IEC 61340-4-6:2015

IEC 61340-4-6 ®
Edition 2.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrostatics –
Part 4-6: Standard test methods for specific applications – Wrist straps

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

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IEC 61340-4-6 ®
Edition 2.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrostatics –
Part 4-6: Standard test methods for specific applications – Wrist straps

Électrostatique –
Partie 4-6: Méthodes d’essai normalisées pour des applications spécifiques –

Bracelets de conduction dissipative

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99; 29.020 ISBN 978-2-8322-2675-9

– 2 – IEC 61340-4-6:2015  IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Terms and definitions . 7
3 Testing levels and performance limits . 8
4 Test methods . 9
4.1 Test method applications . 9
4.2 Wrist strap continuity and resistance test . 10
4.2.1 Purpose of test . 10
4.2.2 Equipment . 10
4.2.3 Procedure . 11
4.2.4 Reporting . 11
4.3 Band resistance test . 11
4.3.1 Purpose of test . 11
4.3.2 Equipment . 11
4.3.3 Procedure (interior resistance) . 12
4.3.4 Procedure (exterior resistance) . 12
4.3.5 Reporting . 12
4.4 Band size requirements . 12
4.4.1 Purpose of test . 12
4.4.2 Equipment . 12
4.4.3 Self-adjusting bands . 12
4.4.4 “One-size-fits-all” bands . 13
4.5 Breakaway force . 13
4.5.1 Purpose of test . 13
4.5.2 Breakaway force measurement . 13
4.6 Connection integrity . 13
4.6.1 Purpose of test . 13
4.6.2 Equipment . 13
4.6.3 Procedure . 13
4.6.4 Reporting . 14
4.7 Ground cord extendibility . 14
4.7.1 Purpose of test . 14
4.7.2 Ground cord extendibility procedure . 14
4.8 Bending life test . 14
4.8.1 Purpose of test . 14
4.8.2 Equipment . 14
4.8.3 Procedure . 15
4.8.4 Reporting . 16
4.9 Manufacturer’s identification . 16
4.10 Identification of non-standard resistance value . 16
4.11 Wrist strap resistance . 16
4.11.1 Purpose of test . 16
4.11.2 Equipment . 16
4.11.3 Procedure . 16

4.11.4 Reporting . 16
4.12 Wrist strap system continuity test . 16
4.12.1 Purpose of test . 16
4.12.2 Equipment . 17
4.12.3 Procedure with ohmmeter . 18
4.12.4 Procedure with integrated checker . 18
4.12.5 Reporting . 18
Bibliography . 19

Figure 1 – Wrist strap resistance test apparatus . 11
Figure 2 – Mechanical ground cord flex tester (example) . 15
Figure 3 – Wrist strap system resistance test . 18

Table 1 – Evaluation testing . 9
Table 2 – Acceptance testing . 9
Table 3 – Periodic or verification testing . 9

– 4 – IEC 61340-4-6:2015  IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROSTATICS –
Part 4-6: Standard test methods for specific
applications – Wrist straps
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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.
International Standard IEC 61340-4-6 has been prepared by IEC technical committee 101:
Electrostatics.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) editorial comments made during the review of the first edition were reviewed and
incorporated where appropriate;
b) several changes were made to update the Figures and improve the presentation of metric
measurements (Imperial measurements have been removed);

c) the option of using an integrated checker for wrist strap system continuity testing has been
added;
d) the evaluation and acceptance limit for wrist strap resistance has been changed so as to
harmonize with IEC 61340-5-1.
The text of this standard is based on the following documents:
FDIS Report on voting
101/463/FDIS 101/476/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61340 series, under the general title Electrostatics, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 61340-4-6:2015  IEC 2015
INTRODUCTION
This part of IEC 61340 has been developed to establish test methods for evaluating the
electrical and mechanical attributes of wrist straps used in an electrostatic control program.
Wrist straps are intended to connect the user to electrical ground, thus preventing
electrostatic charge on a user’s body from attaining a level that may damage ESD susceptible
devices or assemblies.
Test methods and performance limits for evaluation, acceptance, and functional testing are
provided.
ELECTROSTATICS –
Part 4-6: Standard test methods for specific
applications – Wrist straps
1 Scope
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.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
wrist strap
assembled device consisting of a band and ground cord that is designed to provide electrical
connection from a person’s skin to ground
2.2
wrist strap system
wrist strap when properly worn by a person, where the electrical path includes the person, the
band and the ground cord
2.3
band
portion of the wrist strap worn on the wrist
Note 1 to entry: The band maintains electrical contact with a person’s skin.
2.4
ground cord
portion of the wrist strap that provides flexibility of movement while completing the electrical
circuit between the band and ground
2.5
evaluation testing
testing of a wrist strap to determine its electrical and mechanical performance abilities
Note 1 to entry: Data are in the form of values from laboratory testing.
2.6
acceptance testing
incoming tests to confirm proper marking and electrical functionality
Note 1 to entry: Data are in the form of visual inspection records and values or pass/fail notation.

