Description Earth Resistance Meter | MRU-200 GPS It allows the measurements of: earth resistance using auxiliary electrodes earth resistance using auxiliary electrodes and clamp (for measurements of multiple earthing) earth resistance using double clamps for measuring multiple earthing without underground connections impulse earth impedance (without disconnecting measured earthing) ground resistivity (Wenner method) current using the clamp (e.g. leakage) and flexible clamp (Rogowsky coil) 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 200 mA Additionally: measurement of resistance of auxiliary electrodes RS and RH measurement of interference voltage measurement of interference frequency measurement in the presence of interference voltage in the power network with frequency 16 2/3 Hz, 50 Hz, 60 Hz and 400 Hz (with automatic selection of proper frequency of measuring signal or with manual selection) selection of maximum measuring voltage (25 V and 50 V) introducing the distance between the electrodes for the resistivity in metres (m) and feet (ft) memory of 990 measurements (10 banks of 99 cells each) calibration of clamp used real time clock (RTC) data transmission to the computer USB and Bluetooth* indication of battery state *Bluetooth communication from serial number E40001 Electric security: type of insulation: double, according to EN 61010 – 1 and 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… 50°C storage temperature: -20… 70°C humidity: 20…80% Other technical data: LCD display: graphic, backlit interface: USB number of measurements carried out of set of batteries: > 1200 warranty: 24 months Measurement of interference voltage Range Resolution Accuracy 0…100 V 1 V ±(2% m.v. 3 digits) Measurement of interference frequency Range Resolution Accuracy 15…450 Hz 1 Hz ±(1% m.v. 2 digits) Measurement of earthing resistance (method 3- and 4-pole) measurement range to IEC61557 – 5: 0,100 Ω…19,9 kΩ Range Resolution Accuracy 0,000…3,999 Ω 0,001 Ω ±(2% m.v. 4 digits) 4,00…39,99 Ω 0,01 Ω ±(2% m.v. 2 digits) 40,0…399,9 Ω 0,1 Ω 400…3999 Ω 0,001 kΩ 4,00k…19,99 kΩ 0,01 kΩ ±(5% m.v. 2 digits) Measurement of continuity of equipotential bondings and protective conductors (Rcont) measurement range to IEC61557 – 4: 0,045 Ω…19,99 kΩ Range Resolution Accuracy 0,000…3,999 Ω 0,001 Ω ±(2% m.v. 4 digits) 4,00…39,99 Ω 0,01 Ω ±(2% m.v. 2 digits) 40,0…399,9 Ω 0,1 Ω 400…3999 Ω 0,001 kΩ 4,00k…19,99 kΩ 0,01 kΩ ±(5% m.v. 2 digits) Measurement of resistance of auxiliary electrodes RH and RS Range Range Accuracy 0…999 Ω 1 Ω ±(5% (RS RE RH) 8 digits) 1,00k…9,99 kΩ 0,01 kΩ 10,0k…19,9 kΩ 0,1 kΩ Measurement of multiple earthing resistance with using the clamp and auxiliary electrodes (3p clamp) Range Resolution Accuracy 0,000…3,999 Ω* 0,01 Ω ±(8% m.v. 4 digits) 10,0…99,9 Ω 0,01 Ω ±(8% m.v. 3 digits) 100…999 Ω 0,1 Ω 1,00k…1,99 kΩ 1 Ω * – in range 0,000…0,045 Ω the accuracy is not specified. Measurement of multiple earthing resistance with using double clamps Range Resolution Accuracy 0,00…19,99 Ω 0,1 Ω ±(10% m.v. 3 digits) 20,0…149,9 Ω 0,1 Ω ±(20% m.v. 3 digits) Measurement of ground resistivity Measurement method: Wennera, ρ=2πLRE Range Resolution Accuracy 0,0…199,9 Ωm 0,1 Ωm depending on measurement accuracy RE with 4p method, but not less than ±1 digit 200…1999 Ωm 1 Ωm 2,00k…19,99 kΩm 0,01 kΩm 20,0k…99,9 kΩm 0,1 kΩm 100k…999 kΩm 1 kΩm L – distance between probes: 1…50 m Measurement of AC current (leakage) Range Resolution Accuracy 0,1…99,9 mA 1 0,1 mA ±(8% m.v. 5 digits) 100…999 mA 1 1 mA ±(8% m.v. 3 digits) 1,00…4,99 A 1,2 0,01 A ±(5% m.v. 5 digits)1 unspecified 2 5,00…9,99 A 1,2 0,01 A ±(5% m.v. 5 digits) 10,0…99,9 A 1,2 0,1 A 100…300 A 1,2 1 A 1 – receiving clamp (diameter 52 mm) – C-3 2 – flexible clamp (Rogowsky coil) with diameter 400 mm – F-1 Measurement of dynamic earthing resistance (RD) with impulse wave method (4p ) Range Resolution Accuracy 0,0…99,9 Ω 0,1 Ω ±(2,5% m.v. 3 digits) 100…199 Ω 1 Ω choice impulse edges: 4/10μs, 8/20μs, 10/350μs “m.v.”- measured value Standard Accessories Test lead with banana plug; 1,2 m; red Test lead with banana plugs 2,2 m; black Test lead on a reel with banana plugs; 25 m red Test lead on a reel with banana plugs; 25 m blue Shielded test lead on a reel with banana plugs; 50m yellow USB transmission cable charger for battery loading from the socket of car lighter (12 V) Earth contact test probe (rod); 0,30 m – (4 pcs.) Carrying case L2 Ni-MH battery package 4,8 V 4,2 Ah Crocodile clip K01; black Crocodile clip K02; red Cramp Power supply adaptor Z7 Cable for battery charger Hanging straps Calibration certificate issued by calibration laboratory Earth Resistance Meter | MRU-200 GPS
