- Description
Easy way to measure earthing and soil
The Sonel MRU-12 earth resistance and soil resistivity meter is a simple meter that allows you to measure grounding by the use of the technical method (3-pole and 4-wire) and soil resistivity by Wenner and Schlumberger method. The instrument is easy to handle, resistive to interference, and highly accurate.
MRU-12 is a basic device that allows for checking the quality of the grounding system on the basis of the received measurement result. Its ergonomic shape, durable and firm housing, as well as big and clear display make this instrument ideal to use both in the field and most working environments.
The device is simple to operate and intuitive. It is the best choice for electrical installations contractors, technicians, and professionals dealing with grounding measurements.
Sonel MeasureEffect™
The meter is a part of the Sonel MeasureEffect™ platform. It is a comprehensive system that enables you to take measurements, store and manage data, and provides multi-level control of your instruments.
Measurement methods
- 3-pole and 4-wire method – measurement of earthing systems using auxiliary probes
- 2-pole method
- Earth resistivity – Wenner and Schlumberger method
Additional features
- Resistance of auxiliary electrodes RH and RS
- Measurement of interference voltage to 100 V
- Indication of battery state
- Selection of maximum measuring voltage (25 V and 50 V)
- Auto-OFF function
- In ground resistivity measurements, distances between electrodes can be input in meters (m) or feet (ft)
- Memory of 990 measurement results (10 banks of 99 cells each)
- Technical specification
Measurement functions Measurement range Display range Resolution Accuracy Interference voltage 0 V…100 V 0 V…100 V 1 V ±(10% m.v. + 1 digit) Earth resistance 2-pole method 0.00…9999 Ω 0.00…9999 Ω from 0 0.01 Ω from ±(3% m.v. + 3 digits) 3-pole and 4-wire method 0.53…9999 Ω acc. to EN 61557-5 0.00…9999 Ω from 0 0.01 Ω from ±(3% m.v. + 3 digits) auxiliary electrodes resistance 0 Ω…19.9 kΩ 0 Ω…19.9 kΩ from 0 1 Ω ±(5% + 8 digits) Earth resistivity Wenner method 0.0 Ωm…999 kΩm 0.0 Ωm…999 kΩm from 0.1 Ωm Depends on the accuracy of the RE 4p measurement, but not less than ±1 digit Schlumberger method 0.0 Ωm…999 kΩm 0.0 Ωm…999 kΩm from 0.1 Ωm Depends on the accuracy of the RE 4p measurement, but not less than ±1 digit “m.v.” - measured value
- Standard accessories
- Optional accessories
- Files
- Sonel MeasureEffect (2.26.2.127)changelog
Changes in version 2.26.2.127 compared to the previous version:
- Added a service to import external data from MPI-540 family meters.
- Introduced a wizard for advanced measurement procedures.
- Introduced PIN code login for local accounts.
- Introduced automatic bidirectional linking of resource folders.
- Added the MPI-515/516 meter.
Changes in version 1.25.4.146 compared to the previous version:
- Added MRU-12 support.
- UI improvements.
- Security fixes.
Changes in version 1.25.3.016 compared to the previous version:
- Improved mobile app performance.
- Interface optimization.
- Added PV and insulation resistance measurement reports.
- Added the ability to share measurement data structure.
Changes in version 1.25.2.008 compared to the previous version:
- Enabling the MeasureEffect service.
- Adding collaboration with the MeasureEffect mobile app.
- Added online updates.
- Other minor improvements.
- Sonel MeasureEffectchangelog
Changes in version 1.26.1.XXX:
- Improved result handling and presentation for the MRU-12 meter.
- General improvements to user experience (UX) and application stability.
- Key data security fixes.
- Firmware MRU-12 (1.10)changelog
Changes in version 1.10 compared to the previous one:
- Improved operation with the MeasureEffect application.
Changes in version 1.05 compared to the previous one:
- Support for MeasureEffect system.
Changes in version 1.03 compared to the previous one:
- Optimisation of interference voltage measurement.
