SONEL MRU30 Earth Resistance and Resistivity Meter

The Sonel MRU-30 uses most known methods of earth resistance measurements. Tests can be performed using the 3-pole, 4-pole, 3-pole with auxiliary clamp and also, additionally, the MRU-30 employs the two clamp method of measurement, without the use of auxiliary test rods which can't be used in some situations. Complementary features of the MRU-30 are measurements of soil resistivity, continuity measurement of protective and equipotential conductors and, using clamps, leakage currents and interference voltages.

It allows to take the measurements of:
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.

In The Box
Earth contact test probe (rod); 0,3m (2 pcs)
Test lead with banana plug; 1,2m; red
Test lead with banana plug; 2,2m; black
Test lead on a reel with banana plug; 25m; red
Test lead on a reel with banana plug; 50m; yellow
Crocodile clip K01; black
Pin probe with banana plug; red
USB transmission cable
Sonel Reader software
Power supply adaptor Z7
Carrying case M9
Carrying case L10