Earth Resistance Resistivity Meter

Product Details:

Multifunctional earthing and soil resistivity meter The Sonel MRU-200-GPS earth resistance and soil resistivity meter allows the use of all known earth resistance measurement methods. This renders it an unrivalled measuring instrument in its category and definitely makes it stand out from other devices of its kind. Sonel MRU-200-GPS allows you to perform tests with the 3-pole and 4-wire method, using additional clamps (multiple earthing), as well as the two-clamp method and impulse method (earth impedance measurement).

The application of the two-core measurement method allows, under certain conditions, to perform earth resistance measurements without the use of auxiliary probes which are driven into the ground. The impact method, on the other hand, is used for diagnosing lightning protection earthing, but can also be used to measure extensive, multiple and connected earthing (including underground) without interfering with the circuit. With the use of the impact method it is possible to carry out measurements in accordance with EN 62305 - the need to measure earth impedance. It is worth noting that the instrument also has a built-in GPS receiver, which allows for recording the result along with the coordinates of the location. An additional function of the meter is the possibility of carrying out measurements of soil resistivity, continuity of protective and equalising connections and, with the use of clamps, also leakage or fault currents.

The high class of the device is confirmed by the excellent accuracy of the result it produces. The meter makes measurements in accordance with the EN 61557 standard starting from 0.100 Ω.

Measurement methods

• Impulse method – measurement of lightning protection systems with a measuring impulse ramp of 4/10 μs, 8/20 μs, 10/350 μs
• 3-pole and 4-wire method – measurement of earthing systems using auxiliary probes
• 3-pole method with clamp – measurement of earthing systems with multiple earth electrodes
• Two-clamp method – measurement of earthing system when the auxiliary probes cannot be used
• Earth resistivity – Wenner method
• Resistance of earth and compensatory conductors measured using current ≥200 mA with auto-zero function – meets the requirements of EN 61557-4
• Measurement of leakage current

Additional features

• Built-in GPS receiver – recording results with location coordinates 
• Measurement of resistance of auxiliary electrodes RS and RH
• Measurement of interference voltage
• Measurement of interference frequency
• Measurement in the presence of interference voltage generated by power networks with frequency of 16 2/3 Hz, 50 Hz, 60 Hz, 400 Hz
• Selection of maximum measuring voltage (25 V and 50 V)
• Automatic calculation of soil resistivity in ohm-meters (Ωm) and ohm-feet (Ωft)
• Memory of 990 measurement results (10 banks of 99 cells each)
• Calibration of clamp used
• Real time clock (RTC)
• Data transmission to the computer and mobile devices
• Battery indication

Application

• MRU-200-GPS meter was created for the most difficult working conditions. It generates a measuring current exceeding 200 mA, which provides effective measurements of grounding of energy objects such as transformer stations and power stations.
• Thanks to the methods using clamps, it is not necessary to disconnect the control connectors, which is sometimes a very tedious operation. This plays a special role when performing works on objects exposed to weather conditions, where the connecting elements are sometimes corroded or tarnished.

Product Details:

Multifunctional earthing and soil resistivity meter The Sonel MRU-200-GPS earth resistance and soil resistivity meter allows the use of all known earth resistance measurement methods. This renders it an unrivalled measuring instrument in its category and definitely makes it stand out from other devices of its kind. Sonel MRU-200-GPS allows you to perform tests with the 3-pole and 4-wire method, using additional clamps (multiple earthing), as well as the two-clamp method and impulse method (earth impedance measurement).

The application of the two-core measurement method allows, under certain conditions, to perform earth resistance measurements without the use of auxiliary probes which are driven into the ground. The impact method, on the other hand, is used for diagnosing lightning protection earthing, but can also be used to measure extensive, multiple and connected earthing (including underground) without interfering with the circuit. With the use of the impact method it is possible to carry out measurements in accordance with EN 62305 - the need to measure earth impedance. It is worth noting that the instrument also has a built-in GPS receiver, which allows for recording the result along with the coordinates of the location. An additional function of the meter is the possibility of carrying out measurements of soil resistivity, continuity of protective and equalising connections and, with the use of clamps, also leakage or fault currents.

The high class of the device is confirmed by the excellent accuracy of the result it produces. The meter makes measurements in accordance with the EN 61557 standard starting from 0.100 Ω.

