Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps

This part of IEC 61340 provides electrical and mechanical test methods and performance limits for evaluation, acceptance and periodic verification testing of wrist straps.
NOTE All dimensions are nominal except where indicated.
This standard is intended for testing wrist straps and wrist strap systems used for the grounding of personnel engaged in working with ESD sensitive assemblies and devices.
It does not address constant monitoring systems.

Elektrostatik - Teil 4-6: Standard-Prüfverfahren für spezielle Anwendungen - Handgelenkerdungsbänder

Électrostatique - Partie 4-6: Méthodes d’essai normalisées pour des applications spécifiques - Bracelets de conduction dissipative

Elektrostatika - 4-6. del: Standardne preskusne metode za posebne aplikacije - Zapestni trakovi

General Information

Status
Not Published
Public Enquiry End Date
31-Jul-2022
Technical Committee
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
26-May-2022
Due Date
13-Oct-2022
Completion Date
26-Oct-2022

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61340-4-6:2015/oprA1:2022
01-marec-2022
Elektrostatika - 4-6. del: Standardne preskusne metode za posebne aplikacije -
Zapestni trakovi - Dopolnilo A1
Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps
Elektrostatik - Teil 4-6: Standard-Prüfverfahren für spezielle Anwendungen -
Handgelenkerdungsbänder
Électrostatique - Partie 4-6: Méthodes d’essai normalisées pour des applications
spécifiques - Bracelets de conduction dissipative
Ta slovenski standard je istoveten z: EN 61340-4-6:2015/prA1:2022
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
SIST EN 61340-4-6:2015/oprA1:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61340-4-6:2015/oprA1:2022

---------------------- Page: 2 ----------------------
SIST EN 61340-4-6:2015/oprA1:2022
101/645/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61340-4-6/AMD1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-12-31 2022-03-25
SUPERSEDES DOCUMENTS:
101/628/CD, 101/634A/CC

IEC TC 101 : ELECTROSTATICS
SECRETARIAT: SECRETARY:
Germany Mr Hartmut Berndt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.

TITLE:
Amendment 1 - Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps

PROPOSED STABILITY DATE: 2027

NOTE FROM TC/SC OFFICERS:


Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

---------------------- Page: 3 ----------------------
SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 2 – 101/645/CDV

1 CONTENTS
2 FOREWORD . 4
3 INTRODUCTION . 6
4 1 Scope . 7
5 2 Terms and definitions . 7
6 3 Testing levels and performance limits . 8
7 4 Test methods . 9
8 4.1 Test method applications . 9
9 4.2 Wrist strap continuity and resistance test . 10
10 4.2.1 Purpose of test . 10
11 4.2.2 Equipment. 10
12 4.2.3 Procedure . 11
13 4.2.4 Reporting . 11
14 4.3 Band resistance test . 11
15 4.3.1 Purpose of test . 11
16 4.3.2 Equipment. 11
17 4.3.3 Procedure (interior resistance) . 12
18 4.3.4 Procedure (exterior resistance) . 12
19 4.3.5 Reporting . 12
20 4.4 Band size requirements . 12
21 4.4.1 Purpose of test . 12
22 4.4.2 Equipment. 12
23 4.4.3 Self-adjusting bands . 12
24 4.4.4 “One-size-fits-all” bands . 12
25 4.5 Breakaway force . 13
26 4.5.1 Purpose of test . 13
27 4.5.2 Breakaway force measurement . 13
28 4.6 Connection integrity . 13
29 4.6.1 Purpose of test . 13
30 4.6.2 Equipment. 13
31 4.6.3 Procedure . 13
32 4.6.4 Reporting . 14
33 4.7 Ground cord extendibility . 14
34 4.7.1 Purpose of test . 14
35 4.7.2 Ground cord extendibility procedure . 14
36 4.8 Bending life test . 14
37 4.8.1 Purpose of test . 14
38 4.8.2 Equipment. 14
39 4.8.3 Procedure . 15
40 4.8.4 Reporting . 16
41 4.9 Manufacturer’s identification . 16
42 4.10 Identification of non-standard resistance value . 16
43 4.11 Wrist strap resistance . 16
44 4.11.1 Purpose of test . 16
45 4.11.2 Equipment. 16
46 4.11.3 Procedure . 16
47 4.11.4 Reporting . 16
48 4.12 Wrist strap system continuity test . 16

