Sonel MRU-20 接地电阻/电阻率仪

Possible measurements:

  • earth resistance measurment with 3-pole method,
  • measurement of continuity of equipotential bondings and protective conductors with auto-zero function - with current 200mA,
  • resistance measurement using 2-pole method.

Additionally: 

  • AUTO-OFF function after 5 minutes,
  • indication of battery state.

 


Detail

 It allows to take: 

- earth resistance measurement using auxiliary probes with 3-pole method,
- resistance measurement using 2-pole method,
- measurement of continuity of equipotential bondings and protective conductors (meeting the requirements of IEC 61557-4) with auto-zero function – with current 200mA.

Additionally:
- AUTO-OFF function after 5 minutes,
- indication of battery state.

Measurement of earthing resistance 
measurement range to IEC61557-5: 
0,50Ω...1,99kΩ Un=50V;
0,68Ω...1,99kΩ dla Un=25V

 

Range Resolution Accuracy
0,00...9,99Ω 0,01Ω
±(2% m.v. + 3 digits)
10,0...99,9Ω 0,1Ω
100...999Ω
1,00...19,9kΩ 0,01kΩ

• measurement current: under short circuit >20mA,
• voltage on open terminals: selectable 25V AC or 50V AC,
• frequency of measurement current: 125Hz
 

Measurement of resistance of auxiliary electrodes RH i RS

Range Resolution Accuracy
0...999Ω ±(5% (RS+RE+RH) + 3 digits)
1,00k...9,99kΩ 0,01kΩ
10,0k...50,0kΩ 0,1kΩ


Measurement of interference voltage U(RMS)

 

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

 

Measuremet of continuity of equipotential bondings and protective conductors 
measurement range to IEC61557-4: 0,13...199Ω

Range Resolution Accuracy
0,00...9,99Ω 0,01Ω ±(2% m.v. + 3 digits)
10,0...99,9Ω 0,1Ω
100...199Ω

• measuring method: technical 2-pole method,
• max. voltage on open terminals: 13V,
• measurement current: under short circuit >200mA,
• auto-zero function for measurement leads0,13Ω...199Ω

Electric security:
- type of insulation: double, according to IEC 61010-1and IEC 61557
- measurement category: CAT IV 300V acc. to IEC 61010-1
- protection class acc. to EN 60529: IP54

Rated operational conditions:
- operation temperature: -10...+55°C
- storage temperature: -20...+70°C
- humidity: 20...80%

Other technical data:
- power supply: alkaline batteries or NiMH rechargeable batteries, size AA (8 pcs)
- LCD display: segment, backlit
- weight with batteries: approx. 1,3kg 
- dimensions: 260 x 190 x 60mm
- electromagnetic compatibility: according to IEC 61000-6-3 and IEC 61000-6-2

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