Description Earth Resistance Meter MRU-10 Measurement of interference voltage UN (RMS) Range Resolution Accuracy 0…100 V 1 V ±(10% m.v. 1 digit) Measurement of earthing resistance (method 3-pole) measurement range to IEC 61557-5:2007: 0,53 Ω…9999 Ω (for 50 V) Range Resolution Accuracy 0,00…19,99 Ω 0,01 Ω ±(3% m.v. 3 digits) 20,0…199,9 Ω 0,1 Ω 200…1999 Ω 1 Ω ±5% m.v. 2000…9999 Ω 1 Ω ±8% m.v. measurement current: under short circuit >20 mA, voltage on open terminals: selectable 25 V AC or 50 V AC, frequency of measurement current: 125 Hz (for networks 50 Hz) or 150 Hz (for 60 Hz), selection of measuring frequency in settings. Measurement of earthing resistance (method 2-pole) Range Resolution Accuracy 0,01…19,99 Ω 0,01 Ω ±(3% m.v. 3 digits) 20,0…199,9 Ω 0,1 Ω 200,0…1999 Ω 1 Ω ±5% m.v. 2000…9999 Ω 1 Ω ±8% m.v. Measurement of earthing resistance (method 2-pole) RH and RS Range Resolution Accuracy 0…999 Ω 1 Ω ±8% m.v. 1,00…9,99 kΩ 0,01 Ω 10,0…19,9 kΩ 0,1 Ω Electric security: type of insulation: double, according to EN 61010-1 and IEC 61557, measurement category: CAT IV 150 V acc. to EN 61010-1, protection class acc. to EN 60529: IP67. Rated operational conditions: operation temperature: -10… 50°C, storage temperature: -20… 60°C, humidity: 20…90%. Other technical data: LCD display: segment, backlit, dimensions: 221 x 102 x 62 mm, number of measurements (RE3P) carried out of set of batteries: > 3000 Calibration certificates are issued during the production process. New calibration certificates are available upon request at an additional cost. Earth Resistance Meter MRU-10
