ISO 16526-1:2011
(Main)Non-destructive testing - Measurement and evaluation of the X-ray tube voltage - Part 1: Voltage divider method
Non-destructive testing - Measurement and evaluation of the X-ray tube voltage - Part 1: Voltage divider method
ISO 16526-1:2011 specifies a method for the direct and absolute measurement of the average high voltage of constant potential (DC) X-ray systems on the secondary side of the high voltage generator. The intention is to check the correspondence with the indicated high voltage value on the control unit of the X-ray system. This method is applied to assure a reproducible operation of X-ray systems because the voltage influences particularly the penetration of materials and the contrast of X-ray images and also the requirements concerning the radiation protection.
Essais non destructifs — Mesurage et évaluation de la tension des tubes radiogènes — Partie 1: Méthode par diviseur de tension
L'ISO 16526-1:2011 décrit une méthode de mesurage direct et absolu de la haute tension moyenne des tubes radiogènes à tension constante (courant continu) du côté secondaire d'un générateur haute tension. Le but est de vérifier la correspondance avec la valeur de haute tension indiquée par l'unité de contrôle du tube radiogène. Cette méthode est appliquée afin de garantir un fonctionnement reproductible des systèmes radiogènes, la tension étant un facteur particulièrement déterminant pour ce qui concerne la pénétration des matériaux et le contraste des images radiographiques ainsi que les prescriptions concernant la radioprotection.
General Information
- Status
- Published
- Publication Date
- 14-Dec-2011
- Technical Committee
- ISO/TC 135/SC 5 - Radiographic testing
- Drafting Committee
- ISO/TC 135/SC 5 - Radiographic testing
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 08-Sep-2021
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 06-Jun-2022
Overview - ISO 16526-1:2011 (Voltage divider method)
ISO 16526-1:2011 is an international standard for non-destructive testing (NDT) that specifies the voltage divider method for the direct and absolute measurement of the average high voltage (DC) on the secondary side of constant-potential X‑ray generators. Its primary purpose is to verify that the actual X‑ray tube voltage corresponds to the value indicated by the X‑ray system control unit - a key factor affecting material penetration, image contrast and radiation protection.
Key topics and technical requirements
- Principle: Use of a high-voltage resistor chain (voltage divider) between the generator and X‑ray tube, with an analog output taken across a lower resistor to measure the scaled-down voltage.
- Measurement setup: Measuring device (e.g., voltmeter or oscilloscope) connected between the high-voltage generator and the X‑ray tube; the input resistance of the measuring instrument must be taken into account.
- Resistor design:
- Divider resistances chosen so divider current is < 10% of the actual tube current.
- Resistor chain temperature stability: temperature coefficient ≤ 50 × 10^-6 /°C (as specified in the standard).
- Accuracy targets:
- Example precisions given: 1% of maximum voltage for highly stabilized systems (tomography, dosimetry), or 3% for general radiography/radioscopy.
- Reporting requirements: Test report must include system identification (type/serial number), working conditions (tube current, tube voltage, temperature), measuring-device accuracy, date, results compared with indicated values, and operator name/signature.
Practical applications and users
Who uses ISO 16526-1:
- NDT technicians and radiographers performing quality assurance on industrial X‑ray systems
- Calibration laboratories verifying X‑ray generator high-voltage accuracy
- Equipment manufacturers validating generator output and compliance
- Radiation protection officers ensuring correct operation for dose control
- Engineers conducting acceptance testing or troubleshooting of imaging contrast/penetration issues
Practical benefits:
- Ensures reproducible X‑ray operation and consistent image quality
- Helps maintain compliance with radiation protection requirements
- Provides a traceable, absolute measurement method for high-voltage verification
Related standards
- ISO 16526-2: Thick filter method - constancy checks for routine stability monitoring
- ISO 16526-3: Spectrometric method - non-invasive spectral measurement; recommended when voltage divider cannot be applied (e.g., tank units)
Keywords: ISO 16526-1, X‑ray tube voltage, voltage divider method, non-destructive testing, NDT, X‑ray systems measurement, high-voltage measurement, radiography, dosimetry, radiation protection.
