SONEL MRU-200 Máy đo điện trở đất và điện trở suất Sonel MRU-200

- Measurement of interference voltage
+ 0...100 V/ 1 V /±(2% m.v + 3 digits)
- Range Measurement of earth resistance (method 3- and 4-pole) 
+ 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/ 0,01 kΩ /±(5% m.v. + 2 digits)
+ 10,0k...19,9 kΩ/ 0,1 kΩ /±(5% m.v. + 2 digits)
- Measurement of resistance of auxiliary electrodes RH and RS
+ 0...999 Ω/ 1 Ω /±(5% (RS+RE+RH) + 8 digits)
+ 1,00k...9,99 kΩ/ 0,01 kΩ /±(5% (RS+RE+RH) + 8 digits)
+ 10,0k...19,9 kΩ/ 0,1 kΩ /±(5% (RS+RE+RH) + 8 digits)
- Measurement of multiple earth resistance with using the clamp and auxiliary electrodes (3p + clamp) (option clamp)
+ 0,00...19,99 Ω/ 0,01 Ω /±(8% m.v. + 3 cyfry)
+ 20,0...199,9 Ω/0,1 Ω /±(8% m.v. + 3 cyfry)
+ 200...1999 Ω/1 Ω /±(8% m.v. + 3 cyfry)
- Measurement of multiple earth resistance with using double clamps (option clamp)
+ 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 
+ 0,0...199,9 Ωm /0,1 Ωm     
+ 200...1999 Ωm /1 Ωm 
+ 2,00k...19,99 kΩm /0,01 kΩm 
+ 20,0k...99,9 kΩm /0,1 kΩm 
+ 100k...999 kΩm /1 kΩm

Detail

 It allows to take the measurements of: 

  • earthing resistance using auxiliary electrodes,
  • earthing resistance using auxiliary electrodes and clamp (for measurements of multiple earthing)
  • earthing resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
  • impulse earth resistance (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 IEC61557-50,120Ω...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

– 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

 

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