Instrument can decide resistor of loop of ground connection ... supply,good function,big output current.It take 4 wire measurement with high resolution power,less error,light weight,easy ... portable the ideal selection of earth meter. Technical data Measurement range: 0~100Ω, 0~10Ω, 0~1Ω(three ... level) Measurement accuracy: ±3% (full degree) Earth resistance of auxiliary earth ...