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Sonel MRU-200 Earth Resistance & Resistivity Meter

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MRU-200-X
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£2,616.00 £2,180.00
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Sonel MRU-200 Earth Resistance & Resistivity Meter

The Sonel MRU-200 Earth Resistance & Resistivity Meter is an earth tester that can utilise every measurement method to determine earth resistance. It is available with or without built-in GPS; please see the table below for further information.

SKU Title GPS Note
MRU-200 Sonel MRU-200 Earth Tester No -
MRU-200-GPS Sonel MRU-200 Earth Tester with GPS Yes GPS coordinates are saved with measurements 

 

The Sonel MRU-200 Earth Resistance & Resistivity Meter supports the following measurement methods and functions:

  • Earth resistance measurement using a 2-pole, 3-pole and 4-pole method
  • Selective earth resistance measurement using a clamp (no influence from parallel earth and the opening of junctions is not required)
  • Impulse earth resistance measurement with three kinds of measuring impulse: 4/10µs, 8/20µs and 10/350µs
  • Two-clamps earth resistance measurement without auxiliary test probes
  • Earth resistance using auxiliary electrodes and/or a clamp
  • Impulse earth resistance
  • Ground resistivity using the Wenner method
  • Resistance of auxiliary electrodes RS and RH
  • Leakage current
  • Current using a clamp or flexible clamp 
  • Continuity of equipotential bondings and protective conductors with an auto-zero function and 200mA current (meets the requirements of IEC 60364-6-61:2000 section 6.12.2)
  • Interference voltage
  • Interference frequency

*** Please note clamps are NOT included. ***

The Sonel MRU-200 Earth Resistance & Resistivity Meter's ability to measure earth resistance using auxiliary electrodes and a clamp means the user can take multiple earth measurements; while support for the double-clamp method is ideal when it is not feasible to use electrodes. Additionally, the Sonel MRU-200 Earth Resistance & Resistivity Meter can measure interference voltage in power networks with a frequency of 16 2/3Hz, 50Hz, 60Hz and 400Hz. The user can manually select the proper frequency or the Sonel MRU-200 Earth Resistance & Resistivity Meter can be set to configure this parameter automatically.  

Furthermore, the user can select the maximum measuring voltage (25V or 50V) and can enter the distance between the electrodes to measure the resistivity in metres (m) and/or feet (ft).

Up to 990 measurements can be saved to the Sonel MRU-200 Earth Resistance & Resistivity Meter (ten banks of ninety-nine cells). These measurements can be transferred to a computer via a Bluetooth or USB interface.

Finally, the Sonel MRU-200 Earth Resistance & Resistivity Meter also includes a battery-state indicator and a real-time clock.

The Sonel MRU-200 Earth Resistance & Resistivity Meter is a versatile earth tester with a real-time clock and an integrated memory as well as optional GPS.

Sonel MRU-200 Earth Resistance & Resistivity Meter Key Features

  • An earth tester that can utilise all measurement methods to determine earth resistance
  • Available with or without GPS
  • Earth resistance measurement using a 2-pole, 3-pole and 4-pole method
  • Selective earth resistance measurement using a clamp (no influence from parallel earth and the opening of junctions is not required)
  • Impulse earth resistance measurement with three kinds of measuring impulse: 4/10µs, 8/20µs and 10/350µs
  • Two-clamps earth resistance measurement without auxiliary test probes
  • Earth resistance using auxiliary electrodes and/or a clamp
  • Impulse earth resistance
  • Ground resistivity using the Wenner method
  • Resistance of auxiliary electrodes RS and RH
  • Leakage current
  • Current using a clamp or flexible clamp
  • Continuity of equipotential bondings and protective conductors with an auto-zero function and 200mA current (meets the requirements of IEC 60364-6-61:2000 section 6.12.2)
  • Interference voltage
  • Interference frequency
  • Can take multiple earth measurements using auxiliary electrodes and a clamp
  • Double-clamp method is ideal when it is not feasible to use electrodes
  • Measure interference voltage in power networks with a frequency of 16 2/3Hz, 50Hz, 60Hz and 400Hz
  • Manual or automatic setting of the proper frequency
  • Maximum measuring voltage: 25V or 50V
  • Enter the distance between the electrodes to measure the resistivity in metres and/or feet
  • Save up to 990 measurements (10 banks of 99 cells)
  • Transfer data to a computer via a Bluetooth or USB interface
  • Battery-state indicator
  • Real-time clock
  • A versatile earth tester with optional GPS

What’s Included?

