Earth Resistance and Resistivity Meter MRU-200 with impulse method

Brand: Sonel
Product code: WMGBMRU200
Price:
1.814,00 €excl. VAT
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.
 
 
 
 

It allows to take the measurements of:

  • earth resistance using auxiliary electrodes,
  • earth resistance using auxiliary electrodes and clamp (for measurements of multiple earthing)
  • earth resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
  • impulse earth impedance (without disconnecting measured earthing),
  • ground resistivity (Wenner method),
  • current using the clamp (e.g. leakage) and flexible clamp (Rogowsky coil),
  • measurement of continuity of equipotential bondings and protective conductors (meeting the requirements of IEC 60364-6-61:2000 section 6.12.2) with auto-zero function – with current 200mA.

Additionally:

  • measurement of resistance of auxiliary electrodes RS and RH,
  • measurement of interference voltage,
  • measurement of interference frequency,
  • measurement in the presence of interference voltage in the power network
    with frequency 16 2/3 Hz, 50Hz, 60Hz and 400Hz (with automatic selection of proper frequency of measuring signal or with manual selection),
  • selection of maximum measuring voltage (25V and 50V)
  • 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.
Electric security:
- type of insulation: double, according to EN 61010-1 and IEC 61557
- measurement category: CAT IV 300V acc. to EN 61010-1
- protection class acc. to EN 60529: IP54

Rated operational conditions:
- operation temperature: -10...+50°C
- storage temperature: -20...+70°C
- humidity: 20...80%

Other technical data:

- LCD display: graphic, backlighted
- interface: USB
- number of measurements carried out of set of batteries: > 1200
- warranty: 36 months

 

Measurement of interference voltage

Range Resolution Accuracy
0...100V 1V ±(2% m.v. + 3 digits)

Measurement of interference frequency

Range Resolution Accuracy
15...450Hz 1Hz ±(1% m.v. + 2 digits)

Measurement of earthing resistance (method 3- and 4-pole)
measurement range to IEC61557-5: 0,100Ω...19,9kΩ

 

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 0,001kΩ
4,00k...19,99kΩ 0,01kΩ ±(5% m.v. + 2 digits)


Measurement of continuity of equipotential bondings and protective conductors (Rcont)
measurement range to IEC61557-4: 0,045Ω...19,99kΩ

 

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 0,001kΩ
4,00k...19,99kΩ 0,01kΩ ±(5% m.v. + 2 digits)

Measurement of resistance of auxiliary electrodes RH and RS

 

Range Range Accuracy
0...999Ω
±(5% (RS+RE+RH) + 8 digits)
1,00k...9,99kΩ 0,01kΩ
10,0k...19,9kΩ 0,1kΩ

Measurement of multiple earthing resistance with using the clamp and auxiliary
electrodes (3p + clamp)
measurement range to IEC61557-5: 0,120Ω...1,99kΩ

 

Range Resolution Accuracy
0,000...3,999Ω* 0,01Ω ±(8% m.v. + 4 digits)
10,0...99,9Ω 0,01Ω ±(8% m.v. + 3 digits)
100...999Ω 0,1Ω
1,00k...1,99kΩ
* - in range 0,000…0,045Ω the accuracy is not specified.

Measurement of multiple earthing resistance with using double clamps

 

Range Resolution Accuracy
0,00...19,99Ω 0,1Ω ±(10% m.v. + 3 digits)
20,0...149,9Ω 0,1Ω ±(20% m.v. + 3 digits)

Measurement of ground resistivity Measurement method: Wennera, ρ=2πLRE

 

Range Resolution Accuracy
0,0...199,9Ωm 0,1Ωm depending on measurement
accuracy RE with 4p method,
but not less than ±1 digit
200...1999Ωm 1Ωm
2,00k...19,99kΩm 0,01kΩm
20,0k...99,9kΩm 0,1kΩm
100k...999kΩm 1kΩm
L – distance between probes: 1...50m

Measurement of AC current (leakage)

 

Range Resolution Accuracy
0,1...99,9mA 1 0,1mA
±(8% m.v. + 5 digits)
100...999mA 1 1mA ±(8% m.v. + 3 digits)
1,00...4,99A 1,2 0,01A ±(5% m.v. + 5 digits)1
unspecified 2
5,00...9,99A 1,2 0,01A ±(5% m.v. + 5 digits)
10,0...99,9A 1,2 0,1A
100...300A 1,2 1A
1 – receiving clamp (diameter 52mm) – C-3
2 – flexible clamp (Rogowsky coil) with diameter 400 mm – F-1


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

 

Range Resolution Accuracy
0,0...99,9Ω 0,1Ω
±(2,5% m.v. + 3 digits)
100...199Ω

choice impulse edges: 4/10ms, 10/350ms

„m.v.”- measured value

More info