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 3 – 101/645/CDV
49 4.12.1 Purpose of test . 16
50 4.12.2 Equipment. 17
51 4.12.3 Procedure with ohmmeter . 18
52 4.12.4 Procedure with integrated checker . 18
53 4.12.5 Reporting . 18
54 Bibliography . 19
55
56 Figure 1 – Wrist strap resistance test apparatus . 11
57 Figure 2 – Mechanical ground cord flex tester (example) . 15
58 Figure 3 – Wrist strap system resistance test . 18
59
60 Table 1 – Evaluation testing . 9
61 Table 2 – Acceptance testing . 9
62 Table 3 – Periodic or verification testing . 9
63
64

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 4 – 101/645/CDV
65 INTERNATIONAL ELECTROTECHNICAL COMMISSION
66 ____________
67
68 ELECTROSTATICS –
69
70 Part 4-6: Standard test methods for specific
71 applications – Wrist straps
72
73 AMENDMENT 1
74
75 FOREWORD
76 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
77 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-
78 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to
79 other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available
80 Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical
81 committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work.
82 International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation.
83 IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions
84 determined by agreement between the two organizations.
85 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
86 consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC
87 National Committees.
88 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees
89 in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,
90 IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.
91 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently
92 to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication
93 and the corresponding national or regional publication shall be clearly indicated in the latter.
94 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment
95 services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by
96 independent certification bodies.
97 6) All users should ensure that they have the latest edition of this publication.
98 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of
99 its technical committees and IEC National Committees for any personal injury, property damage or other damage of any
100 nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the
101 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
102 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
103 indispensable for the correct application of this publication.
104 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights.
105 IEC shall not be held responsible for identifying any or all such patent rights.
106 Amendment 1 to IEC 61340-4-6 has been prepared by IEC technical committee 101: Electrostatics.
107 This second edition cancels and replaces the first edition published in 2010. This edition constitutes a
108 technical revision.
109 This edition includes the following significant technical changes with respect to the previous edition:
110 a) editorial comments made during the review of the first edition were reviewed and incorporated
111 where appropriate;
112 b) several changes were made to update the Figures and improve the presentation of metric
113 measurements (Imperial measurements have been removed);
114 c) the option of using an integrated checker for wrist strap system continuity testing has been added;
115 d) the evaluation and acceptance limit for wrist strap resistance has been changed so as to
116 harmonize with IEC 61340-5-1.

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 5 – 101/645/CDV
117 The text of this Amendment is based on the following documents:
FDIS Report on voting
101/xxx/FDIS 101/xxx/RVD
118
119 Full information on the voting for the approval of this standard can be found in the report on voting
120 indicated in the above table.
121 The language used for the development of this Amendment is English.
122 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2 and developed in
123 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available at
124 www.iec.ch/members_experts/refdocs. The main document types developed by IEC are described in
125 greater detail at www.iec.ch/standardsdev/publications/.
126 A list of all parts in the IEC 61340 series, under the general title Electrostatics, can be found on the
127 IEC website.
128 The committee has decided that the contents of this publication will remain unchanged until the
129 stability date indicated on the IEC website under webstore.iec.ch in the data related to the specific
130 publication. At this date, the publication will be
131 • reconfirmed,
132 • withdrawn,
133 • replaced by a revised edition, or
134 • amended.
135
136

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 6 – 101/645/CDV
137 INTRODUCTION
138 This part of IEC 61340 has been developed to establish test methods for evaluating the electrical and
139 mechanical attributes of wrist straps used in an electrostatic control program. Wrist straps are
140 intended to connect the user to electrical ground, thus preventing electrostatic charge on a user’s
141 body from attaining a level that may damage ESD susceptible devices or assemblies.
142 Test methods and performance limits for evaluation, acceptance, and functional testing are provided.
143

