The present disclosure provides a measurement probe comprising a probe tip for contacting a device under test, a probe handle that accommodates the probe tip at least in part, an electrical interface for coupling the measurement probe to a measurement device, and a switch comprising a control input, a first load input that is electrically coupled to the probe tip and a second load input that is electrically coupled to the electrical interface, wherein in a closed state the switch electrically closes the connection between the probe tip and the electrical interface, and in an open state electrically interrupts the connection between the probe tip and the electrical interface. The present disclosure also provides a respective method.

Herein is provided a device for optimizing bandwidth during oscilloscope measurements. The device is connectable to a probe for electrically connecting a test point and an oscilloscope. The device may include at least two grounding connectors with different inductances for electrically connecting ground to the probe and a tuning network comprising circuitry configured to compensate for the different inductances of said at least two grounding connectors, the tuning network being switchable between different modes, each mode being configured to compensate for a specific inductance of said at least two grounding connectors. A method for optimizing bandwidth during oscilloscope measurements is also provided.

A current sensor includes a current sense coil disposed about a conductive lead, the current sense coil configured to sense a current passing through the conductive lead. The current sense coil includes: a first outer coil configured to detect a first magnetic field generated by the current; a second outer coil configured to detect the first magnetic field, the second outer coil further configured to cancel an electrical field induced in the first outer coil; and an inner conductor disposed between the first outer coil and the second outer coil, the inner conductor configured to detect a second magnetic field generated by the current.

A high voltage phasing voltmeter comprises first and second probes. Each probe comprises an electrode for contacting a high voltage electrical conductor. The electrodes are connected in series with a resistor. A meter comprises a housing enclosing an electrical circuit for measuring true rms voltage. The electrical circuit comprises an input circuit for connection to the first and second probes and developing a scaled voltage representing measured voltage across the electrodes. A converter circuit converts the scaled voltage to a DC signal representing true rms value of the measured voltage. A peak hold circuit is connected to the converter circuit to hold a peak value of the true rms value. A display is connected to the peak hold circuit for displaying the peak value of the true rms value.

A browser probe has a probe body including a signal line, a nose of electrical insulating material integral with and projecting from the probe body, a pin supported by the probe body and electrically conductively connected to the signal line, a spring exerting a biasing force on the pin, an electrically conductive probe tip supported by the nose at a distal end of the nose remote from the probe body, and a plurality of discrete resistors interposed between the pin and the probe tip within the nose. The resistors are supported independently of another so as to be slidable within the nose. The probe tip is electrically conductively connected to the signal line via the resistors and the pin under the biasing force exerted by the spring.

An electrical outlet tester for testing a power outlet for powering a recreational vehicle includes outlet tester circuitry configured to test wiring of a power outlet for powering a recreational vehicle to detect a plurality of wiring conditions. The electrical outlet tester includes and a set of light indicators connected to the outlet tester circuitry so as to indicate each of the plurality of wiring conditions detectable by the outlet tester circuitry. The set of light indicators includes a first group of light indicators configured to indicate a plurality of fault condition types and a second group of light indicators configured to indicate one or more lines affected by the fault condition type indicated on the first group of light indicators. A housing surrounds the outlet tester circuitry and a plug extends from the housing and is configured to galvanically connect to the power outlet in order to facilitate testing thereof.

Various techniques are disclosed for providing electrical current and/or voltage sensor probes or tags integrated with measurement circuitry. For example, an electrical sensor is provided that includes a probe adapted to be arranged to at least partially encircle a conductor to be measured, wherein the probe has a proximal end and a distal end, the proximal end terminating in a base portion that houses measurement circuitry. The base portion may also include electrical components suitable for displaying, wirelessly transmitting, and/or otherwise conveying the measured electrical parameters. In some embodiments, the distal end of the probe may be removably received by the base portion, such that the probe forms a loop encircling the conductor when measuring it. In other embodiments, the probe may resiliently clip on to the conductor. In another example, an electrical sensor includes an attachable tag that can be mounted to the conductor to be measured.

A probe or accessory for use with an electrical test and measurement instrument can include an input to receive an input signal from a device under test (DUT), a clamp control unit or oscilloscope to apply a clamping/limiting level to the input signal to generate an output signal, and/or a control unit output port to provide the clamped/limited output signal to an oscilloscope.

The present application relates to a clamp meter and a clamp probe that can be matched for use with the clamp meter. The clamp meter comprises a main meter body having an interfacing connector and one or more clamp probes, wherein each of the clamp probes is detachably connectable to the interfacing connector of the main meter body. Each of the clamp probes has a converting unit that converts a signal measured by the clamp probe to an output measurement signal within a predetermined measurement range of the main meter body, and each of the clamp probes has an identity indicator readable by the main meter body. As the clamp meter according to the present application can be matched with a plurality of clamp probes having different measurement ranges, a user only needs to purchase one main meter body and one or more clamp probes of different models to meet various measuring needs. This can enhance the flexibility and extendibility of the usage of a clamp meter, as well as reduce the user's financial burden.

A measuring system for measuring signals with multiple measurement probes comprises a multi probe measurement device comprising at least two probe interfaces that each couple the multi probe measurement device with at least one of the measurement probes, a data interface that couples the multi probe measurement device to a measurement data receiver, and a processing unit coupled to the at least two probe interfaces that records measurement, values via the at least two probe interfaces from the measurement probes, wherein the processing unit is further coupled to the data interface and provides the recorded measurement values to the measurement data receiver, and a measurement data receiver comprising a data interface, wherein the data interface of the measurement data receiver is coupled to the data interface of the multi probe measurement device.