Earth Resistance and Resistivity Meter MRU-21

Brand: Sonel
Product code: WMGBMRU21
Price:
576,00 €excl. VAT

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

 

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

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

• measurement for DC and AC 45…65 Hz


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...19,9kΩ 0,1kΩ


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

Electric security:
- type of insulation: double, according to EN 61010-1and 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...+55°C
- storage temperature: -20...+70°C
- humidity: 20...80%

Other technical data:
- LCD display: segment, backlit
- interface: USB,
- number of measurements carried out of set of batteries: > 1000 (5Ω, 2 meas./min.)
- warranty: 3 years
- dimentions: 288x223x75mm
- weigth: 1,4kg

More info