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The GRT300 measures earth ground in 4 ranges from 2 to 2000 Ohm. 4-wire, 3-wire, and 2-wire testing. Large dual line LCD. Automatic I (current) and P (potential) spike check. Test Hold function for easy operation. Autoranging, Automatic Zero adjustment, Data Hold and Auto Power off. AC Earth Voltage. Overrange and low battery indication. Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries.
From the Manufacturer
4-Wire Earth Ground Resistance Tester Kit includes all hardware necessary to measure earth ground In 4 ranges from 2 to 2000Ω. 4-wire, 3-wire, and 2-wire testing. Overrange and low battery indication. Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries.
Rodolfo
2025-06-05 13:56:53
Excellent
MC4
2025-02-12 13:38:02
can not apply the method of Wenner of the 4 terminal measurement, though the meter has 4 terminal measurement, does not work if C1 and P1 are shorted. Finally it works like a 3 meter measuring terminals. It was a disappointment. The image output at amazon, the meter which shows the applicable methods is not true, the meter brings another image where C1 and P1 are shorted in the 4-terminal method of measurement.
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