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

Table 1 – Evaluation testing
Electrical Limit Test reference
Wrist strap continuity and resistance < 5 MΩ , or user defined value 4.2
Band resistance Interior: ≤ 100 kΩ or user defined value
4.3
Exterior:
> 10 MΩ
Mechanical Limit Test reference
Band size As defined in 4.4 4.4
Breakaway force > 4,4 N and < 22,6 N 4.5
Cord and connector integrity > 22,6 N and > 66 % of cord strength 4.6
Ground cord extendibility Extension to manufacturer’s specified length
4.7
with no loss of electrical continuity
Bending life 4.8
≥ 16 000 cycles
Marking Limit Test reference
Manufacturer’s identification Logo and/or name 4.9
Identification of non-standard resistance Prominent feature or value marked 4.10
value
Table 2 – Acceptance testing
Electrical Limit Test reference
Wrist strap resistance
< 5 MΩ, or user defined value 4.11

Marking Limit Test reference
Manufacturer’s identification Logo and/or name 4.9
Identification of non-standard Resistance Prominent feature or value marked 4.10
value
Table 3 – Periodic or verification testing
Electrical Limit Test reference
a
Wrist strap system continuity (as worn) 4.12
≤ 35 MΩ, or user defined value
a
A user defined lower limit of resistance may be required for safety or other considerations.

4 Test methods
4.1 Test method applications
Refer to Tables 1, 2 and 3 for test method applications.
WARNING: Test procedures described in this standard may expose personnel to potentially
hazardous electrical conditions. Appropriate electrical hazard reduction practices should be
exercised and proper earthing instructions for the equipment used should be followed when
performing tests.
– 10 – IEC 61340-4-6:2015  IEC 2015
4.2 Wrist strap continuity and resistance test
4.2.1 Purpose of test
This test measures the value of the current-limiting resistance and assures continuity between
the discrete parts of the wrist strap.
4.2.2 Equipment
The equipment shall consist of the following:
• a test fixture (see Figure 1) comprising an insulative stand and two (25,0 ± 0,5) mm
diameter stainless steel cylinders, with one cylinder fixed to the stand directly above
the second. The second cylinder with a mass of (0,11 ± 0,01) kg is mounted in a slot in
the stand that allows free vertical movement;
• an ohmmeter or other instrument(s) capable of reading from 50 kΩ to at least 100 MΩ
with a test voltage of 7 V to 100 V DC open circuit;
• six samples of wrist straps.

