MRU-20
Index: WMGBMRU20
Earth Resistance and Resistivity Meter
Description
Technical Specification
Files
  • Description

    Possible measurements:

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

    Additionally:

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

    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 200 mA.

    Additionally:

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

    Measurement of earthing resistance
    measurement range to IEC61557 - 5:

    • 0,50 Ω...1,99 kΩ Un=50 V;
    • 0,68 Ω...1,99 kΩ dla Un=25 V
    Range Resolution Accuracy
    0,00...9,99 Ω 0,01 Ω
    ±(2% m.v. + 3 digits)
    10,0...99,9 Ω 0,1 Ω
    100...999 Ω 1 Ω
    1,00...1,99 kΩ 0,01 kΩ
    • 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

    Measurement of resistance of auxiliary electrodes RH i RS

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

    Measurement of interference voltage UN (RMS)

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

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

    Range Resolution Accuracy
    0,00...9,99 Ω 0,01 Ω ±(2% m.v. + 3 digits)
    10,0...99,9 Ω 0,1 Ω
    100...199 Ω 1 Ω
    • measuring method: technical 2-pole method,
    • max. voltage on open terminals: 13 V,
    • measurement current: under short circuit >200 mA,
    • auto-zero function for measurement leads0,13 Ω...199 Ω

    Electric security:

    • type of insulation: double, according to IEC 61010 - 1and IEC 61557
    • measurement category: CAT IV 300 V 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. 1,3 kg
    • dimensions: 260 x 190 x 60 mm
    • electromagnetic compatibility: according to IEC 61000 - 6 - 3 and IEC 61000 - 6 - 2
  • Files

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