How are inductance values of an impedance diagram adjusted to eliminate dependence upon the number of turns in a test coil?

Inductance values on an impedance diagram are normalized to account for variations due to different numbers of turns in a test coil. Normalization involves adjusting the inductance values so that they reflect a standardized basis, typically per turn or per unit of the coil’s characteristics. This process allows for a more accurate comparison of results regardless of the coil configuration used during testing.

By normalizing the inductance values, the effects of coil design variations are minimized, ensuring that the analysis of the testing results focuses on the material properties being evaluated rather than on the specifics of the test setup. This is important in Eddy Current Testing as it enhances consistency and reliability when interpreting the data, which could otherwise lead to mischaracterization of the material being tested if differences in coil turns were not adequately managed.