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 7 – 101/645/CDV
144 ELECTROSTATICS –
145
146 Part 4-6: Standard test methods for specific
147 applications – Wrist straps
148
149
150
151 1 Scope
152 This part of IEC 61340 provides electrical and mechanical test methods and performance limits for
153 evaluation, acceptance and periodic verification testing of wrist straps.
154 NOTE All dimensions are nominal except where indicated.
155 This standard is intended for testing wrist straps and wrist strap systems used for the grounding of
156 personnel engaged in working with ESD sensitive assemblies and devices.
157 It does not address constant monitoring systems.
158 2 Terms and definitions
159 For the purposes of this document, the following terms and definitions apply.
160 2.1
161 wrist strap
162 assembled device consisting of a band and ground cord that is designed to provide electrical
163 connection from a person’s skin to ground
164 2.2
165 wrist strap system
166 wrist strap when properly worn by a person, where the electrical path includes the person, the band
167 and the ground cord
168 2.3
169 band
170 portion of the wrist strap worn on the wrist
171 Note 1 to entry: The band maintains electrical contact with a person’s skin.
172 2.4
173 ground cord
174 portion of the wrist strap that provides flexibility of movement while completing the electrical circuit
175 between the band and ground
176 2.5
177 evaluation testing
178 testing of a wrist strap to determine its electrical and mechanical performance abilities
179 Note 1 to entry: Data are in the form of values from laboratory testing.
180 2.6
181 acceptance testing
182 incoming tests to confirm proper marking and electrical functionality
183 Note 1 to entry: Data are in the form of visual inspection records and values or pass/fail notation.

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)       – 8 – 101/645/CDV
184 2.7
185 periodic verification testing
186 end-use testing to confirm electrical functionality
187 Note 1 to entry: Data are in the form of pass/fail notation or resistance values.
188 2.8
189 current-limiting resistance
190 resistance value incorporated in series with the wrist strap’s electrical path to ground
191 Note 1 to entry: This resistance limits electrical current that could pass through the ground cord in the event of inadvertent
192 user contact with an electrical potential.
193 2.9
194 resistance range
195 user-specified upper and lower resistance values which define the user-acceptable resistance values
196 of a wrist strap or wrist strap system
197 2.10
198 strain relief
199 construction feature designed to protect the connections and cord from premature failure
200 2.11
201 breakaway force
202 force required to disconnect the ground cord from the band
203 3 Testing levels and performance limits
204 This standard specifies different types of testing for wrist straps. Tables 1, 2 and 3 detail the three
205 types of testing with the associated limits and subclause references to test methods. The methods
206 provide appropriate tests for the different levels of wrist strap examination. Evaluation tests are
207 laboratory tests for measuring the performance of a wrist strap or for the comparison of wrist straps.
208 Acceptance tests provide methods for incoming goods inspection. Finally, the periodic verification or
209 functional test is a simple check of electrical continuity. This test shall be used on a regular, user
210 defined basis, to ensure that the wrist strap is electrically functional. Testing shall be carried out under
211 ambient laboratory conditions. The temperature and humidity at the time of testing shall be recorded
212 and reported in the test report. In the case of any dispute regarding test values, conditioning and
213 testing shall be done at (23 ± 2) °C and (12 ± 3) % RH.
214 NOTE Testing has shown that environmental conditions do not significantly affect test results.

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SIST EN 61340-4-6:2015/oprA1:2022
IEC 61340-4-6/Ed2/A1/CDV  IEC (E)
...

SLOVENSKI STANDARD
oSIST prEN IEC 61340-4-6:2022
01-julij-2022
Elektrostatika - 4-6. del: Standardne preskusne metode za posebne aplikacije -
Zapestni trakovi
Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps
Elektrostatik - Teil 4-6: Standard-Prüfverfahren für spezielle Anwendungen -
Handgelenkerdungsbänder
Électrostatique - Partie 4-6: Méthodes d’essai normalisées pour des applications
spécifiques - Bracelets de conduction dissipative
Ta slovenski standard je istoveten z: prEN IEC 61340-4-6:2022
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
oSIST prEN IEC 61340-4-6:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN IEC 61340-4-6:2022

---------------------- Page: 2 ----------------------
oSIST prEN IEC 61340-4-6:2022

101/661/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61340-4-6 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-05-20 2022-08-12
SUPERSEDES DOCUMENTS:
101/634A/CC

IEC TC 101 : ELECTROSTATICS
SECRETARIAT: SECRETARY:
Germany Mr Hartmut Berndt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.

TITLE:
Electrostatics – Part 4-6: Standard test methods for specific applications – Wrist straps

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:
Change to add clause 2, normative references for equipment safety is the only technical change.

Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

---------------------- Page: 3 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 2 – 101/661/CDV
1 CONTENTS
2
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 Testing levels and performance limits . 8
9 5 Test methods . 9
10 5.1 Test method applications . 9
11 5.2 Wrist strap continuity and resistance test . 10
12 5.2.1 Purpose of test . 10
13 5.2.2 Equipment . 10
14 5.2.3 Procedure . 11
15 5.2.4 Reporting . 12
16 5.3 Band resistance test . 12
17 5.3.1 Purpose of test . 12
18 5.3.2 Equipment . 12
19 5.3.3 Procedure (interior resistance) . 12
20 5.3.4 Procedure (exterior resistance) . 12
21 5.3.5 Reporting . 12
22 5.4 Band size requirements . 12
23 5.4.1 Purpose of test . 12
24 5.4.2 Equipment . 13
25 5.4.3 Self-adjusting bands . 13
26 5.4.4 "One-size-fits-all" bands . 13
27 5.5 Breakaway force . 13
28 5.5.1 Purpose of test . 13
29 5.5.2 Breakaway force measurement . 13
30 5.6 Connection integrity . 13
31 5.6.1 Purpose of test . 13
32 5.6.2 Equipment . 13
33 5.6.3 Procedure . 14
34 5.6.4 Reporting . 14
35 5.7 Ground cord extendibility . 14
36 5.7.1 Purpose of test . 14
37 5.7.2 Ground cord extendibility procedure . 14
38 5.8 Bending life test . 15
39 5.8.1 Purpose of test . 15
40 5.8.2 Equipment . 15
41 5.8.3 Procedure . 16
42 5.8.4 Reporting . 16
43 5.9 Manufacturer's identification . 16
44 5.10 Identification of non-standard resistance value . 16
45 5.11 Wrist strap resistance . 16
46 5.11.1 Purpose of test . 16
47 5.11.2 Equipment . 16
48 5.11.3 Procedure . 17

---------------------- Page: 4 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 3 – 101/661/CDV
49 5.11.4 Reporting . 17
50 5.12 Wrist strap system continuity test . 17
51 5.12.1 Purpose of test . 17
52 5.12.2 Equipment . 17
53 5.12.3 Procedure with ohmmeter . 19
54 5.12.4 Procedure with integrated checker . 19
55 5.12.5 Reporting . 19
56 Bibliography . 20
57
58 Figure 1 – Wrist strap resistance test apparatus . 11
59 Figure 2 – Mechanical ground cord flex tester (example) . 16
60 Figure 3 – Wrist strap system resistance test . 18
61
62 Table 1 – Evaluation testing . 9
63 Table 2 – Acceptance testing . 9
64 Table 3 – Periodic or verification testing . 9
65
66

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oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 4 – 101/661/CDV
67 INTERNATIONAL ELECTROTECHNICAL COMMISSION
68 ____________
69
70 ELECTROSTATICS –
71
72 Part 4-6: Standard test methods for specific
73 applications – Wrist straps
74
75 FOREWORD
76 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
77 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
78 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
79 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
80 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
81 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
82 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
83 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
84 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
85 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
86 consensus of opinion on the relevant subjects since each technical committee has representation from all
87 interested IEC National Committees.
88 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
89 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
90 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
91 misinterpretation by any end user.
92 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
93 transparently to the maximum extent possible in their national and regional publications. Any divergence between
94 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
95 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
96 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
97 services carried out by independent certification bodies.
98 6) All users should ensure that they have the latest edition of this publication.
99 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
100 members of its technical committees and IEC National Committees for any personal injury, property damage or
101 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
102 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
103 Publications.
104 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
105 indispensable for the correct application of this publication.
106 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
107 rights. IEC shall not be held responsible for identifying any or all such patent rights.
108 IEC 61340-4-6 has been prepared by IEC technical committee 101: Electrostatics. It is an
109 International Standard.
110 This third edition cancels and replaces the second edition published in 2015. This edition
111 constitutes a technical revision.
112 This edition includes the following significant technical changes with respect to the previous
113 edition:
114 a) editorial comments made during the review of the second edition were reviewed and
115 incorporated where appropriate;
116 b) addition of a normative section, clause 2 to address safety of equipment;
117 The text of this International Standard is based on the following documents:

---------------------- Page: 6 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 5 – 101/661/CDV
Draft Report on comments
101/628/CD 101/634A/CC
118
119 Full information on the voting for its approval can be found in the report on voting indicated in
120 the above table.
121 The language used for the development of this International Standard is English
122 A list of all parts in the IEC 61340 series, under the general title Electrostatics, can be found
123 on the IEC website.
124 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
125 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
126 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
127 described in greater detail at www.iec.ch/publications.
128 The committee has decided that the contents of this document will remain unchanged until the
129 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
130 specific document. At this date, the document will be
131 • reconfirmed,
132 • withdrawn,
133 • replaced by a revised edition, or
134 • amended.
135
136

