Máy đo điện trở đất và điện trở suất Sonel MRU-21
It allows to take:
- earth resistance measurement using auxiliary probes with 3-pole method,
measurements with max. resistance of auxiliary probes 50kΩ
- resistance measurement using 2-pole method
- measurement of continuity of equipotential bondings and protective
conductors (meeting the requirements of IEC 60364-6-61:2000 section
6.12.2) with auto-zero function – with current 200mA.
Additional y:
- measurement of resistance of auxiliary electrodes R and R , S H
- measurement of interference voltage,
- high immunity to interference voltage
- selection of maximum measuring voltage (25V and 50V),
- memory of 990 measurement results
- data transmission to the computer (USB)
- indication of battery state.
Electric security:
- type of insulation double, according to PN-EN 61010-1and IEC 61557
- measurement category CAT IV 300V acc. to PN-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
Measurement of earthing resistance Máy đo điện trở đất và điện trở suất Sonel MRU-21
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 |
1Ω |
|
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 resistance of auxiliary electrodes R i R H S
|
Range |
Resolution |
Accuracy |
|
0...999Ω |
1Ω |
±(5% (R +R +R ) + 3 digits) S E H |
|
1,00k...9,99kΩ |
0,01kΩ |
|
10,0k...50,0kΩ |
0,1kΩ |
Measurement of interference voltage U n (RMS)
|
Range |
Resolution |
Accuracy |
|
0...100V |
1V |
±(2% m.v. + 3 digits) |
|
measurement for DC and AC 45…65 Hz
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 |
1Ω |
- measuring method: technical 2-pole method,
• max. voltage on open terminals: 13V,
• measurement current: under short circuit >200mA,
• auto-zero function for measurement leads
