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4 wire resistance sensors are mostly applied in lab settings where high accuracy is necessary. This circuit is useful because it can correct inaccuracies brought on by longer wire lengths between the measuring element and the measurement electronics.
On either side of the sensing element, two wires connect it to the monitoring device. The measurement current is delivered by one set of wires, while the voltage drop across the resistor is measured by the other set.
In recent years, manufacturers have been moving large vehicles such as buses and trucks to electric drivetrains, creating demand for the ability to measure currents in excess of 1000 A.In addition, adoption of SiC/GaN elements in inverters is driving increases in power conversion unit switching speeds (on/off cycle speeds) and efficiency.
Consequently, the industry demands current sensors that can measure large currents with greater precision over a wider band of frequencies and in a broader range of operating temperatures than ever before.
The global 4 wire resistance sensor market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
Another new interface board for its CableEye cable and harness testing equipment has been announced by CAMI Research Inc. Users can utilize it to experimentally ascertain whether the HVX optional, add-on, 4-Wire measuring feature needs calibration by populating it with precision resistors.
The entire CableEye product line, including connector boards, is available from CAMI. The number of these test fixture boards is currently over 60, and the majority of them are filled with different “families” of connectors. Similar to a typical connector board, the CB52 connects to the tester.
The CB52, which is offered as a SINGLE board, includes a set of eleven precision low-value resistors for comparing measurements to the calibrated values of the system. The precise resistor values cover a wide enough range to guarantee an accurate calibration with absolute certainty.
The Kelvin 4-wire resistance measuring module is an optional add-on module that may be purchased with any new hipot system or upgraded to a higher model by adding the CB52 to an existing high voltage tester. Running the verification check at least once every three months is advised by CAMI to maintain the accuracy of 4-wire resistance measurements.
Unreliable data will be produced by a 4-wire measurement module that is out of calibration. Resistance readings will occasionally, if not always, be off. As a result, something could pass when it ought to fail or fail when it ought to pass. In other words, faulty measurements will result in tainted product yield.
Hioki is pleased to announce the launch of the AC/DC Current Sensor CT6877, a pass-through current sensor capable of measuring large currents of up to 2000 A AC/DC with a high degree of precision. The addition of the CT6877 (rated for 2000 A) to the line provides another option for customers in the form of support for a broader range of research and development applications.
In addition to its ability to measure large currents, the sensor has a wide frequency band and excellent noise resistance, prerequisites for properly evaluating inverters (devices that convert DC to AC) used in electric vehicles (EVs) and hybrid vehicles (HEVs), a class of devices that continue to move toward ever larger currents and higher-frequency switching.
Pass-Through Current Sensor Measures 2000 A AC/DC at High Precision, Making them Ideal for Evaluating EV/HEV Inverters that Exhibit Increasingly Large Currents.Hioki is pleased to announce the launch of the AC/DC Current Sensor CT6877, a pass-through current sensor capable of measuring large currents of up to 2000 A AC/DC with a high degree of precision.
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