SIST EN ISO 9934-3:2004

SLOVENSKI STANDARD
SIST EN ISO 9934-3:2004
01-marec-2004
Neporušitveno preskušanje – Preskušanje z magnetnimi delci – 3. del: Naprave
(ISO 9934-3:2002)
Non-destructive testing - Magnetic particle testing - Part 3: Equipment (ISO 9934-3:2002)
Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 3: Geräte (ISO 9934-3:2002)
Essais non destructifs - Magnétoscopie - Partie 3: Equipement (ISO 9934-3:2002)
Ta slovenski standard je istoveten z: EN ISO 9934-3:2002
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
SIST EN ISO 9934-3:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9934-3:2004

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SIST EN ISO 9934-3:2004
EUROPEAN STANDARD
EN ISO 9934-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2002
ICS 19.100
English version
Non-destructive testing - Magnetic particle testing - Part 3:
Equipment (ISO 9934-3:2002)
Essais non destructifs - Magnétoscopie - Partie 3: Zerstörungsfreie Prüfung - Magnetpulverprüfung - Teil 3:
Equipement (ISO 9934-3:2002) Geräte (ISO 9934-3:2002)
This European Standard was approved by CEN on 4 August 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9934-3:2002 E
worldwide for CEN national Members.

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SIST EN ISO 9934-3:2004
EN ISO 9934-3:2002 (E)
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Safety requirements .4
4 Types of devices .4
4.1 Portable electromagnets (AC) .4
4.2 Current generators .6
4.3 Magnetic benches.8
4.4 Specialized testing systems .10
5 UV-A sources.11
5.1 Generals.11
5.2 Technical data .11
5.3 Minimum requirements .11
6 Detection media system.12
6.1 General.12
6.2 Technical data .12
6.3 Minimum requirements .12
7 Inspection booth .12
7.1 General.12
7.2 Technical data .12
7.3 Minimum requirements .13
8 Demagnetization .13
8.1 General.13
8.2 Technical data .13
8.3 Minimum requirements .13
9 Measurements.13
9.1 General.13
9.2 Current measurement.14
9.3 Magnetic field measurement.14
9.4 Visible light measurement .14
9.5 UV-A irradiance measurement.15
9.6 Verification and calibration of instruments.15
Bibliography .16
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SIST EN ISO 9934-3:2004
EN ISO 9934-3:2002 (E)
Foreword
This document (ISO 9934-3:2002) has been prepared by Technical Committee ISO/TC 135 "Non-destructive
testing" in collaboration with Technical Committee CEN/TC 138, "Non-destructive testing", the secretariat of which
is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by January 2003, and conflicting national standards shall be withdrawn at the latest
by January 2003.
This Standard consists of the following parts :
EN ISO 9934-1 Non destructive testing - Magnetic particle testing - Part 1 : General rules
prEN ISO 9934-2 Non destructive testing - Magnetic particle testing - Part 2 : Detection media
EN ISO 9934-3 Non destructive testing - Magnetic particle testing - Part 3 : Equipment
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
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SIST EN ISO 9934-3:2004
EN ISO 9934-3:2002 (E)
1 Scope
This European Standard describes three types of equipment for magnetic particle testing :
 portable or transportable equipment ;
 fixed installations ;
 specialized testing systems for testing components on a continuous basis, comprising a series of processing
stations placed in sequence to form a process line.
Equipment for magnetizing, demagnetizing, illumination, metering and monitoring are also described.
This standard specifies the properties to be provided by the equipment supplier, minimum requirements for
application and the method of measuring certain parameters. Where appropriate, measuring and calibration
requirements and in-service checks are also specified.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 10084 Case hardening steels - Technical delivery conditions
EN ISO 3059:2001 Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing conditions
(ISO 3059:2001)
EN ISO 9934-1:2001 Non-destructive testing - Magnetic particle testing - Part 1 : General rules (ISO 9934-1:2001)
EN 60529 Degrees of protection provides by enclosures (IP Code) (IEC 60529:1989)
3 Safety requirements
The equipment design shall take into account of all European, national and local regulations which include health,
safety, electrical and environmental requirements.
4 Types of devices
1)
4.1 Portable electromagnets (AC )
4.1.1 General
Hand-held portable electromagnets (yokes) produce a magnetic field between the two poles. (When testing
according to EN ISO 9934-1, DC electromagnets should only be used if agreed at enquiry and order stages).
Magnetization shall be determined by measuring the tangential field strength H at the centre of a line joining the
t
centres of the pole faces of the electromagnet with pole extenders where used. The electromagnet with a pole
spacing s is placed on a steel plate as shown in Figure 1. The plate shall have the dimensions (500 – 25) mm x
(250 – 13) mm x (10 – 0.5) mm and shall be of steel conforming to C 22 (EN 10084).

1) AC = alternative current, and DC = rectified current
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SIST EN ISO 9934-3:2004
EN ISO 9934-3:2002 (E)
Periodic functional checks may be carried out either by the method described above or by a lift test. The
electromagnet shall be capable of supporting a steel plate or rectangular bar conforming to C 22 (EN 10084) and
having a minimum mass of 4,5 kg, with the magnet poles set at their recommended spacing. The major dimension
of the plate or bar shall be greater than the pole spacing s of the electromagnet
NOTE : To lift a steel plate with a mass of 4,5 kg requires a lifting force of 44 N.
Dimensions in millimetres
Key
MP Measuring point for the tangential field strength
s Pole spacing
1 Poles
Figure 1 — Determination of the characteristics of portable electromagnets
4.1.2 Technical data
The following data shall be provided by the equipment supplier:
 recommended pole spacing (maximum and minimum pole spacing) (s , s );
max min
 cross sectional dimensions of the poles;
 electrical supply (voltage, current and frequency);
 current wave forms available;
 method of current control and effect on waveform (e.g. : thyristor);
 duty cycle at maximum output (ratio of current 'ON' to 'Total' time expressed as a percentage);
 maximum current 'ON' time;
 tangential field strength H at s and s (following 4.1);
t
max min
 overall dimensions of the equipment;
 equipment mass, in kilograms;
 specified electrical protection degree (IP) see EN 60529.
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SIST EN ISO 9934-3:2004
EN ISO 9934-3:2002 (E)
4.1.3 Minimum requirements
The following requirements shall be satisfied at an ambient temperature of 30 °C and at maximum output :
 duty cycle‡ 10 %
 current 'ON' time‡ 5 s
 surface temperature of handle£ 40 °C
‡ 2 kA/m (RMS)
 tangential field strength at s (see 4.1)
max
 lifting force‡ 44 N
4.1.4 Additional requirements
The electromagnet shall be supplied with a power ON/OFF switch preferably mounted on the handle.
Generally electromagnets should be usable with one hand.
4.2 Current generators
Current generators are used to supply current for magnetizing equipment. A current generator is characterized by
the open circuit voltage U , the short circuit current I and the rated current I (RMS-values).
0 k r
The rated current I is defined as the maximum current for which the generator is rated at the duty cycle of 10 %
r
and for a current 'ON' time of 5 s if not otherwise specified.
The open circuit voltage U and the short circuit current I are derived from the load-characteristic of the generator
0 k
at maximum power (with any feed back controls disconnected). The load line of the generator may be derived by
connecting two widely different loads, such as different lengths of cable, in turn to the
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