IEC TS 61340-5-4:2021

Electrostatics - Part 5-4: Protection of electronic devices from electrostatic phenomena - Compliance verification

IEC TS 61340-5-4:2021(E) describes compliance verification testing for technical items that are included in ESD control programs, such as those specified in IEC 61340-5-1.
Test methods are based on those specified in IEC 61340-5-1 and other parts of the IEC 61340 series, and are simplified where necessary for the purposes of compliance verification, to be performed by competent personnel.
Users can, by reference to this document in their compliance verification plan, adopt the necessary test methods described herein without change or addition. Alternatively, test methods described in this document can be adapted to match the requirements of their own ESD control program, provided deviations in equipment or procedure are documented in their compliance verification plan.
Compliance verification test frequency is not specified in this document. Guidance on how users can consider compliance verification test frequency is given in informative Annex A.
Product qualification is excluded from the scope of this document.
This first edition cancels and replaces IEC TR 61340-5-4 published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC TR 61340­5-4:
test methods in the main body of the document have been made normative, and consequently normative references have been added;
the term "ESD ground" has been added and defined;
description of equipment for measuring low resistance has been added;
user specified electrodes, including surface resistance bar electrodes, are permitted to be used for resistance measurements;
an informative annex on verification of compliance verification test equipment has been added;
compliance verification of person-footwear-flooring systems by measuring body voltage has been moved to an informative annex.

General Information

• Status: Published
• Publication Date: 29-Aug-2021
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 101 - Electrostatics
• Drafting Committee: WG 5 - TC 101/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 30-Aug-2021
• Completion Date: 30-Sep-2021

Relations

• Replaces: IEC TR 61340-5-4:2019 - Electrostatics - Part 5-4: Protection of electronic devices from electrostatic phenomena - Compliance verification
• Effective Date: 05-Sep-2023

Overview

IEC TS 61340-5-4:2021 - "Electrostatics - Part 5‑4: Protection of electronic devices from electrostatic phenomena - Compliance verification" is a Technical Specification from IEC that provides compliance verification test methods for items used in ESD control programs. The methods are drawn from IEC 61340‑5‑1 and other parts of the IEC 61340 series, simplified where appropriate so they can be performed by competent personnel. This edition formalizes several methods as normative, adds the term ESD ground, and expands guidance on test equipment and electrode options.

Key topics and requirements

• Scope and purpose
  • Defines verification test methods for technical items used in ESD control programs (not for product qualification).
  • Users may adopt the methods directly or adapt them, provided deviations are recorded in the compliance verification plan.
• Normative test methods
  • Test procedures for common ESD control items (work surfaces, wrist straps, footwear, flooring, seating, air ionizers, garments, packaging, etc.).
  • Methods are based on IEC 61340‑5‑1 and other IEC 61340 parts.
• Test equipment and instrumentation
  • Guidance on selection and use of instruments: charged plate monitors (CPM), electrostatic field meters, electrostatic voltmeters, resistance measuring apparatus, low resistance meters, concentric ring electrodes, two‑point probes and user‑specified electrodes (including surface resistance bar electrodes).
  • New informative annex on verification of compliance verification test equipment.
• Grounding and bonding
  • Definitions and verification procedures for equipment ground, bonding points and the newly defined ESD ground.
• Flexibility and documentation
  • Compliance verification test frequency is not specified - Annex A offers guidance for establishing frequency in a program.
  • Adaptations permitted when documented in the compliance verification plan.

Practical applications - who uses this standard

• ESD program managers and compliance officers establishing or auditing verification programs.
• Quality and reliability engineers responsible for ESD risk mitigation in electronics manufacturing and assembly.
• Facility managers and technicians who perform routine verification of wrist straps, footwear systems, workstations, flooring, air ionizers, garments and packaging.
• Third‑party auditors and consultants evaluating compliance with IEC 61340 series ESD controls.

Related standards

• IEC 61340‑5‑1 (Protection of electronic devices from electrostatic phenomena - General ESD control requirements) - primary reference for control program design.
• Other parts of the IEC 61340 series for detailed test methods and definitions.

Keywords: IEC TS 61340-5-4, ESD compliance verification, electrostatics, ESD control program, wrist strap testing, work surface testing, air ionizer verification, ESD ground, resistance measurement.

Standards Content (Sample)

IEC TS 61340-5-4 ®
Edition 1.0 2021-08
TECHNICAL
SPECIFICATION
colour
inside
Electrostatics –
Part 5-4: Protection of electronic devices from electrostatic phenomena –
Compliance verification
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IEC TS 61340-5-4 ®
Edition 1.0 2021-08
TECHNICAL
SPECIFICATION
colour
inside
Electrostatics –
Part 5-4: Protection of electronic devices from electrostatic phenomena –

Compliance verification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.99; 29.020 ISBN 978-2-8322-1017-5

– 2 – IEC TS 61340-5-4:2021  IEC 2021
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 12
4 Personnel safety . 13
5 Test methods and test frequency . 13
6 Test equipment . 13
6.1 Selection of test equipment . 13
6.2 AC outlet analyzer (or mains socket tester) . 13
6.3 AC circuit tester (impedance meter) . 14
6.4 Charged plate monitor (CPM) . 14
6.4.1 CPM requirements . 14
6.4.2 Portable CPM kit. 14
6.5 Concentric ring electrode assembly . 14
6.6 Resistance measuring apparatus (ohmmeter) . 14
6.7 Low resistance meter . 15
6.8 Electrostatic field meter . 15
6.9 Electrostatic voltmeter . 15
6.10 Footwear electrode . 15
6.11 Hand-held electrode . 15
6.12 Resistance measurement electrode(s) . 15
6.13 Insulative support surface . 16
6.14 Integrated measurement instrument for wrist strap systems or person-
footwear systems . 16
6.15 Two-point probe . 16
6.16 User specified electrodes . 16
7 Grounding/bonding . 17
7.1 Equipment ground and responsibility for checking systems . 17
7.2 Objective . 17
7.3 Test equipment . 18
7.4 Test procedure for wrist strap bonding points . 18
7.5 Troubleshooting wrist strap bonding point failures . 18
8 Work surfaces . 19
8.1 Basis of test procedure . 19
8.2 Objective . 19
8.3 Test equipment . 19
8.4 Test procedure . 20
8.5 Troubleshooting . 21
8.5.1 Visual and mechanical check . 21
8.5.2 Electrical test . 21
9 Wrist strap system . 22
9.1 Basis of test procedure . 22
9.2 Objective . 22
9.3 Test equipment . 22
9.4 Test procedure . 22

9.4.1 Testing with integrated measurement instrument . 22
9.4.2 Testing with resistance measuring apparatus. 23
9.5 Troubleshooting . 25
10 Person-footwear system . 25
10.1 Basis of test procedure . 25
10.2 Objective . 26
10.3 Test equipment . 26
10.4 Test procedure . 26
10.4.1 Testing with integrated measurement instrument . 26
10.4.2 Testing with resistance measuring apparatus. 26
10.5 Troubleshooting . 27
11 Flooring . 28
11.1 Basis of test procedure . 28
11.2 Objective . 28
11.3 Test equipment . 28
11.4 Test procedure . 28
11.5 Troubleshooting . 29
12 Person-footwear-flooring system measurement of resistance to ground . 29
12.1 Basis of test procedure . 29
12.2 Objective . 29
12.3 Test equipment . 29
12.4 Test procedure . 30
12.5 Troubleshooting . 31
13 Seating . 31
13.1 Basis of test procedure . 31
13.2 Objective . 31
13.3 Test equipment . 31
13.4 Test procedure . 31
13.5 Troubleshooting . 33
14 Air ionizers . 33
14.1 Basis of test procedure . 33
14.2 Objective . 33
14.3 Test equipment . 33
14.4 Test procedure . 34
14.4.1 Initial test set-up . 34
14.4.2 Discharge time test . 34
14.4.3 Offset voltage test (ion balance) . 34
14.5 Troubleshooting . 34
15 Mobile equipment . 35
15.1 Basis of test procedure . 35
15.2 Objective . 35
15.3 Test equipment . 35
15.4 Test procedure . 35
15.5 Troubleshooting . 36
16 Groundable static control garment system . 37
16.1 Basis of test procedure . 37
16.2 Objective . 37
16.3 Test equipment . 37

– 4 – IEC TS 61340-5-4:2021  IEC 2021
16.4 Test procedure . 38
16.4.1 Testing with integrated measurement instrument . 38
16.4.2 Testing with resistance measuring apparatus. 38
16.5 Troubleshooting . 39
17 Static control garments and groundable static control garments. 40
17.1 Point-to-point test method . 40
17.1.1 Basis of test procedure . 40
17.1.2 Objective . 40
17.1.3 Test equipment . 40
17.1.4 Test procedure . 40
17.1.5 Troubleshooting . 41
17.2 Hanging clamp method . 42
17.2.1 Basis of test procedure . 42
17.2.2 Objective . 42
17.2.3 Test equipment . 42
17.2.4 Test procedure . 42
17.2.5 Troubleshooting . 43
18 Packaging . 44
18.1 Basis of test procedure . 44
18.2 Objective . 44
18.3 Test equipment . 44
18.4 Test procedure . 45
18.4.1 Surface resistance using an integrated resistance measuring instrument . 45
18.4.2 Surface resistance using a concentric ring electrode assembly or two
SRBs . 45
18.4.3 Surface resistance using a resistance measuring apparatus and two-
point probe . 46
18.4.4 Point-to-point resistance using a resistance measuring apparatus and
resistance measurement electrodes . 47
18.4.5 Volume resistance using resistance measuring apparatus or integrated
resistance measuring instrument . 48
18.5 Troubleshooting (surface, point-to-point and volume resistance) . 49
19 Process essential insulators . 50
19.1 Basis of test procedure . 50
19.2 Objective . 50
19.3 Test equipment . 50
19.4 Test procedure . 50
19.4.1 Measuring electrostatic field strength at the site of the ESD sensitive
device (ESDS) from electrostatic field source . 50
19.4.2 Measurement of surface voltage of a process essential insulator . 50
19.5 Troubleshooting . 51
20 Process essential isolated conductors . 51
20.1 Basis of test procedure . 51
20.2 Objective . 51
20.3 Test equipment . 51
20.4 Test procedures . 52
20.5 Troubleshooting . 52
Annex A (informative)  Test frequency . 53
Annex B (informative)  Verification of compliance verification test equipment . 54

B.1 General . 54
B.2 Charged plate monitor . 54
B.2.1 Common problems . 54
B.2.2 Basic charged plate monitor checks . 54
B.2.3 Visual checks in the position of measurement . 54
B.3 Electrodes . 55
B.3.1 Common problems . 55
B.3.2 Visual checks . 55
B.3.3 Electrode resistance test . 55
B.3.4 Electrode leakage test . 55
B.3.5 Electrode test with known resistance . 55
B.4 Resistance measuring apparatus . 56
B.4.1 Common problems . 56
B.4.2 Testing for leakage within the meter and leads . 56
B.5 Insulative support surface . 56
B.5.1 Common problems . 56
B.5.2 Testing insulative surface resistance . 56
B.6 Electrostatic field meter . 56
B.6.1 Common problems . 56
B.6.2 Visual and other pre-use checks . 57
B.6.3 Checking field meter grounding . 57
B.6.4 Checking the electrostatic field meter operation . 57
B.7 Electrostatic voltmeter . 58
B.7.1 Common problems . 58
B.7.2 Visual and other pre-use checks . 58
B.7.3 Checking voltmeter grounding . 58
B.7.4 Checking voltmeter operation . 58
Annex C (informative) Other test methods for static control garments . 60
C.1 General considerations for other test methods . 60
C.2 Precautions to be observed when conducting tests . 60
C.3 Tribocharging tests for garments . 60
C.3.1 Objectives . 60
C.3.2 Test equipment for body voltage measurements . 60
C.3.3 Test procedure for body voltage measurements . 61
C.3.4 Test equipment for measuring charge on garments . 64
C.3.5 Test procedure for measuring charge on garments . 65
C.3.6 Test equipment for measuring electrostatic field or surface voltage on
garments . 65
C.3.7 Test procedure for measuring electrostatic field or surface voltage on

garments . 66
C.3.8 Troubleshooting tribocharging tests . 66
C.4 Charge decay time tests for garments . 67
C.4.1 Objective . 67
C.4.2 Test equipment for measuring charge decay time after tribocharging . 67
C.4.3 Test procedure for measuring charge decay time after tribocharging . 67
C.4.4 Test equipment for measuring charge decay time after corona charging . 68
C.4.5 Test procedure for measuring charge decay time after corona charging . 68
C.4.6 Test equipment for measuring charge decay time after connection to a
DC high-voltage supply . 69

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C.4.7 Test procedure for measuring charge decay time after connection to a
DC high-voltage supply . 69
C.5 Field suppression tests for garments . 70
C.6 Capacitance loading tests for garments . 70
Annex D (informative) Person-footwear-flooring system measurement of body voltage . 71
D.1 Basis of test procedure . 71
D.2 Objective . 71
D.3 Test equipment . 71
D.4 Test procedure . 71
D.5 Troubleshooting . 71
Annex E (informative)  Electrical soldering/desoldering hand tools . 73
E.1 Basis of test procedure . 73
E.2 Objective . 73
E.3 Test equipment . 73
E.4 Test procedure . 74
E.4.1 Soldering/desoldering hand tool tip voltage test procedure (hot iron)
using integrated tester or AC millivoltmeter . 74
E.4.2 Soldering/desoldering hand tool resistance to ground (hot iron) . 74
E.4.3 Soldering/desoldering hand tool resistance to ground (cold iron) . 74
E.4.4 Soldering/desoldering hand tool resistance to ground (hot iron) using
low resistance meter . 75
E.5 Troubleshooting . 75
Annex F (informative)  Hand tools . 76
F.1 Basis of test procedure . 76
F.2 Objective . 76
F.3 Test equipment . 76
F.3.1 Resistance measurements . 76
F.3.2 Charge decay time measurements . 76
F.4 Test procedure for hand tool resistance measurements . 76
F.5 Test procedure for hand tool resistance to ground measurements . 77
F.6 Test procedure for charge decay time measurements . 78
F.7 Troubleshooting . 79
Annex G (informative)  Constant (continuous) monitors . 80
G.1 Basis of test procedure . 80
G.2 Objective . 80
G.3 Test equipment . 80
G.4 Test procedure . 80
G.5 Troubleshooting . 80
Annex H (informative)  Gloves and finger cots – In use resistance . 81
H.1 Basis of test procedure . 81
H.2 Objective . 81
H.3 Test equipment . 81
H.4 Test procedure . 81
H.4.1 Integrated measuring instrument for wrist strap systems with a touch
plate and wrist strap . 81
H.4.2 Hand-held electrode and resistance measuring apparatus via wrist strap . 82
H.4.3 Integrated measuring instrument for person-footwear systems with a
touch plate and ESD control footwear . 83
H.4.4 Constant area and force electrode (CAFE) with resistance measuring

apparatus and wrist strap . 83

H.4.5 Troubleshooting . 84
Annex I (informative) Grounding/bonding systems . 85
I.1 Objective . 85
I.2 Test equipment . 85
I.3 Test procedure . 85
I.4 Troubleshooting . 85
Bibliography . 86

Figure 1 – ESD control workstation . 18
Figure 2 – ESD control work surface test . 20
Figure 3 – Point-to-point resistance measurement set-up . 22
Figure 4 – Wrist strap test using integrated measurement instrument . 23
Figure 5 – Wrist strap test using resistance measurement apparatus . 24
Figure 6 – Wrist strap fabric test using resistance measuring apparatus . 24
Figure 7 – Pinched wrist strap fabric test using resistance measuring apparatus . 25
Figure 8 – ESD control footwear test . 27
Figure 9 – ESD control flooring test . 28
Figure 10 – Person-footwear-flooring system test . 30
Figure 11 – ESD control chair test . 32
Figure 12 – ESD control mobile equipment test . 36
Figure 13 – Testing groundable static control garment system in combination with a
person using an integrated measurement instrument . 38
Figure 14 – Test set-up – Groundable garment in combination with a person, hand-held
probe and resistance measurement apparatus . 39
Figure 15 – Garment (point-to-point) test . 41
Figure 16 – Electrodes for hanging garment test . 43
Figure 17 – Hanging clamp resistance measurement . 43
Figure 18 – Set-up for test method using concentric ring electrode assembly and
surface resistance bar electrodes . 46
Figure 19 – Set-up for test method using a resistance measuring apparatus and two-
point probe . 47
Figure 20 – Set-up for test method using two resistance measurement electrodes . 48
Figure 21 – Set-up for test method using resistance measurement electrode or
concentric ring electrode assembly and integrated resistance measuring instrument . 49
Figure C.1 – Example of a test set-up for measuring body voltage whilst removing a

garment . 62
Figure C.2 – Example of a test set-up for measuring body voltage whilst rubbing the
garment under test . 63
Figure C.3 – Example of a test set-up for measuring body voltage on a person rising
from a seat . 64
Figure C.4 – Example of a test set-up for measuring charge on garments . 65
Figure C.5 – Examples of test set-ups for measuring charge decay time on garments
as worn and on a bench-top after tribocharging . 68
Figure C.6 – Example of test set-up for measuring charge decay time after connecting
a garment to a DC high-voltage supply . 70
Figure E.1 – Soldering iron resistance and tip voltage measurements . 74
Figure F.1 – Hand tool resistance measurement . 77

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Figure F.2 – Hand tool resistance to ground measurement . 78
Figure F.3 – Hand tool charge decay time measurement . 79
Figure H.1 – Wrist strap test wearing a glove using integrated measurement
instrument . 82
Figure H.2 – Glove test with hand-held electrode and resistance measuring apparatus

via wrist strap . 83
Figure H.3 – Test wearing a glove using constant area and force electrode . 84

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROSTATICS –
Part 5-4: Protection of electronic devices from
electrostatic phenomena – Compliance verification

FOREWORD
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC TS 61340-5-4 has been prepared by IEC technical committee 101: Electrostatics. It is a
Technical Specification.
This first edition cancels and replaces IEC TR 61340-5-4 published in 2019. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to
IEC TR 61340-5-4:
a) test methods in the main body of the document have been made normative, and
consequently normative references have been added;
b) the term "ESD ground" has been added and defined;
c) description of equipment for measuring low resistance has been added;
d) user specified electrodes, including surface resistance bar electrodes, are permitted to be
used for resistance measurements;

– 10 – IEC TS 61340-5-4:2021  IEC 2021
e) an informative annex on verification of compliance verification test equipment has been
added;
f) compliance verification of person-footwear-flooring systems by measuring body voltage has
been moved to an informative annex.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
101/615/DTS 101/627A/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 61340 series, published under the general title Electrostatics, can
be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

INTRODUCTION
Compliance verification is the process of monitoring and measuring all elements of an ESD
control program. Regular compliance verification checks and tests are an essential part of this
process, ensure that area precautions and equipment remain effective, and that an ESD control
program is correctly implemented in compliance with an ESD control program plan.
Qualification testing is typically carried out under controlled conditions, often in a laboratory
environment, and using industry recognized standards. Compliance verification testing is
carried out under operational conditions using test methods that are appropriate to a user's
requirements. Although qualification test methods can be used, compliance verification testing
often uses simple equipment and procedures. Accuracy is still important, but of equal
importance is the ability to carry out non-
...