indicative of the one or more acoustic parameters at one or more locations in the acoustic scene, such as including acoustic image data in the display image at locations in the scene at which the one or more acoustic parameters satisfies a predetermined condition.

Abstract: Systems and methods can be used for analyzing image data to determine an amount of vibration and/or misalignment in an object under analysis. In some instances, as operating equipment heats up during operation, temperature changes of various portions of the operating equipment leads to changes in dimensions of such portions, leading to misalignment. Multiple sets of data representative of the operating equipment in multiple operating conditions can be used to determine an amount of misalignment due to thermal offsets. Hot and cold temperatures of the equipment can be used to calculate thermal growth of various portions of the equipment, which can be used to determine an amount a misalignment due to thermal offsets. Additionally or alternatively, image data representing the equipment can be used to observe changes in alignment between states.

Abstract: An electronic measuring device includes a main printed circuit assembly and one or more channel modules. At least one channel module includes a channel printed circuit board and a first insulating housing that defines a cavity covering at least part of electrical elements mounted on the channel printed circuit board. A first conductive shielding frame is placed on the first insulating housing and is separated from the channel printed circuit board by the first insulating housing. The first conductive shielding frame covers the electrical elements mounted on the channel printed circuit board. A second insulating housing sandwiches the first conductive shielding frame between the second insulating housing and the first insulating housing which lengthens an electrical path from the first conductive shielding frame to the channel printed circuit board.

Abstract: A Rogowski coil in a sensor unit has voltage induced by a conductor surrounded by the Rogowski coil. The voltage is integrated to represent current which is converted to digital data representing current in the conductor and sent wirelessly to a multimeter. The sensor unit may receive control signals from the multimeter and a remote control apparatus. A plurality of sensor units may be networked and controlled by the remote control apparatus.