The disclosed technology relates to a probe for use with a test and measurement instrument. The probe includes a digital multimeter or voltmeter with an analog-to-digital converter configured to measure a signal from a device under test and determine a digital measurement from the signal, a controller connected to the multimeter or voltmeter configured to receive the digital measurement from the multimeter or voltmeter, a digital communication interface connected to the controller configured to communicate with the controller, and a communication link connected to the digital communication interface and the analog signal interface to communicate with the test and measurement instrument.

For decades, a mainstay of electrical and electronic testing has been the conventional use of the multi-meter that used a pair of probes to connect the Device Under Test to the meter. This often proves inadequate for present-day testing because more than one simultaneous or alternate reading or the connection of another testing tool and the reading of its effect on the DUT is often required. The Dual-Function Switch and Lead set (DFSL) of the present invention provides a switch and lead set interfacing two multi-meters, or one multi-meter and one test device or instrument with the DUT, while using the traditional and convenient pair of probes and a simple finger movement on the DFSL. The DFSL facilitates these tests, their safety and integrity, and reduces the time of many test procedures.

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. A plurality of sensor units may be networked and controlled by a remote control apparatus.

Analysis systems can include both a test and measurement tool for generating measurement data representative of at least one parameter of a device under test and an imaging tool for generating image data representative of a target scene. A processor in communication with the test and measurement circuit and the imaging tool can process measurement data and image data. Isolation circuitry can be configured to provide isolation between the imaging tool and the test and measurement circuit while permitting communication between the processor and each of the test and measurement tool and the imaging tool. A display for presenting measurement data and/or image data can be electrically isolated from the test and measurement tool.

Analysis systems can include both a test and measurement tool for generating measurement data representative of at least one parameter of a device under test and an imaging tool for generating image data representative of a target scene. An electrical isolation mechanism can electrically isolate a user operating the analysis tool from the test and measurement circuit through the imaging tool. The electrical isolation mechanism can include an insulating coating surrounding a part of the imaging tool having an opening proximate the imaging tool so that electromagnetic radiation can enter through the opening and reach the imaging tool. The opening can be sized so that a standard finger cannot penetrate the opening to within a predetermined distance of the imaging tool. Additionally or alternatively, a window positioned over the opening can prevent access to the imaging tool via the opening.

A measurement device and method includes a controller for controlling performance of a test on a test object, a signal generator for generating a signal indicative of an audible prompt to audibly identify a test result of the test object, and a signal transmitter for wirelessly transmitting the signal indicative of the audible prompt to a device remote from the measurement device.

A test lead assembly includes a first test lead having a first cable extending between a distal end and a proximal end, a first test probe attached to the distal end and a first plug attached to the proximal end; a second test lead having a second cable extending between a distal end and a proximal end, a second test probe attached to the distal end, and a second plug attached to the proximal end; and a fastener member for repeatedly releasably engaging at least a portion of the first cable with at least a portion of the second cable along a length of the first and second cables. The test lead assembly and a measurement device incorporating the test lead assembly can avoid or at least reduce knotting of the test leads.

A multi-meter including a current input, a common input, a display, a first current measurement circuit, a second current measurement circuit, and a controller. The controller includes a first input and a second input. The controller operable to receive a first voltage from the first current measurement circuit at the first input, receive a second voltage from the second current measurement circuit at the second input, determine a value for a current being measured based on the first voltage if the first voltage is below a predetermined threshold, determine a value for a current being measured based on the second voltage if the first voltage is above the predetermined threshold, generate an output signal related to the determined value for the current, and provide the output signal to the display.

A digital clamp meter includes a common input, a voltage/resistance input, a current transformer, a voltage/resistance measuring circuit, an AC measuring circuit, a MPU and a displayer. A detecting input of the voltage/resistance measuring circuit is connected to the voltage/resistance input, a detecting output of the voltage/resistance measuring circuit is connected to a signal input of the MPU, and a controlled terminal of the voltage/resistance measuring circuit is connected to a controlling output of the MPU. The signal output of the MPU is connected to the displayer. The common input is grounded. A detecting input of the AC measuring circuit is connected to a secondary winding of the current transformer, a detecting output of the AC measuring circuit is connected to the signal input of the MPU, and a controlled terminal of the AC measuring circuit is connected to the controlling output of the MPU.

A universal power probe fixture (UPPF) that is configured to be installed into a power signal path between a source device and a load device has one or more UPPF base modules, each UPPF base module including an input terminal block, an output terminal block, and a power transfer circuit including a multiple signal lines electrically connected between the input terminal block and the output terminal block, the signal lines structured to convey high power, and each of the signal lines includes a current probe connection point and at least one voltage probe connection point. The UPPF also has a source device connector adapted to electrically connect the source device to the input terminal block, and a load device connector adapted to electrically connect the load device to the output terminal block. A test system using the UPPF, and an application-specific electric vehicle motor probe adapter are also disclosed.