Ground resistance testers, MRU-200 is the only meter in the market which uses all measurement methods. Possible measurements: earth resistance measurment with 2-pole, 3-pole,4-pole method, impulse earth impedance measurement, three kinds of measuring impulse 410μs, 820μs, 10350μs, earth resistance measurement without disconnecting measured earths (using clamp), two clamps earth resistance measurement without auxiliary test probs, earth resistivity measurement, continuity measurement, leakage current measurement.