The Chauvin Arnoux CA6416 earth clamps delivered in a carrying case are ideal for quick earth-loop resistance measurements. 600V CAT IV, they display the earth voltage with a dangerous voltage alarm and provide additional safety during measurement. They are particularly easy to use thanks to ergonomic innovations such as a force compensation system to keep the clamp open without any effort and an OLED display, offering visibility over an angle of 180° whatever the lighting conditions. The automatic PRE-HOLD function when the clamp is opened and the automatic jaw calibration function at power-up help to optimize processing of the measurements provided by the clamps. They also allow users to display the impedance transposed to a frequency close to the network frequency, thus reducing measurement errors when low values are involved. On the same screen, they offer simultaneous display of the impedance and leakage current (O+A), the earth voltage and the breakdown of the resistive and inductive parts of the ground impedance.