| Earth Resistance Range | 0.010 Ω to 19.99 kΩ (auto-ranging), 1 mΩ resolution. |
| Accuracy (23°C ±2°C) | ±0,5% of reading ±2 digits |
| Service Error | ±5% of reading ±2 digits ±10 mΩ (meets VDE service error over 50 mΩ) |
| Comply with Standards | BS 7430 (1991) |
| VDE 0413 Part 7 (1982) |
| Test Frequency | 105 to 160 Hz reversing d.c. (50 Hz operation default to 128 Hz, 60 Hz operation default to 150 Hz) Set in steps of 0,5 Hz |
| Test Current | 50 mA max (selectable high and low levels) |
| Maximum Output Voltage | < 50 V r.m.s. |
| Maximum Interference | Typically 40 V peak-to-peak (50/60 Hz, sinusoidal nature) |