Measurement ranges= Earth Resistance: 0 - 12 Ω/0 - 120 Ω/0 - 1200 Ω
                                               Earth Voltage [50,60Hz]: 0 - 30V AC
Accuracy= Earth Resistance: ±3% of full scale
                     Earth Voltage: ±3% of full scale
Overload protection= Earth Resistance: 276V AC for 10 seconds
                                             across 2 of the 3 terminals
                                             Earth Voltage: 276V AC for 1 minute
Optional Accessories= 7100A (Precision measurement cord set)