MRU-21 Earth Resistance Meter
Key Features:
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Earth resistance measurement with 3-pole method.
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Measurements of continuity of equipotential bonding and protective conductors with auto-zero function - with current 200mA.
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Resistance measurement using 2-pole method.
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Memory of 990 measurements, data transfer to a computer over the USB interface.
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Indication of charge level of batteries or rechargeable batteries.
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Battery or rechargeable battery power supply.
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Auto-off after 5 minutes.
Measurements of protective connection and equipotential
bonding continuity:
measurement range to IEC 61557-4: 0,13 Ω...199 Ω
Specifications:
Measurement of earth ground resistance:
- with the use of the three-lead method with auxiliary probes,
measurements with the resistance of auxiliary probes up to 50 k ,
- measurement of resistance of auxiliary probes R and R , S H
- measurement of the interfering voltage,
- measurement in the presence of interfering voltages from the
power system,
- selection of maximal measurement voltage (25 V or 50 V).
Two-lead measurement of resistance:
- auto-zero of test leads.
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...+55°C
- storage temperature................................................................................... -20...+70°C
- humidity.......................................................................................................... 20...80%
Other technical data:
- power supply of the meter.......... 4 x 1.5 V batteries or rechargeable C type batteries
- LCD display........................................................................................ segment, backlit
- interface.................................................................................................................USB
- number of measurements carried out in a set of batteries.....>1000 (5Ω 2 meas./min
- warranty ...........................................................................................................2 years
- dimensions........................................................................................ 288x223x75 mm
- weight............................................................................................................. .1.4kg
.*For full Technical Specifications, please refer to PDF Data Sheet
Standard Accessories for the MRU-21:
Optional Accessories:
- Test lead with banana plug; 1,2m; blue
- Test lead with banana plug 2,2m; black
- Test lead on a reel with banana plugs; 30m; red
- Test lead on a reel with banana plugs; 15m; blue
- "Crocodile" clip K02; blue
- USB cable
- Earth contact test probe (rod); 0,30m - 2 pcs
- Carrying case L4
- "Crocodile" clip K01; black
- Hanging straps
- LR14 battery container (size C)
- Batteries
- Calibration certificate
- Sonel Reader software
- earth contact test probe (rod); 0,8m;
- carrying case L3
- Test lead on reel with banana plugs 25m; blue
- Test lead on reel with banana plugs 50m; yellow
- Test wire reel
- „Crocodile” clip K02; red
- Cramp
- Software for creation of documentation from electrical
measurements, .SONAL PE4"
- Hardware adapter for Sonal PE program