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Sonel MRU-120 Earth Resistance and Resistivity Tester - CAT IV

Ground Resistance Tester with 3 or 4 pole and clamp methods


Earth resistance measurement with 3-pole,4-pole method,
Earth resistance measurement without disconnecting measured earths (using clamp),
Continuity of equipotential bondings and protecting conductors
Two clamps earth resistance measurement without auxiliary test probs,
Earth resistivity measurement,

It allows to take the measurements of:

Earth resistance using auxiliary electrodes,
Earth resistance using auxiliary electrodes and clamp (for measurements of multiple earth)
Earth resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
Ground resistivity (Wenner method),
Measurement of continuity of equipotential bondings and protective conductors (meeting the requirements of IEC 60364 - 6-61:2000 section 6.12.2) with auto-zero function – with current 200 mA.


Measurement of resistance of auxiliary electrodes RS and RH,
Measurement of interference voltage,
Measurement of interference frequency,
Measurement in the presence of interference voltage in the power network with frequency 50 Hz, 60 Hz
Selection of maximum measuring voltage (25 V and 50 V)
Introducing the distance between the electrodes for the resistivity in metres (m),
Memory of 990 measurements (10 banks of 99 cells each),
Calibration of clamp used,
Real time clock (RTC),
Data transmission to the computer (USB, wireless),
Indication of battery state.

Electric security:

Type of insulation: double, according to EN 61010 - 1 and IEC 61557
Measurement category: CAT IV 300 V acc. to EN 61010 - 1
Protection class acc. to EN 60529: IP54

Earth & Ground Resistance Testers


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