Lay out the electrodes in a grid pattern (Figure 30 below) and connectto the Model 4500 as shown in Figure 29. Proceed as follows:• Remove the shorting strip between X and Xv• Connect all four auxiliary rodsFor example, if the reading is R = 15,ρ (resistivity) = 2π x R x AA (distance between electrodes) = 450 cmρ = 6.28 x 15 x 450 = 42,390 Ω-cmDigital Ground Resistance Tester Model 4500 39ZYXXvTEST RANGETEST CURRENT2 10 50 2 20 200 2 20RBX Xv Y ZAA A15.00Figure 29AAAAAAAAAAAAFigure 30
