EN IEC 61340-4-7:2025
(Main)Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
This part of IEC 61340 provides test methods and procedures for evaluating and selecting air ionization equipment and systems (ionizers). This document establishes measurement techniques, under specified conditions, to determine offset voltage (ion balance) and decay (charge neutralization) time for ionizers. This document does not include measurements of electromagnetic interference (EMI), or the use of ionizers in connection with ordnance, flammables, explosive items or electrically initiated explosive devices. As contained in this document, the test methods and test conditions can be used by manufacturers of ionizers to provide performance data describing their products. Users of ionizers are urged to modify the test methods and test conditions for their specific application in order to qualify ionizers for use, or to make periodic verifications of ionizer performance. The user will decide the extent of the data required for each application. See Annex A for information regarding theoretical background and additional information on the standard test method for the performance of ionizers. CAUTION: Procedures and equipment described in this document can expose personnel to hazardous electrical and non-electrical conditions. Users of this document are responsible for selecting equipment that complies with applicable laws, regulatory codes and both external and internal policy. Users are cautioned that this document cannot replace or supersede any requirements for personnel safety. See Annex C for safety considerations.
Elektrostatik - Teil 4-7: Standard-Prüfverfahren für spezielle Anwendungen - Ionisation
Electrostatique - Partie 4-7 : Méthodes d'essai normalisées pour des applications spécifiques - Ionisation
L'IEC 61340-4-7:2025 fournit des méthodes et des procédures d'essai pour évaluer et choisir le matériel et les systèmes d'ionisation de l'air (ioniseurs). Le présent document établit des techniques de mesure, dans des conditions spécifiées, destinées à déterminer la tension de décalage (équilibre ionique) et le temps de décroissance (neutralisation des charges) pour les ioniseurs. Le présent document ne traite pas des mesurages des brouillages électromagnétiques (EMI, Electromagnetic Interference) ni de l'emploi d'ioniseurs en relation avec des éléments pyrotechniques, inflammables, explosifs ou des appareils explosifs amorcés électriquement. Les méthodes d'essai et les conditions d'essai spécifiées dans le présent document peuvent être utilisées telles quelles par les fabricants d'ioniseurs afin de fournir des données de performance pour la description de leurs produits. Les utilisateurs d'ioniseurs sont encouragés à modifier les méthodes d'essai et les conditions d'essai de leur application spécifique afin de qualifier les ioniseurs pour l'utilisation ou d'effectuer des vérifications périodiques de la performance des ioniseurs. Il revient à l'utilisateur de déterminer la quantité de données exigées pour chaque application. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) une NOTE 3 a été ajoutée à la Figure 5 afin d'expliciter qu'un seul émetteur à alternance de polarité +/- est utilisé pour les barres et les grilles en courant alternatif; b) à l'Annexe B, l'erreur relative aux appareils de mesure à été mise à jour pour prendre en compte la résolution du voltmètre.
Elektrostatika - 4-7. del: Standardne preskusne metode za posebno uporabo - Ionizacija (IEC 61340-4-7:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN 61340-4-7:2017
Elektrostatika - 4-7. del: Standardne preskusne metode za posebno uporabo -
Ionizacija (IEC 61340-4-7:2025)
Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization (IEC
61340-4-7:2025)
Elektrostatik - Teil 4-7: Standard-Prüfverfahren für spezielle Anwendungen – Ionisation
(IEC 61340-4-7:2025)
Electrostatique - Partie 4-7: Méthodes d'essai normalisées pour des applications
spécifiques - Ionisation (IEC 61340-4-7:2025)
Ta slovenski standard je istoveten z: EN IEC 61340-4-7:2025
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61340-4-7
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 17.200.99; 29.020 Supersedes EN 61340-4-7:2017
English Version
Electrostatics - Part 4-7: Standard test methods for specific
applications - Ionization
(IEC 61340-4-7:2025)
Electrostatique - Partie 4-7 : Méthodes d'essai normalisées Elektrostatik - Teil 4-7: Standard-Prüfverfahren für spezielle
pour des applications spécifiques - Ionisation Anwendungen - Ionisation
