How the equipment calculates electrical resistivity?
Landmapper applies a pulsating current (I) through electrodes A and B and measures arising potential (ΔU) on electrodes MN in well-known four-electrode principle described by van der Pauw and Wenner. Electrical resistivity calculated from the Ohms law as where K is the geometrical coefficient of the array. The equipment calculates ER automatically if the user enters an appropriate coefficient into the device memory.
