What does sensitivity settings on eddy current instruments primarily adjust?

Sensitivity settings on eddy current instruments primarily adjust the signal strength, which is crucial for detecting and measuring small flaws or variations in the material being tested. By increasing the sensitivity, the instrument can pick up weaker signals that may arise from small defects or inconsistencies in the material's properties.

This adjustment allows testers to fine-tune the instrument's response to different materials and their specific electrical conductivities, ultimately enhancing the accuracy and reliability of the test results. Sensitivity must often be balanced with other factors to ensure that the test response is both appropriate for the material and capable of identifying all relevant anomalies.