Sonel MRU-30 Earth Resistance and Resistivity Tester CAT III

Measurements:

• earthing resistance using auxiliary electrodes,
• earthing resistance using auxiliary electrodes and clamp (for measurements of multiple earthing),
• earthing resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
• ground resistivity (Wenner method),
• continuity of equipotential bondings and protective
• conductors (meeting the requirements IEC 60364) with auto-zero function – with current 200mA.

Additionally:

• measurement of resistance of auxiliary electrodes RS and RH,  
• measurement of interference voltage,
• measurement in the presence of interference voltage in the power network                        
• with frequency 50Hz, 60Hz,
• selection of maximum measuring voltage (25V and 50V),
• introducing the distance between the electrodes for the resistivity in metres (m) and feet (ft),
• memory of 990 measurements (10 banks of 99 cells each),
• calibration of clamp used,
• data transmission to the computer (USB),
• indication of battery state.