Fig. 18From: Inspecting the corrosion state of underground reinforced concrete structuresEvaluation of eq. (1) for several parameter combinations of the input impedance of the voltmeter (10 MΩ. for the solid line and 3000 MΩ for the dashed line) and different resistance of the electrical circuit (10 kΩ, 1400 kΩ, 2500 kΩ)Back to article page