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上海楹点检测设备有限公司
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MRU-21接地电阻测试仪
指数:
WMGBMRU21
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.
Measurement of earthing resistance
measurement range to IEC61557 - 5:
0,50 Ω...1,99 kΩ for Un=50 V;
0,68 Ω...1,99 kΩ for 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 | |
1,00k...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 interference voltage UN (RMS)
Range | Resolution | Accuracy |
0...100 V | 1 V | ±(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...999 Ω | 1 Ω | ±(5% (RS+RE+RH) + 3 digits) |
1,00k...9,99 kΩ | 0,01 kΩ | |
10,0k...19,9 kΩ | 0,1 kΩ |
Measuremet of continuity of equipotential bondings and protective conductors
measurement range to IEC61557 - 4: 0,13 Ω...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 leads
Electric security:
type of insulation: double, according to EN 61010 - 1and IEC 61557
measurement category: CAT IV 300 V 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 (5 Ω, 2 meas./min.)
warranty: 3 years
dimentions: 288 x 223x75 mm
weigth: 1,4 kg
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