Measurement methods

• Impulse method – measurement of lightning protection systems with a measuring impulse ramp of 4/10 μs, 8/20 μs, 10/350 μs
• 3-pole and 4-wire method – measurement of earthing systems using auxiliary probes
• 3-pole method with clamp – measurement of earthing systems with multiple earth electrodes
• Two-clamp method – measurement of earthing system when the auxiliary probes cannot be used
• Earth resistivity – Wenner method
• Resistance of earth and compensatory conductors measured using current ≥200 mA with auto-zero function – meets the requirements of EN 61557-4
• Measurement of leakage current

Additional features

• Built-in GPS receiver – recording results with location coordinates 
• Measurement of resistance of auxiliary electrodes RS and RH
• Measurement of interference voltage
• Measurement of interference frequency
• Measurement in the presence of interference voltage generated by power networks with frequency of 16 2/3 Hz, 50 Hz, 60 Hz, 400 Hz
• Selection of maximum measuring voltage (25 V and 50 V)
• Automatic calculation of soil resistivity in ohm-meters (Ωm) and ohm-feet (Ωft)
• Memory of 990 measurement results (10 banks of 99 cells each)
• Calibration of clamp used
• Real time clock (RTC)
• Data transmission to the computer and mobile devices
• Battery indication

Application

• MRU-200-GPS meter was created for the most difficult working conditions. It generates a measuring current exceeding 200 mA, which provides effective measurements of grounding of energy objects such as transformer stations and power stations.
• Thanks to the methods using clamps, it is not necessary to disconnect the control connectors, which is sometimes a very tedious operation. This plays a special role when performing works on objects exposed to weather conditions, where the connecting elements are sometimes corroded or tarnished.

Product Details:

Multifunctional earthing and soil resistivity meter The Sonel MRU-200-GPS earth resistance and soil resistivity meter allows the use of all known earth resistance measurement methods. This renders it an unrivalled measuring instrument in its category and definitely makes it stand out from other devices of its kind. Sonel MRU-200-GPS allows you to perform tests with the 3-pole and 4-wire method, using additional clamps (multiple earthing), as well as the two-clamp method and impulse method (earth impedance measurement).

The application of the two-core measurement method allows, under certain conditions, to perform earth resistance measurements without the use of auxiliary probes which are driven into the ground. The impact method, on the other hand, is used for diagnosing lightning protection earthing, but can also be used to measure extensive, multiple and connected earthing (including underground) without interfering with the circuit. With the use of the impact method it is possible to carry out measurements in accordance with EN 62305 - the need to measure earth impedance. It is worth noting that the instrument also has a built-in GPS receiver, which allows for recording the result along with the coordinates of the location. An additional function of the meter is the possibility of carrying out measurements of soil resistivity, continuity of protective and equalising connections and, with the use of clamps, also leakage or fault currents.

The high class of the device is confirmed by the excellent accuracy of the result it produces. The meter makes measurements in accordance with the EN 61557 standard starting from 0.100 Ω.

Measurement methods

• Impulse method – measurement of lightning protection systems with a measuring impulse ramp of 4/10 μs, 8/20 μs, 10/350 μs
• 3-pole and 4-wire method – measurement of earthing systems using auxiliary probes
• 3-pole method with clamp – measurement of earthing systems with multiple earth electrodes
• Two-clamp method – measurement of earthing system when the auxiliary probes cannot be used
• Earth resistivity – Wenner method
• Resistance of earth and compensatory conductors measured using current ≥200 mA with auto-zero function – meets the requirements of EN 61557-4
• Measurement of leakage current

Additional features

• Built-in GPS receiver – recording results with location coordinates 
• Measurement of resistance of auxiliary electrodes RS and RH
• Measurement of interference voltage
• Measurement of interference frequency
• Measurement in the presence of interference voltage generated by power networks with frequency of 16 2/3 Hz, 50 Hz, 60 Hz, 400 Hz
• Selection of maximum measuring voltage (25 V and 50 V)
• Automatic calculation of soil resistivity in ohm-meters (Ωm) and ohm-feet (Ωft)
• Memory of 990 measurement results (10 banks of 99 cells each)
• Calibration of clamp used
• Real time clock (RTC)
• Data transmission to the computer and mobile devices
• Battery indication

Application

• MRU-200-GPS meter was created for the most difficult working conditions. It generates a measuring current exceeding 200 mA, which provides effective measurements of grounding of energy objects such as transformer stations and power stations.
• Thanks to the methods using clamps, it is not necessary to disconnect the control connectors, which is sometimes a very tedious operation. This plays a special role when performing works on objects exposed to weather conditions, where the connecting elements are sometimes corroded or tarnished.

