Fluke 1623GEO Earth Ground TesterThe Fluke 1623 is one of our Factory New GEO Earth Ground Testers.The Fluke 1623 is a distinctive earth ground tester that can perform all four types of earth ground measurement.Specifically, the Fluke 1623 testers are able to measure earth ground loop resistances using only clamps – called Stakeless testing.This method doesn’t require the use of earth ground stakes or the disconnection of ground rods.Testing Methods:3- and 4-Pole Fall of Potential – standard earth ground testing using two ground stakes4-Pole Soil Resistivity testing – determine soil resistivity using four ground stakesSelective testing – without disconnecting ground rods, a technician can measure ground resistance using a combination of stakes and a clampStakeless testing – innovative solution using only clamps, instead of ground stakes, to measure earth ground loop resistance Fluke 1623 features:One-button measurement concept3- and 4-pole earth ground measure