Kelvin Fish Clamp Test Line Wearresistant construction with easy plug and unplug operation for quick setup and reliable reusability. Fourwire method (Kelvin measurement): Also known as fourterminal measurement technology, this impedance measurement method in electronic circuits is primarily used for accurate measurement of resistor resistance. Wiring resistance impact: The voltage difference generated by wiring resistance is almost zero and does not affect voltage measurement results. Contact resistance: Since only a very small portion of the current flows through the voltmeter, it does not affect the current measurement results. Function and performance: Enables accuracy resistance measurements by eliminating lead and contact resistance errors, providing stable and dependable results in precision applications. Compatibility: Suitable for fourterminal measurement setups and common measurement instruments, facilitating integration into existing test rigs. Use scenarios: 1) Calibrating precision resistors in a laboratory to verify tight tolerance values. 2) Testing shunt resistors in power supplies or motor drives where accurate current sensing is required. 3) Performing incircuit impedance checks on RC networks during circuit debugging and development.