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  • BSI
    BS EN ISO 32543-3:2026 Non-destructive testing. Characteristics of focal spots in industrial X-ray systems - Measurement of the effective focal spot size of mini and micro focus X-ray tubes
    Edition: 2026
    $422.27
    / user per year

Description of BS EN ISO 32543-3:2026 2026

This document specifies a method for the measurement of focal spot dimensions within the range of 5 µm to 300 µm of X-ray systems up to and including 225 kV tube voltage. This determination is based on the evaluation of an image with a dedicated focal spot that has been radiographically recorded using an edge and evaluated with a digital method. The imaging quality and the resolution of X-ray images depend highly on the characteristics of the effective focal spot, in particular the size and the two-dimensional intensity distribution as seen from the detector plane. For the characterization of commercial X-ray tube types (i.e. for advertising or trade) the specific maximum values of Annex A are preferred. NOTE The same procedure can be used at higher kilovoltages by agreement but the accuracy of the measurement can be poorer.

Standard NumberBS EN ISO 32543-3:2026
TitleNon-destructive testing. Characteristics of focal spots in industrial X-ray systems - Measurement of the effective focal spot size of mini and micro focus X-ray tubes
StatusDefinitive
Publication Date2026-02-26
ReplacesBS EN 12543-5:1999
Identical National Standard OfISO 32543-3:2026, EN ISO 32543-3:2026
DescriptorsX-ray tubes, Testing conditions, Test specimens, Electron tubes, Industrial, Non-destructive testing, Radiography, Focal spots, Exposure time, X-ray apparatus, Size measurement, Length, Dimensional measurement, Radiographic testing
ICS19.100 Non-destructive testing
CommitteeWEE/46/5
ISBN978 0 539 32527 0
PublisherBSI
Pages24



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About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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