What is the minimum required illumination for inspecting fluorescent pen test results?

The minimum required illumination for inspecting fluorescent penetrant test results is at least 1000 micro-watts per square centimeter. This level of illumination is crucial because it ensures that the fluorescent materials used in the penetrant testing are adequately excited to emit bright and visible fluorescence. This visibility is essential for accurately identifying any indications of discontinuities or defects on the surface being inspected.

Fluorescent penetrant testing relies on the ability to see the fluorescent indications against a dark background, and insufficient illumination can result in missed defects. By adhering to the standard of at least 1000 micro-watts per square centimeter, inspectors can ensure they are operating within industry guidelines and achieving reliable and repeatable results during the inspection process. This level of brightness helps to maximize contrast and distinguish between useful indications and background noise effectively.