140 mm
100 mm
IEC
Figure 1a – Band test fixture construction

10 mm
120 mm
IEC
Figure 1b – Test method
Key
4 insulative stand
1 fixed metal cylinder test probe, (25,0 ± 0,5) mm diameter
5 ohmmeter
2 hole for banana plug
6 band
3 movable metal cylinder test weight, (25,0 ± 0,5) mm diameter
Figure 1 – Wrist strap resistance test apparatus
4.2.3 Procedure
Using the test fixture shown in Figure 1, place the band around the cylinders with the band
interior toward the cylinders and the ground cord connector on the right side and parallel to
the cylinders, evenly spaced between the cylinders. Allow the 0,11 kg cylinder to move freely
and stress the band.
Connect the ground cord to the band.
Connect the ohmmeter to the top cylinder and to the ground connector of the ground cord.
Measure and record the resistance value.
Repeat the procedure for a total of six wrist straps.
4.2.4 Reporting
Report the resistance for each wrist strap.
4.3 Band resistance test
4.3.1 Purpose of test
Resistance of the band interior and exterior is determined.
4.3.2 Equipment
See 4.2.2.
– 12 – IEC 61340-4-6:2015  IEC 2015
4.3.3 Procedure (interior resistance)
Using the test fixture shown in Figure 1, place the band around the cylinders with the band
interior toward the cylinders and the ground cord connector on the right side and parallel to
the cylinders, evenly spaced between the cylinders. Allow the 0,11 kg cylinder to move freely
and stress the band.
Connect the ohmmeter to the top cylinder and to the ground cord connector on the band.
Measure and record the resistance value.
Repeat the procedure for a total of six bands.
4.3.4 Procedure (exterior resistance)
Using the test fixture shown in Figure 1, place the band around the cylinders with the band
exterior toward the cylinders and the ground cord connector on the right side and parallel to
the cylinders, evenly spaced between the cylinders. Allow the 0,11 kg cylinder to move freely
and stress the band.
Connect the ohmmeter to the top cylinder and the ground cord connector on the band.
Measure and record the resistance value.
Repeat the procedure for a total of six bands.
4.3.5 Reporting
Report the interior resistance and exterior resistance of each band.
4.4 Band size requirements
4.4.1 Purpose of test
Band sizes are determined by the band’s ability to fit over a specifically sized cylinder. A
band’s ability to expand to fit over a hand, yet contract to fit correctly around a wrist is
determined by fitting the band over specifically sized large and small cylinders.
NOTE A band is fitted correctly when it is sufficiently tight to maintain electrical continuity during normal wearing
conditions, but not so tight as to cause discomfort or harm to the wearer.
4.4.2 Equipment
The equipment shall consist of the following:
• 1 cylinder having an outside diameter of (4,3 ± 0,1) cm;
• 1 cylinder having an outside diameter of (5,3 ± 0,1) cm;
• 1 cylinder having an outside diameter of (8,25 ± 0,1) cm;
• 1 cylinder having an outside diameter of (8,9 ± 0,1) cm.
4.4.3 Self-adjusting bands
“Large”-sized self-adjustable expanding metal or fabric bands shall make 360° contact with a
5,3 cm diameter cylinder, and be capable of fitting over an 8,9 cm diameter cylinder.
“Small”-sized self-adjustable expanding metal or fabric bands shall make 360° contact with a
4,3 cm diameter cylinder, and be capable of fitting over an 8,25 cm diameter cylinder.

4.4.4 “One-size-fits-all” bands
“One-size-fits-all” bands shall make 360° contact on a 4,3 cm diameter cylinder and be
capable of sufficient expansion to fit over an 8,9 cm cylinder.
4.5 Breakaway force
4.5.1 Purpose of test
For personnel safety considerations, the wrist strap ground cord shall disconnect from the
band while worn in the event of an emergency. However, the ground cord shall remain
connected during normal use. The breakaway force of the cord from the band is measured in
the following procedure.
4.5.2 Breakaway force measurement
With the ground cord connected to the band in a normal manner and the band held in a fixture
or by hand, a force of > 4,4 N and < 22,6 N applied to the ground cord, perpendicular to the
band back plate shall be required to separate the ground cord from the band.
Given the variation of the design of wrist straps, it is not possible to provide a detailed
description of the test procedure. Nevertheless, users of this standard shall adapt procedures
to suit the design of wrist straps that are in use, and shall describe these procedures as far as
possible in test reports. Variations in test procedures may be significant when evaluating
sample test results that are close to acceptance limits.
4.6 Connection integrity
4.6.1 Purpose of test
The strength of the wire used as a ground cord is measured to the breaking point. The
strengths of the mechanical connections between the wire and the terminals used for ground
connection and band connection are measured.
4.6.2 Equipment
The equipment shall consist of the following:
• tensile tester capable of 6,35 cm per minute travel;
• clamps (grippers) for tensile tester;
• chart recorder or data logging device.
Given the variation in the design of wrist straps, it is not possible to provide full details of the
use of tensile testers. Nevertheless, users of this standard shall adapt procedures to suit the
design of the wrist strap that is in use, and shall include the following information in test
reports: type of clamps, clamping force, specimen length between clamps, and rate of
extension. Variations in test procedures may be significant when evaluating sample test
results that are close to acceptance limits.
4.6.3 Procedure
4.6.3.1 General
Using the tensile tester and chart recorder or data logging device, test and record the tensile
strength (breaking point) of the ground cord, the ground connector to the ground cord, and the
band connector to the cord. Repeat the procedure for a total of six ground cords.
This is a test to failure so sufficient numbers of test samples should be on hand to complete
the evaluation.
– 14 – IEC 61340-4-6:2015  IEC 2015
4.6.3.2 Wire break strength
The ground cord under test is secured in the tensile tester by clamps gripping the wire
between a straight section of wire (not including the wire terminations). The tensile tester is
then activated and the wire pulled to the breaking point.
4.6.3.3 Ground cord termination strength
The ground cord under test is secured in the tensile tester so that the wire is clamped in one
gripper and one termination end of the ground cord is clamped in the other gripper. The
tensile tester is then activated and the ground cord stressed until the termination breaks or is
separated from the wire.
The same ground cord that is used in 4.6.3.2 may be used if sufficient wire length is available
for clamping in the tensile tester.
4.6.4 Reporting
Report the break strength of the wire and the break strength or pull off force of both
terminations. Calculate the percentage of the termination strength to wire strength by the
following formula:
Termination break or pull-off point/wire break strength × 100 = % Termination strength.
4.7 Ground cord extendibility
4.7.1 Purpose of test
Retractable-type ground cords (coiled cords) shall be capable of being extended to the
manufacturer’s specified working length (typically 1,5 m or 3,0 m) without pulling the band
away from the user’s wrist to the extent that electrical continuity, as measured in 4.11, is
interrupted.
4.7.2 Ground cord extendibility procedure
While wearing the wrist strap assembly and performing the wrist strap system continuity test
as described in 4.11, extend the distance between the wrist band and the integrated checker
or ohmmeter to the wrist strap manufacturer’s specified working length of the ground cord.
This test may require two people to prevent dropping the instruments used for measuring the
electrical continuity of the wrist strap system.
4.8 Bending life test
4.8.1 Purpose of test
Ground cord flex life is determined.
4.8.2 Equipment
The equipment shall consist of the following:
• mechanical ground cord flex tester: machine that drives a stressing mechanism
through an arc of 120°±5°at a rate of approximately 2 000 cycles per hour (see Figure
2 for an example of a flex tester);
NOTE 1 A flex tester designed to test more than one ground cord at a time is acceptable. Some testers
have been constructed that can test both ends of a ground cord or multiple ground cords at the same time.
NOTE 2 Ground cords are attached to the stressing mechanism by means of a mounting that simulates
the band connector (i.e. a snap) and the ground connector (i.e. a banana plug jack).

• a (0,45 ± 0,1) kg weight;
• an ohmmeter or other instrument(s) capable of reading from 50 kΩ to at least 100 MΩ
with a test voltage of 7 V to 100 V DC open circuit.
IEC
Key
1 ohmmeter, 7 V to 100 V DC open circuit 7 stressing mechanism
1a low input 8 mounting fixture
1b high input 9 banana plug termination (see NOTE 1)
2 female snap fastener termination (see NOTE 1) 10 mechanical counter (see NOTE 2)
3 wrist strap cord 11 mounting screw
4 motor control box 12 weight – (0,45 ± 0,1) kg rigidly attached to wrist
strap cord approximately 15 cm from cord
5 30 r/min motor
termination
6 rotating disc
NOTE 1 Figure shows test of banana plug termination; repeat with female snap fastener termination.
NOTE 2 One stress cycle is the equivalent of one revolution of the rotating disc.
Figure 2 – Mechanical ground cord flex tester (example)
4.8.3 Procedure
Attach one end of a ground cord to a stressing mechanism. Connect the opposite end to a
0,45 kg weight and allow the ground cord to hang freely. Connect the resistance monitoring
cable to the ground cord conductor at the weighted end.

– 16 – IEC 61340-4-6:2015  IEC 2015
Start the flex tester. Six cords shall be tested with the band connection attached to the
stressing mechanism and six cords shall be tested with the ground connection attached to the
stressing mechanism.
4.8.4 Reporting
Ground cord failure is defined as the total resistance of the circuit exceeding the user defined
value, or when there is visible evidence of mechanical failure in the cord jacket or strain relief.
Each ground cord shall have a minimum life of at least 8 000 cycles and the average of all
samples tested shall have a minimum life of 16 000 cycles.
4.9 Manufacturer’s identification
Wrist straps shall have the manufacturer’s name or logo embossed, moulded or otherwise
permanently marked in a prominent location.
4.10 Identification of non-standard resistance value
Wrist straps incorporating a resistance of non-standard value (other than 1,0 MΩ with a
relative tolerance of ± 20 %), shall be identified by having a prominent feature or the resistor
value, marked on the ground cord, or on the wrist strap component that contains the
resistance (generally the ground cord).
4.11 Wrist strap resistance
4.11.1 Purpose of test
Resistance of the wrist strap is determined.
4.11.2 Equipment
The equipment shall consist of the following:
• an ohmmeter or other instrument(s) capable of reading from 50 kΩ to at least 100 MΩ
with a test voltage of 7 V to 100 V DC open circuit.
4.11.3 Procedure
Connect the band to the ground cord. Attach the ground cord termination end to an ohmmeter
lead (typically using an alligator clip). Place the band on an insulating surface with the skin
contact area of the band facing up. For bands with a metal skin contact plate, touch the skin
contact area of the band with the other ohmmeter lead probe using hand pressure. For bands
that do not have a metal plate for skin contact, increase the ohmmeter probe contact area by
placing a metal disc (conductive coin or other 12 mm nominal diameter disc) on the band
interior and contact the disc with the other ohmmeter lead probe using hand pressure.
Measure the resistance of the wrist strap. Repeat the test for a total of six wrist straps.
4.11.4 Reporting
Report the resistance value of each wrist strap. Discrete current-limiting resistors should be
located near the connection between the ground cord and the band.
4.12 Wrist strap system continuity test
4.12.1 Purpose of test
This verifies the acceptability of the resistance path of the wrist strap system using an
integrated wrist strap checker or an ohmmeter. This test shall be performed with the wrist
strap on the intended user(s) wrist. This test includes the wrist strap user’s resistance as part
of the total system resistance.

4.12.2 Equipment
The equipment shall consist of the following:
• an ohmmeter or integrated checker capable of reading from 50 kΩ to at least 100 MΩ
with a test voltage of 7 V to 100 V DC open circuit, current limited to < 0,05 mA;
• a stainless steel cylinder (15,0 ± 0,1) cm in length and (2,5 ± 0,1) cm in diameter (only
required if using an ohmmeter, see Figure 3a).
1 2
IEC
Figure 3a – Test using ohmmeter
IEC
Figure 3b – Test using integrated checker

– 18 – IEC 61340-4-6:2015  IEC 2015
Key
1 band 5 ground cord
2 hand-held stainless steel electrode 6 integrated checker
3 ohmmeter 7 contact area
4 ohmmeter lead
Figure 3 – Wrist strap system resistance test
4.12.3 Procedure with ohmmeter
Place the band on the user’s wrist, attach the ground cord to the band, and attach the ground
cord to the common terminal (-) of the ohmmeter. Connect the stainless steel cylinder to the
positive terminal (+) of the ohmmeter. Grasp the cylinder with the hand closest to the band.
Measure and record the resistance of the wrist strap system (see Figure 3a).
4.12.4 Procedure with integrated checker
Place the band on the user’s wrist, attach the ground cord to the band and attach the other
end of the ground cord to the integrated checker. Touch the contact area on the integrated
checker with the fingers on the hand closest to the band and activate the integrated checker
following the manufacturer’s instructions. Record the resistance or the “pass” or “fail”
indication (see Figure 3b).
4.12.5 Reporting
It is necessary to determine the resistance level for the pass and fail indications of the
integrated checker to ensure that the requirements of the end user are met with regards to
personnel grounding through the wrist strap system. Then, a “pass” indication from the
integrated checker indicates that the resistance of the wrist strap system is acceptable for use.
A value of ≤ 35 MΩ or a reading falling within the user-specified resistance range indicates
that the wrist strap system is acceptable for use.

Bibliography
[1] IEC 61340-5-1, Electrostatics – Part 5-1: Protection of electronic devices from
electrostatic phenomena – General requirements
[2] IEC TR 61340-5-2, Electrostatics – Part 5-2: Protection of electronic devices from
electrostatic phenomena – User guide
[3] ANSI/ESD S1.1:2006, Wrist straps

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– 20 – IEC 61340-4-6:2015  IEC 2015
SOMMAIRE
AVANT-PROPOS . 22
INTRODUCTION . 24
1 Domaine d’application . 25
2 Termes et définitions . 25
3 Niveaux d’essai et limites de performances . 26
4 Méthodes d’essai . 27
4.1 Applications des méthodes d’essai . 27
4.2 Essai de continuité et de résistance du bracelet de conduction dissipative. 28
4.2.1 Objectif de l’essai . 28
4.2.2 Equipement . 28
4.2.3 Mode opératoire . 29
4.2.4 Rapport . 29
4.3 Essai de résistance de la bande . 29
4.3.1 Objectif de l’essai . 29
4.3.2 Equipement . 29
4.3.3 Mode opératoire (résistance intérieure) . 30
4.3.4 Mode opératoire (résistance extérieure). 30
4.3.5 Rapport . 30
4.4 Exigences concernant la taille de la bande . 30
4.4.1 Objectif de l’essai . 30
4.4.2 Equipement . 30
4.4.3 Bandes auto-ajustables .
...