主要功能特点：
- Measures earth ground resistance - 3 point (fall of potential) or 2 point tests
- Automatically calculates resistivity - 4 point test
- Automatic voltage measurement prevents false measurements
- Automatically applies three testing frequencies for the most accurate readings
- Test leads, auxiliary electrodes and software are included for complete instrument
- Auto ranging
- 999 internal memory locati*** to store measurements
- RS-232 download to a personal computer