ISO 16526-1:2011 - Non-destructive testing -- Measurement and evaluation of the X-ray tube voltage
ISO 16526-1:2011 - Essais non destructifs -- Mesurage et évaluation de la tension des tubes radiogenes
Frequently Asked Questions
ISO 16526-1:2011 is a standard published by the International Organization for Standardization (ISO). Its full title is "Non-destructive testing - Measurement and evaluation of the X-ray tube voltage - Part 1: Voltage divider method". This standard covers: ISO 16526-1:2011 specifies a method for the direct and absolute measurement of the average high voltage of constant potential (DC) X-ray systems on the secondary side of the high voltage generator. The intention is to check the correspondence with the indicated high voltage value on the control unit of the X-ray system. This method is applied to assure a reproducible operation of X-ray systems because the voltage influences particularly the penetration of materials and the contrast of X-ray images and also the requirements concerning the radiation protection.
ISO 16526-1:2011 specifies a method for the direct and absolute measurement of the average high voltage of constant potential (DC) X-ray systems on the secondary side of the high voltage generator. The intention is to check the correspondence with the indicated high voltage value on the control unit of the X-ray system. This method is applied to assure a reproducible operation of X-ray systems because the voltage influences particularly the penetration of materials and the contrast of X-ray images and also the requirements concerning the radiation protection.
ISO 16526-1:2011 is classified under the following ICS (International Classification for Standards) categories: 19.100 - Non-destructive testing. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 16526-1:2011 has the following relationships with other standards: It is inter standard links to ISO 661:1989. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 16526-1:2011 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 16526-1
First edition
2011-12-15
Non-destructive testing — Measurement
and evaluation of the X-ray tube
voltage —
Part 1:
Voltage divider method
Essais non destructifs — Mesurage et évaluation de la tension des
tubes radiogènes —
Partie 1: Méthode par diviseur de tension
Reference number
©
ISO 2011
© ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved
Contents Page
F oreword . iv
Introduction. v
1 Scope . 1
2 Principle. 1
3 Measurement . 2
4 Test report . 2
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16526-1 was prepared by CEN (as EN 12544-1:1999) and is submitted for approval under a special “fast-
track procedure”, by Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee SC 5,
Radiation methods, in parallel with its approval by the ISO member bodies (see the ISO/IEC Directives,
Part 1, “Fast-track procedure”).
ISO 16526 consists of the following parts, under the general title Non-destructive testing — Measurement and
evaluation of the X-ray tube voltage:
— Part 1: Voltage divider method
— Part 2: Constancy check by the thick filter method
— Part 3: Spectrometric method
iv © ISO 2011 – All rights reserved
Introduction
In order to cover the different requirements for the mea
...
NORME ISO
INTERNATIONALE 16526-1
Première édition
2011-12-15
Essais non destructifs — Mesurage et
évaluation de la tension des tubes
radiogènes —
Partie 1:
Méthode par diviseur de tension
Non-destructive testing — Measurement and evaluation of the X-ray
tube voltage —
Part 1: Voltage divider method
Numéro de référence
©
ISO 2011
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2011
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous
quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit
de l'ISO à l'adresse ci-après ou du comité membre de l'ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Publié en Suisse
ii © ISO 2011– Tous droits réservés
Sommaire Page
Avant-propos.LY
Introduction .Y
1 Domaine d'application.
2 Principe.
3 Mesurage .
4 Rapport d'essai .
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée
aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 16526-1 a été élaborée par le CEN (en tant que EN 12544-1:1999) et a été adoptée, selon une
procédure spéciale par «voie express», par le comité technique ISO/TC 135, Essais non destructifs, sous-
comité SC 5, Moyens utilisant les rayonnements, parallèlement à son approbation par les comités membres
de l’ISO (voir les Directives ISO/CEI, Partie 1, «Procédure par voie express»).
L'ISO 16526 comprend les parties suivantes, présentées sous le titre général Essais non destructifs —
Mesurage et évaluation de la tension des tubes radiogènes:
— Partie 1: Méthode par diviseur de tension
— Partie 2: Contrôle de la constance selon la méthode du filtre épais
— Partie 3: Méthode spectrométrique
iv © ISO 2011 – Tous droits réservés
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...