TENTECH MTD 20KWe Manual De Uso página 12

In this way, mean soil resistivity is obtained from the surface up to a
depth equal to the D distance between the rods. The information
required to determine the soil stratification by means of a graphic
method or by the use of an appropriate software is obtained by
performing several measurements with different distances between
the rods. The distances which are generally adopted are: 1m, 2m,
4m, 8m, 16 m. In order to carry out measurements with D=16m,
cables can be distributed as shown in figure 03, with the instrument
near the ES rod.
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