Earth Testing Methods

K.N.K.Srinivas

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Megger - Earth Testing Pioneer Dr George Tagg pioneered earth testing at Megger Designing, manufacturing and selling for well over 50 years

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Days gone by

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Earth Testing theory

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Two Basic Test Types Earth resistivity Choose location and design for earth system

Earth system resistance Check resistance low enough

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Earth Resistivity

Theory

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Soil Resistivity Purpose of this test: Find lowest possible resistance in an area Obtain the values needed to design the earth system

Factors affecting Earth resistivity Earth composition Moisture in the ground Temperature

Consider Resistivity will vary through the year Moisture more constant at water table

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Earth Resistivity test methodsMethods: 4-pole (Wenner method).Imeas

Emeas C1 (E) P1 (ES) P2 (S) C2 (H)

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