Measurement ranges= Earth Resistance: 0 - 20Ω/0 - 200Ω/0 - 2000Ω
                                               Earth Voltage [50,60Hz]: 0 - 200V AC
Accuracy= Earth Resistance: ±2%rdg±0.1Ω (20Ωrange)
                     ±2%rdg±3dgt (200Ω/2000Ωrange)
                     Earth Voltage: ±1%rdg±4dgt
Overload protection= Earth Resistance: 280V AC for 10 seconds
                                             across 2 of the 3 terminals
                                             Earth Voltage: 300V AC for 1 minute
Optional Accessories= 7100A (Precision measurement cord set)