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上海楹点检测设备有限公司
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MRU-20接地电阻测试仪
指数:
WMGBMRU20
Earth Resistance and Resistivity Meter
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.
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...19,9 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
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