EN 61340-2-1:2002

SLOVENSKI STANDARD
01-april-2003
Electrostatics - Part 2-1: Measurement methods - Ability of materials and products
to dissipate static electric charge
Electrostatics -- Part 2-1: Measurement methods - Ability of materials and products to
dissipate static electric charge
Elektrostatik -- Teil 2-1: Messverfahren - Fähigkeit von Materialien und Erzeugnissen,
elektrostatische Ladungen abzuleiten
Electrostatique -- Partie 2-1: Méthodes de mesure - Capacité des matériaux et des
produits à dissiper des charges électrostatiques
Ta slovenski standard je istoveten z: EN 61340-2-1:2002
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 61340-2-1
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2002
ICS 17.220.99; 29.020
English version
Electrostatics
Part 2-1: Measurement methods -
Ability of materials and products to dissipate static electric charge
(IEC 61340-2-1:2002)
Electrostatique Elektrostatik
Partie 2-1: Méthodes de mesure - Teil 2-1: Messverfahren -
Capacité des matériaux et des produits Fähigkeit von Materialien und
à dissiper des charges électrostatiques Erzeugnissen, elektrostatische
(CEI 61340-2-1:2002) Ladungen abzuleiten
(IEC 61340-2-1:2002)
This European Standard was approved by CENELEC on 2002-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61340-2-1:2002 E
Foreword
The text of document 101/138/FDIS, future edition 1 of IEC 61340-2-1, prepared by IEC TC 101,
Electrostatics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61340-2-1 on 2002-09-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-09-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A and ZA are normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61340-2-1:2002 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61340-5-2 NOTE Harmonized as EN 61340-5-2:2001 (not modified).
__________
- 3 - EN 61340-2-1:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 61340-5-1 1998 Electrostatics
+ corr. February 1999 Part 5-1: Protection of electronic EN 61340-5-1 2001
devices from electrostatic phenomena - + corr. April 2001
General requirements
ISO 2859-0 1995 Sampling procedures for inspection by--
attributes
Part 0: Introduction to the ISO 2859
attribute sampling system
ISO/TR 13425 1995 Guide for the selection of statistical--
methods in standardization and
specification
NORME
CEI
INTERNATIONALE IEC
61340-2-1
INTERNATIONAL
Première édition
STANDARD
First edition
2002-06
Electrostatique –
Partie 2-1:
Méthodes de mesure –
Capacité des matériaux et des produits
à dissiper des charges électrostatiques
Electrostatics –
Part 2-1:
Measurement methods –
Ability of materials and products
to dissipate static electric charge
© IEC 2002 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
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Pour prix, voir catalogue en vigueur
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61340-2-1 © IEC:2002 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.9
2 Normative references .9
3 Definitions .9
4 Method of measurement of charge decay .11
4.1 Principles .11
4.2 Environmental conditions .11
4.3 Apparatus for using corona charging .13
4.3.1 Physical design features.13
4.3.2 Containment of test material.15
4.3.3 Corona charge deposition.15
4.3.4 Fieldmeter .17
4.4 Apparatus for using a charged metal plate.17
4.4.1 Physical design features.17
4.4.2 Charge decay time measurements (t ).19
sd
5 Sampling .21
Annex A (normative) Test methods and procedures .23
Bibliography.35

61340-2-1 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROSTATICS –
Part 2-1: Measurement methods –
Ability of materials and products
to dissipate static electric charge
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61340-2-1 has been prepared by IEC technical committee 101:
Electrostatics.
The text of this standard is based on the following documents:
FDIS Report on voting
101/138/FDIS 101/141/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annex A forms an integral part of this standard.
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61340-2-1 © IEC:2002 – 7 –
INTRODUCTION
Measurements of the rate of dissipation of static charge belong to the essential measurement
techniques in the field of electrostatics.
For homogeneous conductive materials this property can be evaluated by measuring
resistance or resistivity parameters.
For materials in the dissipative or insulative range and especially for high ohmic materials
including conductive fibres (e.g. textiles with a metallic grid), resistance measurements may
not be reliable enough or may not give enough information and the rate of dissipation of static
charge needs to be measured.
For many non-metal materials, such as plastics, the transport of charges is dependent on the
applied electrical field strength during the measurement, for example, a measurement of
resistance will show a non-linear dependence on applied test voltage. There are also
problems with spatial inhomogeneity with measurement methods that use contacting
electrodes. These points are covered by measuring the rate of dissipation of charge.

61340-2-1 © IEC:2002 – 9 –
ELECTROSTATICS –
Part 2-1: Measurement methods –
Ability of materials and products
to dissipate static electric charge
1 Scope
This part of IEC 61340 describes test methods for measuring the rate of dissipation of static
charge of insulating and static dissipative materials and products.
It includes a generic description of test methods and detailed test procedures for specific
applications.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 61340-5-1:1998, Electrostatics – Part 5-1: Protection of electronic devices from
electrostatic phenomena – General requirements
ISO 2859-0:1995, Sampling procedures for inspection by attributes – Part 0: Introduction to
the ISO 2859 attribute sampling system
ISO/TR 13425:1995, Guide for the selection of statistical methods in standardization and
specification
3 Definitions
For the purpose of this part of IEC 61340, the following definitions apply.
3.1
charge decay
migration of charge across or through a material leading to a reduction of charge density or
surface potential at the area where the charge was deposited
3.2
charge decay time constant
time required for the local charge density or surface potential to fall to 1/e of its initial value (e
being
...