(IEC 61340-4-7:2025) (IEC 61340-4-7:2025)
This European Standard was approved by CENELEC on 2025-09-23. CENELEC 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 CEN-CENELEC
Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61340-4-7:2025 E
European foreword
The text of document 101/739/FDIS, future edition 3 of IEC 61340-4-7, prepared by TC 101
"Electrostatics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
document have to be withdrawn
This document supersedes EN 61340-4-7:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61340-4-7:2025 was approved by CENELEC as a
European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61010-1 - Safety requirements for electrical equipment for EN 61010-1 -
measurement, control, and laboratory use - Part 1:
General requirements
IEC 61340-4-7 ®
Edition 3.0 2025-08
INTERNATIONAL
STANDARD
Electrostatics -
Part 4-7: Standard test methods for specific applications - Ionization
ICS 17.200.99; 29.020 ISBN 978-2-8327-0643-5
IEC 61340-4-7:2025-08(en)
IEC 61340-4-7:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test fixture and instrumentation . 8
5 Specific requirements for equipment categories . 10
5.1 Specific requirements for all ionization equipment . 10
5.2 Room ionization . 11
5.3 Laminar flow hood ionization . 13
5.4 Worksurface ionization . 15
5.5 Compressed gas ionizers – Guns and nozzles . 17
Annex A (informative) Theoretical background and additional information on the
standard test method for the performance of ionizers . 19
A.1 Introductory remarks . 19
A.2 Air ions . 19
A.3 Mobility and ion current . 19
A.4 Neutralization current . 20
A.5 Neutralization rate . 20
A.6 Ion depletion and field suppression . 20
A.7 Charged plate monitor and charge neutralization . 21
A.8 Relationship between charged plate monitor decay time and actual object . 21
A.9 Offset voltage . 21
A.10 Preparation of test area . 22
A.11 Ion transport in airflow . 22
A.12 Obstruction of airflow around the charged plate monitor . 22
A.13 Effect of "air blanket" . 23
A.14 Sources of measurement error . 23
A.14.1 Typical decay time variability . 23
A.14.2 Plate isolation . 23
A.14.3 Charging voltage . 23
A.14.4 Materials near the plate . 23
A.14.5 Other field-producing devices in test area . 23
A.14.6 Effect of offset voltage on decay time . 24
A.15 Importance of ionization equipment maintenance . 24
Annex B (normative) Method of measuring the capacitance of an isolated conductive
plate . 25
B.1 Method . 25
B.2 Equipment . 25
B.3 Procedure . 25
B.4 Example. 26
B.5 Sources of error . 26
B.5.1 Measuring equipment . 26
B.5.2 Poor plate isolation . 27
B.5.3 Objects in the environment . 27
B.5.4 Stray capacitance . 28
Annex C (informative) Safety considerations . 29
IEC 61340-4-7:2025 © IEC 2025
C.1 General . 29
C.2 Electrical . 29
C.3 Ozone . 29
C.4 Radioactive . 29
C.5 X-ray . 29
C.6 Installation . 29
Bibliography . 30
Figure 1 – Charged plate monitor components for non-contacting plate measurement . 9
Figure 2 – Charged plate monitor components for contacting plate measurement . 9
Figure 3 – Conductive plate detail of the non-contacting CPM . 9
Figure 4 – Conductive plate detail of the voltage follower CPM . 10
Figure 5 – Test locations for room ionization – AC bars, grids and DC bar systems . 12
Figure 6 – Test locations for room ionization – Single polarity emitter systems . 12
Figure 7 – Test locations for room ionization – Two DC-line systems . 13
Figure 8 – Test locations for room ionization – Pulsed DC emitter systems . 13
Figure 9 – Test locations for vertical laminar flow hood – Top view . 14
Figure 10 – Test locations for vertical laminar flow hood – Side view . 14
Figure 11 – Test locations for horizontal laminar flow hood – Top view . 15
Figure 12 – Test locations for horizontal laminar flow hood – Side view . 15
Figure 13 – Test locations for benchtop ionizer – Top view . 16
Figure 14 – Test locations for benchtop ionizer – Side view . 16
Figure 15 – Test locations for overhead ionizer – Top view . 17
Figure 16 – Test locations for overhead ionizer – Side view . 17
Figure 17 – Test locations for compressed gas ionizer (gun or nozzle) – Side view . 18
Table 1 – Test set-ups and test locations and points (TP) . 11
Table B.1 – Example measurement data . 26
IEC 61340-4-7:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrostatics -
Part 4-7: Standard test methods for specific applications - Ionization
FOREWORD
1) The International Electr
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