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 - Dopolnilo A1

General Information

Status
Not Published
Technical Committee
Drafting Committee
Current Stage

RELATIONS

Buy Standard

Amendment
EN 61340-4-6:2015/oprA1:2022
English language
19 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

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)
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.