MRU-120 Earth Resistance Meter
Key Features:
MRU-120 meter allows for performing earthing measurements with the use of the two-clamp method without additional rods.
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earth resistance measurment with 3-pole,4-pole method,
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selective earth resistance measurement with clamp (no influence from
parallel earths; no opening of rusty junctions is needed),
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continuity of equipotential bondings and protecting conductors
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two clamps earth resistance measurement without auxiliary test probes
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earth resistivity measurement,
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Memory of 990 measurements (10 banks, each of 99 cells).
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Real time clock (RTC).
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Data transfer to a computer (USB or wireless - OR-1).
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Indication of condition of rechargeable batteries.
Measurements of protective connection and equipotential
bonding continuity:
- with auto-zero function - with current ≥ 200 mA - in accordance with
EN 61557-4.
Measurements of earth ground resistance:
- with the use of auxiliary probes (three and four-lead methods),
- with the use of auxiliary probes and clamp (for measurements of
multiple earthing),
- with the use of double clamps (for earthing measurements, when
the use of auxiliary probes is not possible),
- measurement current frequency: 125 Hz (for 50 Hz power
systems) or 150 Hz (for 60 Hz power systems),
- resistance of auxiliary probes R and R , S H
- measurement of the interfering voltage,
- measurement of the interfering signal frequency,
- measurement in the presence of interfering voltages in power
systems with the frequency of 50 Hz and 60 Hz,
- selection of maximal measurement voltage (25 V or 50 V),
Measurements of soil resistivity (with Wenner method):
- input of probes spacing distances in metres (m) or in feet (ft).
Specifications:
Electrical safety
- type of insulation: double, according to EN 61010-1and IEC 61557, EMC
- measurement category: CAT IV 300V acc. to EN 61010-1
- protection class acc. to EN 60529 IP54
Rated operational conditions:
- operation temperature................................................................................ -10...+50°C
- storage temperature................................................................................... -20...+70°C
- humidity.......................................................................................................... 20...80%
Other technical data:
- LCD display.................................................................................. graphic, backlighted
- interface..................................................................................................USB, wireless
- number of measurements carried out of set of batteries..................................... > 500
- warranty .......................................................................................................24 months
.*For full Technical Specifications, please refer to PDF Data Sheet
Standard Accessories for the MRU-120:
Optional Accessories:
- Test lead with banana plug; 1,2m; red
- Test lead with banana plugs 2,2m; black
- Test lead on a reel with banana plugs; 25m red
- Test lead on a reel with banana plugs; 25m blue
- Test lead on a reel with banana plugs; 50m yellow
- USB transmission cable
- Pin probe with banana plug; yellow
- Earth contact test probe (rod); 0,30m
- Carrying case L2
- Ni-MH battery package 4,8V 3Ah
- Crocodile clip K01; black
- Power supply adaptor Z7
- Cable for battery charger
- Hanging straps
- Calibration certificate issued by calibration laboratory
- Earth contact test probe (rod); 0,80m
- Test lead with banana plugs 2m (N-1)
- Carrying case L3
- Current clamp C-3 (Ø=52mm)
- Current clamp N-1 (Ø=52mm)
- Akumulator Ni-MH 4,8V 4,2Ah
- Battery case LR14 (size C)
- USB radio interface
- Crocodile clip K02; red
- Cramp
- Charger for battery loading from the socket of car lighter (12V)
- Software for creation of documentation from electrical measurements „SONEL PE4”