Fluke Earth Ground Tester, Basic, +, > 50 mA, 48 V, 0.001 Ohm...19.99 kOhm

GEO Earth Ground Testers offer data storage and download capabilities via USB port. 3- and 4-Pole Fall of Potential, using stakes. 4-Pole Soil Resistivity testing, using stakes. Selective testing, using 1 clamp and stakes. Stakeless testing, using 2 clamps only. Automatic Frequency Control (AFC) - identifies interferences and chooses a frequency for more accurate earth ground value. R* measurement - calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance.