Earth measuring instrument CAT Catalogue Description: Earth measuring instrument, +, 3700 VAC for 1 min., 0...2 kOhm Measurement frequency range: 50...60 Hz Resistance measuring range: 0...2 kOhm 2-pole resistance measurement, alternating current: + 3- and 4-pole earth measurement: + 4-pole measurement of soil resistivity: + Batteries: 6 x LR6/AA Measurement accuracy: ±2 % Programmable limit values and settings: + Protection rating: IP56 Test voltage: 3700 VAC for 1 min.