The Fluke 1625-2 Earth Ground Tester measures earth ground loop resistances using only clamps with the stakeless test method. Two clamps are placed around the earth ground rod, with a known voltage induced by one clamp and current measured by the second, eliminating the need for auxiliary stakes. This method works for bonded earth ground systems.

Additional test methods include 3 & 4 pole fall-of-potential, selective testing using one clamp, and 4 pole soil resistivity. Automatic frequency control (AFC) and adjustable limits enable quicker testing. The IP56-rated tester is suitable for outdoor use and stores up to 1500 records in internal memory.