---------------------- Page: 7 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 6 – 101/661/CDV
137 INTRODUCTION
138 This part of IEC 61340 has been developed to establish test methods for evaluating the
139 electrical and mechanical attributes of wrist straps used in an electrostatic control program.
140 Wrist straps are intended to connect the user to electrical ground, thus preventing electrostatic
141 charge on a user's body from attaining a level that may damage ESD susceptible devices or
142 assemblies.
143 Test methods and performance limits for evaluation, acceptance, and functional testing are
144 provided.
145

---------------------- Page: 8 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 7 – 101/661/CDV
146 ELECTROSTATICS –
147
148 Part 4-6: Standard test methods for specific
149 applications – Wrist straps
150
151
152 1 Scope
153 This part of IEC 61340 provides electrical and mechanical test methods and performance limits
154 for evaluation, acceptance and periodic verification testing of wrist straps.
155 NOTE All dimensions are nominal except where indicated.
156 This standard is intended for testing wrist straps and wrist strap systems used for the grounding
157 of personnel engaged in working with ESD sensitive assemblies and devices.
158 It does not address constant monitoring systems.
159 2 Normative references
160 The following documents are referred to in the text in such a way that some or all of their content
161 constitutes requirements of this document. For dated references, only the edition cited applies.
162 For undated references, the latest edition of the referenced document (including any
163 amendments) applies.
164 IEC 61010-1, Safety requirements for electrical equipment for measurements, control, and
165 laboratory use – Part 1 General Requirements
166 IEC 61010-2-030, Safety requirements for electrical equipment for measurement, control, and
167 laboratory use – Part 2–030 Particular requirements for equipment having testing or measuring
168 circuits
169 3 Terms and definitions
170 For the purposes of this document, the following terms and definitions apply.
171 ISO and IEC maintain terminology databases for use in standardization at the following
172 addresses:
173 • IEC Electropedia: available at https://www.electropedia.org/
174 • ISO Online browsing platform: available at https://www.iso.org/obp
175 3.1
176 wrist strap
177 assembled device consisting of a band and ground cord that is designed to provide electrical
178 connection from a person's skin to ground
179 3.2
180 wrist strap system
181 wrist strap when properly worn by a person, where the electrical path includes the person, the
182 band and the ground cord
183 3.3
184 band
185 portion of the wrist strap worn on the wrist
186 Note 1 to entry: The band maintains electrical contact with a person's skin.

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IEC 61340-4-6/Ed3/CDV © IEC (E) – 8 – 101/661/CDV
187 3.4
188 ground cord
189 portion of the wrist strap that provides flexibility of movement while completing the electrical
190 circuit between the band and ground
191 3.5
192 evaluation testing
193 testing of a wrist strap to determine its electrical and mechanical performance abilities
194 Note 1 to entry: Data are in the form of values from laboratory testing.
195 3.6
196 acceptance testing
197 incoming tests to confirm proper marking and electrical functionality
198 Note 1 to entry: Data are in the form of visual inspection records and values or pass/fail notation.
199 3.7
200 periodic verification testing
201 end-use testing to confirm electrical functionality
202 Note 1 to entry: Data are in the form of pass/fail notation or resistance values.
203 3.8
204 current-limiting resistance
205 resistance value incorporated in series with the wrist strap's electrical path to ground
206 Note 1 to entry: This resistance limits electrical current that could pass through the ground cord in the event of
207 inadvertent user contact with an electrical potential.
208 3.9
209 resistance range
210 user-specified upper and lower resistance values which define the user-acceptable resistance
211 values of a wrist strap or wrist strap system
212 3.10
213 strain relief
214 construction feature designed to protect the connections and cord from premature failure
215 3.11
216 breakaway force
217 force required to disconnect the ground cord from the band
218 4 Testing levels and performance limits
219 This standard specifies different types of testing for wrist straps. Tables 1, 2 and 3 detail the
220 three types of testing with the associated limits and subclause references to test methods. The
221 methods provide appropriate tests for the different levels of wrist strap examination. Evaluation
222 tests are laboratory tests for measuring the performance of a wrist strap or for the comparison
223 of wrist straps. Acceptance tests provide methods for incoming goods inspection. Finally, the
224
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