Máy đo điện trở đất và điện trở suất Sonel MRU-20 có các thông số kỹ thuật sau:
- Hãng sản xuất: Sonel
- Model: MRU-20
- Xuất xứ: Ba Lan
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.
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 200mA.
Additionally:
- AUTO-OFF function after 5 minutes,
- indication of battery state.
Measurement of earthing resistance
measurement range to IEC61557-5:
0,50Ω...1,99kΩ Un=50V;
0,68Ω...1,99kΩ dla 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
|
|
1,00...19,9kΩ
|
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 RH i RS
|
Range
|
Resolution
|
Accuracy
|
|
0...999Ω
|
1Ω
|
±(5% (RS+RE+RH) + 3 digits)
|
|
1,00k...9,99kΩ
|
0,01kΩ
|
|
10,0k...50,0kΩ
|
0,1kΩ
|
Measurement of interference voltage UN (RMS)
|
Range
|
Resolution
|
Accuracy
|
|
0...100V
|
1V
|
±(2% m.v. + 3 digits)
|
Measuremet of continuity of equipotential bondings and protective conductors
measurement range to IEC61557-4: 0,13...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 leads0,13Ω...199Ω
Electric security:
- type of insulation: double, according to IEC 61010-1and IEC 61557
- measurement category: CAT IV 300V 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. 1,3kg
- dimensions: 260 x 190 x 60mm
- electromagnetic compatibility: according to IEC 61000-6-3 and IEC 61000-6-2