  • Sonel MRU-200 Earth Resistance & Resistivity Meter with OPTIONAL GPS
  • 2m Test Lead with Banana Plug (Red)
  • 2m Test Lead with Banana Plug (Black)
  • 25m Test Lead on a Reel with Banana Plugs (Red)
  • 25m Test Lead on a Reel with Banana Plugs (Blue)
  • 50m Shielded Test Lead with Banana Plugs (Yellow)
  • USB Transmission Cable
  • Battery Vehicle Charger (12V)
  • 4x 0.3m Earth Contact Test Probe (rod)
  • Carrying Case
  • 8V, 4.2 Ah Ni-MH Battery Package
  • K01 Crocodile Clip (Black)
  • K02 Crocodile Clip (Red)
  • Cramp
  • Z7 Power Supply Adapter
  • Cable for Battery Charger
  • Hanging Straps
  • Calibration Certificate

Sonel MRU-200 Earth Resistance & Resistivity Meter Technical Specifications 

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 IP 54
Rated operational conditions
Operation temperature -10...+50°C
Storage temperature -20...+70°C
Humidity 20...90%
Other Technical Data 
LCD display graphic, backlighted
Interface USB und Bluetooth
Number of measurements carried out of set of batteries > 1200
Measurement of interference voltage
Range Resolution Accuracy
0...100 V 1 V ±(2% m.v. + 3 digits)
Measurement of interference frequency
Range Resolution Accuracy
15...450 Hz 1 Hz ±(1% m.v. + 2 digits)
Measurement of earthing resistance (method 3- and 4-pole)
Note  measurement range to IEC 61557-5: 0,100 Ω...19,9 kΩ
Range Resolution Accuracy
0,000...3,999 Ω 0.001Ω ±(2% m.v. + 4 digits)
4,00...39,99Ω 0.01Ω ±(2% m.v. + 2 digits)
40,0...399,9Ω 0.1Ω
400...3999Ω
4,00k...19,99kΩ 0.01kΩ ±(5% m.v. + 2 digits)
Measurement of earth connection and equipotential bonding (2P)
Note range of measurements in accordance with IEC 61557-4: 0,045 Ω...19,99 kΩ
* - in range 0,000…0,045 Ω the accuracy is not specified.
Range Resolution Accuracy
0.000...3.999Ω 0.001Ω ±(2% m.v. + 4 digits)
4.00...39.99Ω 0.01Ω ±(2% m.v. + 2 digits)
40.0...399.9Ω 0.1Ω
400...3999Ω
4.0...19.99kΩ 0.01kΩ ±(5% m.v. + 2 digits)
Measurement of resistance of auxiliary electrodes RH and RS
Range Resolution  Accuracy
0...999Ω ±(5% (R +R +R ) + 8 ) S E H digits
1.00...9.99 kΩ 0.01kΩ
10,0...19.9kΩ 0.1kΩ
Measurement of multiple earthing resistance with using the clamp and auxiliary
electrodes (3p + clamp)
Note measurement range to IEC61557-5: 0,120...1999 Ω
Range  Resolution  Accuracy
0.000...3.999Ω 0.001 ±(8% m.v. + 4 digits)
4.00...39.99Ω 0.01 ±(8% m.v. + 3 digits)
40.0...399.9Ω 0.1
400...1999Ω 1
Measurement of multiple earthing resistance with using double clamps
Range Resolution Accuracy
0.00...19.99 0.01Ω ±(10% m.v. + 3 digits)
20.0...149.9Ω 0.1Ω ±(20% m.v. + 3 digits)
Measurement of ground resistivity
Note Measurement method: Wenner, r=2pLR
Measurement method: Wenner, r=2pLRE
Range Resolution Accuracy
0,0...199.9Ωm 0.1Ωm depending on measurement
accuracy R with 4p method, E
but not less than ±1 digit
200...1999Ωm 1Ωm
2.00...19.99kΩm 0.01kΩm
20.0...99.9kΩm 0.1kΩm
100...999kΩm 1kΩm
Measurement of AC current (leakage)
Notes 1 – receiving clamp (diameter 52 mm) – C-3
2 – flexible clamp (Rogowsky coil) with diameter 400 mm – F-1
Range Resolution Accuracy
0.1...99.9 mA 1 0.1 mA ±(8% m.v. + 5 digits)
100...999 mA 1 1 mA ±(8% m.v. + 3 digits)
1.00...4.99 A 1, 2 0.01 A ±(5% m.v. + 5 digits) 1
unspecified 2
5.00...9.99 A 1, 2 0.01 A ±(5% m.v. + 5 digits)
10.0...99.9 A 1, 2 0,1 A
100...300 A 1, 2 1 A
Measurement of dynamic earthing resistance (R ) with impulse wave method (4 )
Note choice impulse edges: 4/10 ms, 8/20 µs, 10/350 ms
Range Resolution Accuracy
0.0...99.9Ω 0.1Ω ±(2,5% m.v. + 3 digits)
100...199Ω
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