Fluke 1625-2 GEO Earth Ground Tester & Kit - Fluke 4325162, Stakeless Earth testing:- The Fluke 1625-2 earth ground tester is able to measure earth ground loop resistances using only clamps.
With Stakeless testing, the earth ground rod does not need to be disconnected - leaving the bonded earth ground system intact during test.
With this test method, two clamps are placed around the earth ground rod and each are connected to the tester.
No earth ground stakes are used at all.
A known, fixed voltage is induced by one clamp and the current is measured using the second clamp.
Then the tester automatically determines the resistance of the earth ground rod.
This test method only works if a bonded earth ground system exists for the building or structure under test, but most are.
If there is only one path to ground, like at many residential applications, the Stakeless method will not provide an acceptable value and the Fall of Potential test method must be used.
Fluke 1625-2 Geo Earth Ground Tester