An apparatus for a system power device utilized in an interconnected power system. The interconnected power system may include multiple system power devices connected to various inter connections of groups of direct currents (DC) from power sources which also may be connected in various series, parallel, series parallel and parallel series combinations for example. The apparatus may include a processor connected to a memory and a communication interface operatively attached to the processor. The communication interface may be adapted to connect to a mobile computing system of a user in close proximity to the system power devices. A graphical user interface (GUI) of the mobile computing system may allow various operational and re-configuration options for the interconnected power system which may include installation, maintenance and monitoring schedules in the interconnected power system when the user of the GUI is in close proximity to the system power devices.

In one implementation, a circuit can include a reference pin and an operational amplifier that can include an output pin, an inverting input pin and a non-inverting input pin. The inverting input pin can be electrically coupled to the output pin via a first impedance and to the reference pin via a second impedance. The non-inverting input pin can be electrically coupled to the reference pin via a third impedance and can be configured to receive a detection signal. The reference pin can be configured to receive a detection reference signal associated with the detection signal.

An apparatus for a system power device utilized in an interconnected power system. The interconnected power system may include multiple system power devices connected to various inter connections of groups of direct currents (DC) from power sources which also may be connected in various series, parallel, series parallel and parallel series combinations for example. The apparatus may include a processor connected to a memory and a communication interface operatively attached to the processor. The communication interface may be adapted to connect to a mobile computing system of a user in close proximity to the system power devices. A graphical user interface (GUI) of the mobile computing system may allow various operational and re-configuration options for the interconnected power system which may include installation, maintenance and monitoring schedules in the interconnected power system when the user of the GUI is in close proximity to the system power devices.

This present invention relates to an electric testing assistance tool in the form a wire nut or electrical connector. The tool is a funnel shaped flame resistant and insulating device and has a top end and a bottom end with curved walls. The top end includes a central hole to receive a testing probe of a tester device. The device has an internal metal spiral thread connected to a metal ball connector. The metal spiral thread twistable about a plurality of wire end leads. The leads extending from the bottom end opening are connected to a target wiring whose electrical parameters and continuity is to be measured using the electric testing assistance tool. The testing probe can be inserted through the central hole to contact the metal ball to measure the electric parameters and continuity of the target wiring.

The invention relates to a measuring device such as a multimeter, comprising a retractable assembly, and including (i) a cable comprising a first end portion having a first probe and a second end portion having a second probe; (ii) a reel comprising a rotatable hub adapted to wind up and unwind said cable; and (iii) a circuit in connection with said cable, the circuit being adapted to wirelessly communicate a signal measured by the first probe or the second probe to a remote location; wherein the circuit is rotatable in conjunction with said rotatable hub.

Systems, methods, and a computer readable medium are provided herein for providing an indication of a connection terminal on a measurement device for use in performing a test of a target device. The system can include a target device and a measurement device. The measurement device can couple to the target device via a plurality of connection terminals to perform a test of the target device. The measurement device can receive an input identifying a test to be performed on the target device by the measurement device. The measurement device can determine, based on the received input, an indication identifying at least one connection terminal of the plurality of connection terminals to connect to the target device to perform the test. The measurement device can provide the indication of the at least one connection terminal via an indication mechanism associated with the at least one connection terminal.

This present invention relates to an electric testing assistance tool in the form a wire nut or electrical connector. The tool is a funnel shaped flame resistant and insulating device and has a top end and a bottom end with curved walls. The top end includes a central hole to receive a testing probe of a tester device. The device has an internal metal spiral thread connected to a metal ball connector. The metal spiral thread twistable about a plurality of wire end leads. The leads extending from the bottom end opening are connected to a target wiring whose electrical parameters and continuity is to be measured using the electric testing assistance tool. The testing probe can be inserted through the central hole to contact the metal ball to measure the electric parameters and continuity of the target wiring.

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.

Systems, methods, and a computer readable medium are provided herein for providing an indication of a connection terminal on a measurement device for use in performing a test of a target device. The system can include a target device and a measurement device. The measurement device can couple to the target device via a plurality of connection terminals to perform a test of the target device. The measurement device can receive an input identifying a test to be performed on the target device by the measurement device. The measurement device can determine, based on the received input, an indication identifying at least one connection terminal of the plurality of connection terminals to connect to the target device to perform the test. The measurement device can provide the indication of the at least one connection terminal via an indication mechanism associated with the at least one connection terminal.

The invention involves a multimeter with a meter probe module and phasing probe module capable of wireless communication, proximity measurements, and accurately reading phase degrees. The meter probe module and the phasing probe module can communicate wirelessly, via a wired cable interface, or any combination thereof. The meter probe module and phasing probe module have unique radio frequency serial numbers that allow the probe modules to only communicate with its paired partner probe module while ignoring all other probe modules. The multimeter has a measurement point capable of taking direct contact measurements. The multimeter also has a measurement point capable of taking a voltage measurement without directly contacting the object to be measured. This is accomplished by taking voltage readings from the electric field of the air surrounding said object. The improved multimeter may allow an operator to more safely gather accurate information about an object being measured.