I've got a municipal project that needs to have the earth ground resistance measured using the fall-of-potential method.
From what i can determine this takes a meter with a couple of probes to stick in the ground at specific distances from the ground ring. Aside from that type of device (like a Fluke 1625), they make a earth ground tester that is a clamp on tester. I realize that the clamp on testor won't give me a fall-in-potential measurement but is there a major difference in the two types of testors?
