The KEW-4200 True RMS earth resistance clamp has the noise check function: This function is for current detection, which affects an earth resistance measurement and displays "NOISE" on the LCD. It also has a memory function for up to 100 measured values. The earth resistance of 0.05 to 1500 ohm can be measured without additional ground tips. (Multi-earth system) Note: A single ground cannot be measured. (Only for multi-earth system) https://elecena.pl/product/18426600/kew-4200-insulation-and-earth-testing-device 2021-05-11 https://elecena.pl/product/18426600/kew-4200-insulation-and-earth-testing-device 2021-06-19 https://elecena.pl/product/18426600/kew-4200-insulation-and-earth-testing-device 2023-07-07 https://elecena.pl/product/18426600/kew-4200-insulation-and-earth-testing-device 2025-09-08