prEN IEC 61340-4-6:2022

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

Electrostatique - 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
• Publication Date: 10-Dec-2023
• ICS: 17.200.99 - Other standards related to thermodynamics
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: CLC/SR 101 - Electrostatics
• Drafting Committee: IEC/TC 101 - IEC_TC_101
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 12-Aug-2022
• Completion Date: 12-Aug-2022
• Ref Project: oSIST prEN IEC 61340-4-6:2022 - Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps

Relations

• Revises: EN 61340-4-6:2015 - Electrostatics - Part 4-6: Standard test methods for specific applications - Wrist straps
• Effective Date: 22-Feb-2022

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

---------------------- Page: 4 ----------------------
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

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

60 Table 1 – Evaluation testing ................................................................................................... 9

61 Table 2 – Acceptance testing ................................................................................................. 9

62 Table 3 – Periodic or verification testing ................................................................................. 9

---------------------- Page: 5 ----------------------
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 ____________
68 ELECTROSTATICS –
70 Part 4-6: Standard test methods for specific
71 applications – Wrist straps
73 AMENDMENT 1
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.
---------------------- Page: 6 ----------------------
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
---------------------- Page: 7 ----------------------
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
---------------------- Page: 8 ----------------------
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.

---------------------- Page: 9 ----------------------
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.

---------------------- Page: 10 ----------------------
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

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

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

62 Table 1 – Evaluation testing .................................................................................................... 9

63 Table 2 – Acceptance testing .................................................................................................. 9

64 Table 3 – Periodic or verification testing ................................................................................. 9

---------------------- Page: 5 ----------------------
oSIST prEN IEC 61340-4-6:2022
IEC 61340-4-6/Ed3/CDV © IEC (E) – 4 – 101/661/CDV
67 INTERNATIONAL ELECTROTECHNICAL COMMISSION
68 ____________
70 ELECTROSTATICS –
72 Part 4-6: Standard test methods for specific
73 applications – Wrist straps
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.
---------------------- Page: 9 ----------------------
oSIST prEN IEC 61340-4-6:2022
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
...