... in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth ground resistance measurement. ... down display.9. Earth Ground Resistance Range--0.01Ω~2000Ω Resolution--0.01Ω Accuracy---±1%rdg±3dgt10.Earth Ground ... 4-3,Wireless frequency electromagnetic field≤1V/m 18.Protection Type IEC61010-1,IEC1010-2-31,IEC61557-1, ...