BS EN 12543-5:1999 specifies a radiographic method for measuring the effective focal spot dimensions of mini- and micro-focus X-ray tubes used in industrial nondestructive testing. The method applies to focal spot dimensions from 5 µm to 300 µm and X-ray systems operating at tube voltages up to and including 225 kV. It covers equipment requirements, test object configuration, geometric magnification, exposure conditions, image measurement, and determination of focal spot size in the length and width directions.
The standard supports radiographic certification and evaluation of X-ray imaging performance using sharp-edge images, film or radioscopic equipment, and cross-wire or ball test objects.
Application Scope: Industrial radiography, nondestructive testing, X-ray system qualification, focal spot measurement, radiographic equipment evaluation, and quality assurance.
