GRT300: 4-Wire Earth Ground Resistance Tester

Measures earth ground resistance in 4 ranges from 2 to 2000 Ohm

Features

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