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MRU-200 Earth resistance and resistivity meter

MRU-200 is the unique meter in the market which uses all measurement methods (earth resistance measurement with 2-pole, 3-pole,4-pole method, selective earth resistance measurement with clamp (no influence from parallel earths; no opening of rusty junctions is needed), impulse earth resistance measurement, three kinds of measuring impulse 4/10 μs, 8/20 μs, 10/350 μs, two clamps earth resistance measurement without auxiliary test probs, earth resistivity measurement, leakage current measurement).

Manufacturer: SONEL S.A. (Poland).

Features
  • Measurement of resistance of auxiliary electrodes Rs and Rh
  • Measurement of interference voltage and frequency
  • Measurement in the presence of interference voltage in the power network with frequency 16 2/3 Hz, 50 Hz, 60 Hz and 400 Hz (with automatic selection of proper frequency of measuring signal or with manual selection)
  • Selection of maximum measuring voltage (25 V and 50 V)
  • 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
  • Real time clock (RTC)
  • Data transmission to the computer (USB)
  • Indication of battery state

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) (0,100 Ω...19,9 kΩ)

Range

Resolution

Accuracy

0,000...3,999 Ω

0,001 Ω

±(2% m.v. + 4 digits)

4,00...39,99 Ω

0,01 Ω

±(2% m.v. + 2 digits)

40,0...399,9 Ω

0,1 Ω

400...3999 Ω

1 Ω

4,00k...19,99 kΩ

0,01 kΩ

±(5% m.v. + 4 digits)

Measurement of earth connection and equipotential bonding (2P) (0,045 Ω...19,99 kΩ)

Range

Resolution

Accuracy

0,000...3,999 Ω

0,001 Ω

±(2% m.v. + 4 digits)

4,00...39,99 Ω

0,01 Ω

±(2% m.v. + 2 digits)

40,0...399,9 Ω

0,1 Ω

400...3999 Ω

1 Ω

4,00k...19,99 kΩ

0,01 kΩ

±(5% m.v. + 2 digits)

Measurement of resistance of auxiliary electrodes Rh and Rs

Range

Resolution

Accuracy

0...999 Ω

1 Ω

±(5% (Rs +Re +Rh) + 8 digits)

1,00...9,99 kΩ

0,01 kΩ

10,0...19,9 kΩ

0,1 kΩ

Measurement of multiple earthing resistance with using the clamp and auxiliary electrodes (3p + clamp) (0,120...1999 Ω)

Range

Resolution

Accuracy

0,000...3,999 Ω

0,001 Ω

±(8% w.m. + 4 digits)

4,00...39,99 Ω

0,01 Ω

±(8% w.m. + 3 digits)

40,0...399,9 Ω

0,1 Ω

400...1999 Ω

1 Ω

Measurement of multiple earthing resistance with using double clamps

Range

Resolution

Accuracy

0,00...19,99 Ω

0,01 Ω

±(10% m.v. + 3 digits)

20,0...149,9 Ω

0,1 Ω

±(20% m.v. + 3 digits)

Measurement of ground resistivity (Measurement method: Wenner, r=2pLRE)

Range

Resolution

Accuracy

0,0...199,9 Ω

0,1 Ω

depending on measurement accuracy Rе
with 4p method, but not less than ±1 digit

200...1999 Ω

1 Ω

2,0...19,99 kΩ

0,01 kΩ

20,0...99,9 kΩ

0,1 kΩ

100...999 kΩm

1 kΩ

Measurement of AC current (leakage)

Range

Resolution

Accuracy

0,1...99,9 mA

0,1 mA

±(8% m.v. + 5 digits)

100...999 mA

1 mA

±(8% m.v. + 3 digits)

1,00...4,99 A

0,01 A

±(5% m.v. + 5 digits)

5,00...9,99 A

0,01 A

±(5% m.v. + 5 digits)

10,0...99,9 A

0,1 A

100...300 A

1 A

Measurement of dynamic earthing resistance (Ro) with impulse wave method (4 )

Range

Resolution   

Accuracy

0,0...99,9 Ω

0,1 Ω

±(2,5% m.v. + 3 digits)

100...199 Ω

1 Ω

Standard accessories:

  • MRU-200
  • Test lead with banana plug; 1,2m; red
  • Test lead with banana plugs 2,2m; black
  • Test lead on a reel with banana plugs; 25m red
  • Test lead on a reel with banana plugs; 25m blue
  • Shielded test lead on a reel with banana plugs; 50m yellow
  • USB transmission cable
  • Charger for battery loading from the socket of car lighter (12 V)
  • Earth contact test probe (rod); 0,30 m - (4 pcs.)
  • Carrying case L2
  • Ni-MH battery package 4,8V 4,2Ah
  • Crocodile clip K01; black
  • Crocodile clip K02; red
  • Cramp
  • Power supply adaptor Z7
  • Cable for battery charger
  • Hanging straps

Optional accessories:

  • Hard carrying case
  • Earth contact test probe (rod); 0,80 m
  • Test lead with banana plugs 2 m (N-1)
  • Current clamp C-3 (Ø=52 mm)
  • Current clamp N-1 (Ø=52 mm)
  • Current flexible clamp (Rogowsky coil) F-1 (Ø=400 mm)
  • Battery case LR14 (size C)
  • Sonel Reports Plus software
  • Отсек для батареек LR14;
  • Carrying case L3
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