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Sonel MRU-10 Handheld Earth Resistance Meter CAT IV

It allows to:

  • measure earthing resistance using auxiliary electrodes,
  • measurement of resistance of auxiliary electrodes RS and RH,
  • measurement of interference voltage,
  • measurement in the presence of interference voltage in the power network with frequency 50 Hz and 60 Hz,
  • selection of maximum measuring voltage (25 V and 50 V),
  • indication of battery state.

Measurement of interference voltage UN (RMS)

Range Resolution Accuracy
0...100 V 1 V ±(10% m.v. + 1 digit)

Measurement of earthing resistance (method 3-pole)
measurement range to IEC 61557-5:2007: 0,53 Ω...9999 Ω (for 50 V)

Range Resolution Accuracy
0,00...19,99 Ω 0,01 Ω ±(3% m.v. + 3 digits)
20,0...199,9 Ω 0,1 Ω
200...1999 Ω 1 Ω ±5% m.v.
2000...9999 Ω 1 Ω ±8% m.v.
  • measurement current: under short circuit >20 mA,
  • voltage on open terminals: selectable 25 V AC or 50 V AC,
  • frequency of measurement current: 125 Hz (for networks 50 Hz) or 150 Hz (for 60 Hz),
  • selection of measuring frequency in settings.

Measurement of earthing resistance (method 2-pole)

Range Resolution Accuracy
0,01...19,99 Ω 0,01 Ω ±(3% m.v. + 3 digits)
20,0...199,9 Ω 0,1 Ω
200,0...1999 Ω 1 Ω ±5% m.v.
2000...9999 Ω 1 Ω ±8% m.v.

Measurement of earthing resistance (method 2-pole) RH and RS

Range Resolution Accuracy
0...999 Ω 1 Ω ±8% m.v.
1,00...9,99 kΩ 0,01 Ω
10,0...19,9 kΩ 0,1 Ω

Electric security:

  • type of insulation: double, according to EN 61010-1 and IEC 61557,
  • measurement category: CAT IV 150 V acc. to EN 61010-1,
  • protection class acc. to EN 60529: IP67.

Rated operational conditions:

  • operation temperature: -10...+50°C,
  • storage temperature: -20...+60°C,
  • humidity: 20...90%.

Other technical data:

  • LCD display: segment, backlit,
  • dimensions: 221 x 102 x 62 mm,
  • number of measurements (RE3P) carried out of set of batteries: > 3000

01556

Earth Resistance Testers

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