Product Details:

Multifunctional earthing resistance meter With the use of the presented earth resistance and soil resistivity meter Sonel MRU-120 it is possible to carry out earth resistance measurements using 3-pole and 4-wire method, measurements with the use of additional clamps (multiple earthing - without the necessity of unfastening the monitoring connections), as well as measurements using two-clamp method - in some cases it is possible to carry out the measurement without the necessity of using auxiliary probes driven into the ground. Sonel MRU-120 is a device designed to meet the needs of the power industry and used for earthing measurements - measuring range (measurements in accordance with EN 61557 standard) from 0.30 Ω. The functionality of the device is completed by the possibility to measure the resistivity of soil and the continuity of protective and equalising connections.

Measurement methods

• 3-pole and 4-wire method – measurement of earthing systems using auxiliary probes
• 3-pole method with clamp – measurement of earthing systems with multiple earth electrodes
• Two-clamp method – measurement of earthing system when the auxiliary probes cannot be used
• Soil resistivity – Wenner method
• Resistance of earth connection and equipotential bonding measured using current ≥200 mA with auto-zero function – meets the requirements of EN 61557-4

Additional features

• Measurement current of 200 mA – facilitates earth resistance measurements in difficult areas (sand, stony soil)
• Measurement of resistance of auxiliary electrodes RS and RH
• Measurement of interference voltage
• Measurement in the presence of interference voltage generated by power networks with frequency of 50 Hz and 60 Hz
• Selection of maximum measuring voltage (25 V and 50 V)
• Automatic calculation of soil resistivity in ohm-meters (Ωm) and ohm-feet (Ωft)
• Memory of 990 measurement results (10 banks of 99 cells each)
• Calibration of clamp used
• Real time clock (RTC)
• Data transmission to the computer
• Battery indication

Application

• MRU-120 meter was created for the most difficult working conditions. It generates a measuring current exceeding 200 mA, which provides effective measurements of grounding of energy objects such as transformer stations and power stations.
• Thanks to the methods using clamps, it is not necessary to disconnect the control connectors, which is sometimes a very tedious operation. This plays a special role when performing works on objects exposed to weather conditions, where the connecting elements are sometimes corroded or tarnished. The graphical user interface provides clear readings and explicit messages. This translates into quick, trouble-free service.

Protection and equipment

• Housing of MRU-120 ensures safe operation in field conditions and inside buildings. Ingress protection rating of IP54 protects the device against water and solids in case of splashes or dusty conditions. Moreover, the design of the device provides very good protection during transport and handling. Extensive standard equipment allows user to perform most measurements without the need to purchase additional accessories. MRU-120 is a versatile solution that offers comprehensive testing of earthing systems.

Product Details:

Possible measurements:

• earth resistance measurment with 3-pole method,
• measurement of continuity of equipotential bondings and protective conductors with auto-zero function - with current 200 mA,
• resistance measurement using 2-pole method.

Additional Information:

• Item Code: MRU21

Product Details:

Possible measurements:

• earth resistance measurment 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,

Additional Information:

• Item Code: MRU120

Product Details:

MRU-200 is the only meter in the market which uses all measurement methods.

Possible measurements:

• earth resistance measurment with 2-pole, 3-pole,4-pole method,
• impulse earth impedance measurement, two kinds of measuring impulse 4/10μs, 10/350μs,
• earth resistance measurement without disconnecting measured earths (using clamp),
• two clamps earth resistance measurement without auxiliary test probs,
• earth resistivity measurement,
• continuity measurement,
• leakage current measurement.

Additional Information:

• Item Code: MRU200

Product Details:

MRU-200-GPS is the only meter in the market which uses all measurement methods.

Possible measurements:

• earth resistance measurment with 2-pole, 3-pole,4-pole method,
• impulse earth impedance measurement, two kinds of measuring impulse 4/10μs, 10/350μs,
• earth resistance measurement without disconnecting measured earths (using clamp),
• two clamps earth resistance measurement without auxiliary test probs,
• earth resistivity measurement,
• continuity measurement,
• leakage current measurement.
• built in GPS,
• GPS coordinates of the measurement are stored in meter memory.

Additional Information:

• Item Code: MRU-200-GPS

Product Details:

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.

• Robust and weatherproof (IP65) - no ingress of dust, water protected by a nozzle against enclosure from any direction.
• Ergonomic casing - small and handy casing to make the measurements more convenient than before.
• Built-in rechargeable battery - saving time to replace flat batteries; can be recharged from Power Bank and Cigarette Lighter Socket!
• Clear on-screen notes - displayed on screen before and after the measurement to alert user of possible dangers and irregularities.
• Many measurement methods available in a small, portable casing.

Additional Information:

• Item Code: MRU30

Product Details:

MRU-10 is a simple meter that allows you to measure grounding by the use of the technical method and to measure grounding resistance by the use of the 2-pole method. The instrument is easy to handle, resistive to interference, and highly accurate. MRU-10  is a basic device that allows 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.