This disclosure provides systems, methods, and apparatus for implementing multiple test and measurement devices into a single multi-instrument device (102). The device can include at least one field programmable gate array, FPGA (112), that allows partial reconfiguration. One or more dynamic reconfigurable portions of the FPGA can be configured to function as one or more test and measurement devices. The device can provide outputs of each of the test and measurement instruments to a client device, which can display the outputs to a user. The device can be reconfigured by loading bitstreams (122,136) associated with the desired test and measurement device. The bitstreams can be loaded from the client device (104), a server (106), or from a memory storage unit (114) of the device itself.

A current detection apparatus includes a microcomputer. The microcomputer is configured to: detect a first current by using a first current sensor having a first current detection range; detect a second current by using a second current sensor having a smaller current detection error with respect to temperature change than the first current sensor and having a second current detection range different from the first current detection range and partially overlapping the first current detection range; calculate a correction value based on the second current that has been detected in a range in which the first current detection range and the second current detection range overlap with each other, and correct the first current by the correction value when using the first current for a detection current to be detected.

A measurement and control system comprises a housing and an electrical power distribution sub-system. The housing includes a plurality of addressable and programmable modules, a module rack that is expandable and having a length, and a main controller configured to communicate with the plurality of addressable and programmable modules. Each of the addressable and programmable module is installed on the module rack in a sequential configuration and is addressable based on a specific physical location of it across the length of the module rack. The main controller communicates with the plurality of addressable and programmable modules by addressing through a communication network. The electrical power distribution sub-system is configured to monitor inputs and signals from the each addressable and programmable module.

A voltage monitoring system having a microcontroller with an analog-to-digital converter with a first channel, and a memory device is provided. The microcontroller includes a monitoring application and a hardware abstraction layer. The monitoring application sends a first encoded channel number to the hardware abstraction layer. The hardware abstraction layer determines a first channel number based on the first encoded channel number, and obtains a measured voltage value associated with the first channel number. The hardware abstraction layer sends a second encoded channel number and the measured voltage value therein to the monitoring application. If the first encoded channel number is equal to the second encoded channel number, then the monitoring application stores the measured voltage value in the memory device.

A voltage monitoring system having a microcontroller with first and second monitoring applications and a hardware abstraction layer is provided. The hardware abstraction layer obtains a first measured voltage value associated with a first channel number. The hardware abstraction layer determines a second encoded channel number based on the first channel number. The hardware abstraction layer sends a first response message having the second encoded channel number and a first measured voltage value therein to the first monitoring application. The first monitoring application commands the microcontroller to generate first and second control signals to transition a contactor to an open operational state, if the second encoded channel number is not equal to a first expected encoded channel number.

Systems and methods are provided for compensating for parasitics in current measurements utilizing series current sense resistors. In one or more embodiments, the techniques include connecting a probe to a terminal of a circuit and a waveform measuring device. A waveform measuring device then acquires, through the probe, a voltage waveform. A virtual probe netlist is generated, where the netlist is descriptive of a series resistance and associated parasitics. A virtual probe processor converts, based on the virtual probe netlist, the voltage waveform to a current waveform representative of a current in the circuit.

A remote monitoring system and method for electricity demand of a fused magnesium furnace group. The system has a data acquisition device, a local PC, a cloud server and a remote PC. The data acquisition device has a voltage transformer, a current transformer, an active power transducer, a first slave computer, a plurality of multi-purpose electronic measuring instruments and a second slave computer. The method includes acquiring smelting current and smelting power of each fused magnesium furnace and electricity demand of the furnace group, controlling the switch off/on of each fused magnesium furnace according to the smelting current and the smelting power of each fused magnesium furnace and the electricity demand of the furnace group, sending basic monitoring data to the local PC, and achieving data exchange between the local PC and the remote PC through the Zookeeper technology.

A voltage monitoring system having a microcontroller with first and second monitoring applications and a hardware abstraction layer is provided. The hardware abstraction layer obtains a first measured voltage value associated with a first channel number. The hardware abstraction layer determines a second encoded channel number based on the first channel number. The hardware abstraction layer sends a first response message having the second encoded channel number and a first measured voltage value therein to the first monitoring application. The first monitoring application commands the microcontroller to generate first and second control signals to transition a contactor to an open operational state, if the second encoded channel number is not equal to a first expected encoded channel number

A voltage monitoring system having a microcontroller with an analog-to-digital converter with a first channel, and a memory device is provided. The microcontroller includes a monitoring application and a hardware abstraction layer. The monitoring application sends a first encoded channel number to the hardware abstraction layer. The hardware abstraction layer determines a first channel number based on the first encoded channel number, and obtains a measured voltage value associated with the first channel number. The hardware abstraction layer sends a second encoded channel number and the measured voltage value therein to the monitoring application. If the first encoded channel number is equal to the second encoded channel number, then the monitoring application stores the measured voltage value in the memory device.

A wire tracing system includes a voltage output source having a director circuit with a plurality of output channels. Each of the output channels outputs a unique voltage signature. A voltage reader/data recorder includes a conductive probe and a data memory that is partitioned into a plurality of data bins. Each of the data bins in the voltage reader/data recorder is associated with one of the voltage signatures output via the output channels of the director circuit, and each of the data bins is configured to store information associated with each of a plurality of wires to which the output channels are respectively connectable. The system and method permit a single individual to rapidly discover the identities of individual wires and cables without having to repeatedly travel back and forth between those extremities.