Non-destructive testing; Aids to visual inspection; Selection of low-power magnifiers

This international document outlines the criteria for selecting low-power magnifiers used in visual examination as part of non-destructive testing procedures. It provides specific technical guidance on the optical requirements and operational characteristics necessary for auxiliary equipment designed to assist inspectors during surface inspection activities. The content focuses on defining parameters such as magnification range, field of view, and lighting conditions to ensure consistent and reliable observation of surface discontinuities. By establishing these baseline requirements, the text supports the uniform application of visual inspection techniques across various industries. It serves as a reference for determining appropriate magnification levels suited to specific inspection tasks, thereby aiding in the identification of defects that may not be visible to the naked eye. The information contained within aims to standardize the selection process for magnification tools, facilitating better communication and understanding between testing personnel and quality assurance departments involved in the evaluation of material integrity.