SIST-TS CEN/TS 17100:2017

Non-destructive testing - Penetrant and magnetic particle testing - Reference photographs and sizing of indications

This document specifies minimum requirements in order to obtain and reproduce photographs used as reference records relative to PT (penetrant testing) colour contrast and fluorescent indications. It also provides requirements for the monitoring of resolution when measurements are to be indirectly performed by recording.

Zerstörungsfreie Prüfung - Eindring- und Magnetpulverprüfung - Referenzfotos und Dimensionierung von Indikationen

Dieses Dokument legt die Mindestanforderungen fest, die zum Erhalt und zur Reproduktion von Fotografien erforderlich sind, die als Referenzaufnahmen für die Eindringprüfung mit Farbkontrast- und Fluoreszenz-Anzeigen verwendet werden. Es nennt außerdem Anforderungen für die Überwachung der Auflösung, wenn Messungen indirekt durch Aufnahmen erfolgen.

Essais non destructifs - Contrôle par ressuage et par magnétoscopie - Photographies de référence et dimensionnement des indications

Le présent document spécifie les exigences minimales permettant d’obtenir et de reproduire des photographies utilisées comme enregistrements de référence par rapport aux indications provenant de produits fluorescents ou colorés lors du contrôle par ressuage. Il fournit également des exigences concernant l’évaluation de la résolution lorsque les mesures doivent être effectuées indirectement par le biais d’un enregistrement.

Neporušitvene preiskave - Pregled s penetranti in magnetnimi delci - Referenčne fotografije in dimenzioniranje označb

Ta dokument določa minimalne zahteve za pridobivanje in razmnoževanje fotografij, ki se uporabljajo kot referenčni zapisi glede barvnega kontrasta (pregled s penetranti) in fluorescentnih indikacij. Prav tako določa zahteve za nadzor ločljivosti, ko se meritve izvajajo posredno s snemanjem.

General Information

• Status: Published
• Publication Date: 22-Oct-2017
• ICS: 19.100 - Non-destructive testing
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Sep-2017
• Due Date: 19-Nov-2017
• Completion Date: 23-Oct-2017
• Ref Project: CEN/TS 17100:2017 - Non-destructive testing - Penetrant testing - Reference photographs and sizing of indications

Overview

CEN/TS 17100:2017 - Non‑destructive testing - Penetrant testing - Reference photographs and sizing of indications is a CEN Technical Specification that sets minimum requirements for obtaining and reproducing photographic records used in penetrant testing (PT). The standard covers both colour contrast and fluorescent PT techniques and provides rules for lighting, filtering, camera setup, record resolution and monitoring when measurements are performed indirectly from photographs.

Key topics and technical requirements

• Purpose: Define an approved reference photograph as a master record that preserves the true shape, sharpness and dimensions of PT indications for visual baselines and indirect sizing.
• Lighting equipment: Even, glare‑free illumination; use of two sources placed symmetrically (beams ≥ 90° apart) is recommended. For white light, the rendering colour index (CRI) should be > 0.7 and homogeneity > 0.7. Colour temperature should follow NDT material supplier recommendations (EN ISO 3059).
• UV‑A / actinic blue sources: Homogeneous illumination and control of parasitic background; UV‑blocking filters recommended for lenses.
• Filtering:
  • Colour contrast: no visible cut‑off filters; polarizers allowed to remove reflections; conversion filters may be used according to lamp type.
  • Fluorescent: filters must not fluoresce and should preserve indicator visibility (recommended transmission characteristics are given for bands below 420 nm, 450 nm and peak 500–550 nm).
• Record resolution and targets: Use resolution targets (ISO 12233 style) as Picture Quality Indicators. Choose positive targets for colour contrast and negative targets for fluorescent shots; ensure resolution in the sensitive area meets sizing uncertainty requirements.
• Camera position and settings: Place the camera at least twice the maximum scene dimension and perpendicular to the principal surface to avoid geometric distortion. Use small apertures for depth of field, bracketing exposures, and monitor exposure to avoid over/underexposure (important for contrast and for hiding faint indications).
• Digital records & reproduction: Guidance on digital processing, printouts and screen displays to ensure faithful reproduction of PT indications.

Applications and users

Practical uses include:

• Creating reproducible reference photographs for inspection records and certification.
• Indirect sizing of indications from photographic records.
• Quality assurance, inspection audits, training materials and baseline comparison in NDT programs.

