What do the abscissa values on the impedance plane represent?

In the context of the impedance plane, the abscissa values represent normalized resistance. This is crucial in interpreting impedance diagrams, as it allows operators to correlate changes in the measured signal to variations in conductivity and resistive properties of the test material.

Normalized resistance provides a dimensionless comparison of the resistance relative to a reference value, which can vary based on the configuration or material type. This normalization makes it easier to identify trends or defects in the material being tested, as changes in normalized resistance can indicate variations in the material's electrical properties.

Understanding how normalized resistance functions within the impedance plane is fundamental for analyzing data gathered during Eddy Current Testing, and it helps in making decisions based on the presence of flaws or material anomalies. Thus, recognizing the role of normalized resistance on the abscissa allows practitioners to effectively assess the integrity of the materials being evaluated.