Eddy Current Method, amplitude-sensitive
Eddy current test method, (amplitude sensitive) according to the standards ISO 2360, ASTM 7091.
Contact method: The excitation current generates a high-frequency magnetic field, which induces eddy currents in the base material. The strength of the eddy currents corresponds to the distance between the measurement probe and the base material. The magnetic field of the eddy currents opposes the original magnetic field and provides the measurement signal. Using the characteristic probe output function, i.e., the functional correlation between the measurement signal and the coating thickness, the measurement signal is converted in the instrument into the coating thickness value.
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