Primary users:

• NDT technicians and inspection engineers
• Quality managers and laboratory personnel
• Photographic technicians working in inspection environments
• Equipment and NDT materials suppliers

Related standards

Relevant normative references include:

• CEN/TR 16638:2014 (blue light guidance)
• EN ISO 3059 (viewing conditions)
• EN ISO 12706 (NDT vocabulary)
• ISO 12233 (resolution testing)
• ISO 18911 (storage practices for imaging materials)

Keywords: CEN/TS 17100:2017, penetrant testing, non‑destructive testing, reference photographs, sizing of indications, fluorescent, colour contrast, NDT photography, resolution, lighting, camera settings.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2017
1HSRUXãLWYHQHSUHLVNDYH3UHJOHGVSHQHWUDQWLLQPDJQHWQLPLGHOFL5HIHUHQþQH
IRWRJUDILMHLQGLPHQ]LRQLUDQMHR]QDþE
Non-destructive testing - Penetrant and magnetic particle testing - Reference
photographs and sizing of indications
Zerstörungsfreie Prüfung - Eindring- und Magnetpulverprüfung - Referenzfotos und
Dimensionierung von Indikationen
Essais non destructifs - Contrôle par ressuage et par magnétoscopie - Photographies de
référence et dimensionnement des indications
Ta slovenski standard je istoveten z: CEN/TS 17100:2017
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17100
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
September 2017
TECHNISCHE SPEZIFIKATION
ICS 19.100
English Version
Non-destructive testing - Penetrant testing - Reference
photographs and sizing of indications
Essais non destructifs - Contrôle par ressuage et par Zerstörungsfreie Prüfung - Eindringprüfung -
magnétoscopie - Photographies de référence et Referenzfotos und Dimensionierung von Anzeigen
dimensionnement des indications
This Technical Specification (CEN/TS) was approved by CEN on 2 July 2017 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17100:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Safety precautions. 4
5 General principles . 4
5.1 Purpose of a reference photograph . 4
5.2 Lighting equipment . 5
5.2.1 General requirement . 5
5.2.2 White light sources . 5
5.2.3 UV-A and actinic blue radiation sources . 5
5.2.4 Layout of lighting devices . 6
5.3 Filtering . 7
5.3.1 General . 7
5.3.2 White light, colour contrast technique . 7
5.3.3 UV-A light, fluorescent technique . 7
5.3.4 Actinic blue filters . 7
5.4 Record resolution . 8
5.5 Relative position of the camera and the part . 9
5.6 Contrast ratio . 11
5.6.1 Fluorescent process photographs . 11
5.6.2 Colour contrast process photographs . 11
6 Camera settings . 11
7 Record: equipment and techniques . 11
7.1 Digital photographic records . 11
7.2 Digital processing . 12
8 Printouts . 12
8.1 General . 12
8.2 Colour contrast techniques, printouts of photographs under white light . 13
8.3 Fluorescent techniques, printouts of photographs under UV-A radiation . 13
8.4 Resolution patterns . 13
9 Screen displays . 14
Bibliography . 15
European foreword
This document (CEN/TS 17100:2017) has been prepared by Technical Committee CEN/TC 138
“Non-destructive testing”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any
or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of
the following countries are bound to announce this Technical Specification: Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic
of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia,
Spain, Sweden, Switzerland, Turkey and the United Kingdom.
1 Scope
This document specifies minimum requirements in order to obtain and reproduce photographs
used as reference records relative to PT (penetrant testing) colour contrast and fluorescent
indications. It also provides requirements for the monitoring of resolution when measurements
are to be indirectly performed by recording.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
CEN/TR 16638:2014, Non-destructive testing - Penetrant and magnetic particle testing using blue
light
EN ISO 3059, Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing
conditions (ISO 3059)
EN ISO 12706, Non-destructive testing - Penetrant testing - Vocabulary (ISO 12706)
ISO 12233, Photography — Electronic still picture imaging — Resolution and spatial frequency
responses
ISO 18911, Imaging materials — Processed safety photographic films — Storage practices
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12706, ISO 12233,
ISO 18911, CEN/TR 16638 and the following apply:
3.1
reference photograph
approved record with sufficient sharpness and details showing all or part of PT indications used
as a master document and the visual baseline
4 Safety precautions
All relevant international, regional, national and local regulations including health and safety
recommendations and particularly photobiological rating for lighting sources shall be taken into
account.
5 General principles
5.1 Purpose of a reference photograph
A reference photograph is a representative record of an approved indication, obtained after a PT
process. It can be used for indirect sizing of the indication. Precautions shall be taken for the
monitoring of resolution.
The indication record shall not modify the true indication, shape, sharpness and dimensions.
The record shall reproduce the indication in a proper form.
The used medium shall be relevant to the record and sufficient enough to display with the
required quality the record whatever the representation form: printed photograph, display on
an active screen or projection via optical equipment.
5.2 Lighting equipment
5.2.1 General requirement
The sources used to light the scene shall provide an even lighting distribution.
Glare and reflections shall be avoided.
If a flash system is used, precautions shall be taken regarding possible vigneting and probable
non-homogeneous light distribution. Accessories like a diffusing shield or an indirect beam may
be used.
The uniformity lighting factor is defined as the ratio between the minimum irradiance and the
maximum irradiance E /E .
min max
E and E are the average values of at least four of the lowest measurements and four of the
min max
highest measurements, performed at regular intervals in the diagonal of greater dimension
perpendicular to the beam axis. For large scenes, this should not be limited to only eight
measurements; the maximum spacing between two measurements is set at 3,5 cm.
5.2.2 White light sources
For artificial white light, the rendering colour index shall be above 0,7.
Homogeneity of the light distribution shall be better than 0,7.
Colour temperature shall meet the recommendations of the NDT materials supplier, according to
EN ISO 3059.
NOTE Usually intermediat
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