Organic light emitting diode (OLED) light sources for general lighting - Safety - Part 2-3: Particular requirements - Flexible OLED tiles and panels

IEC 62868-2-3:2021 specifies the safety requirements for flexible organic light emitting diode tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar general lighting purposes and designed for being bent during the manufacturing process of curved luminaires.

Sources lumineuses à diodes électroluminescentes organiques (OLED) destinées à l'éclairage général - Sécurité - Partie 2‑3: Exigences particulières - Dalles et panneaux OLED flexibles

L'IEC 62868-2-3:2021 spécifie les exigences de sécurité des dalles et panneaux à diodes électroluminescentes organiques flexibles destinés à être utilisés avec des alimentations jusqu'à 120 V en courant continu sans ondulation pour l'éclairage général intérieur ou similaire, et conçus pour être pliés pendant le processus de fabrication de luminaires incurvés.

General Information

Status
Published
Publication Date
12-Oct-2021
Current Stage
PPUB - Publication issued
Completion Date
13-Oct-2021
Ref Project

Buy Standard

Standard
IEC 62868-2-3:2021 - Organic light emitting diode (OLED) light sources for general lighting - Safety - Part 2-3: Particular requirements - Flexible OLED tiles and panels
English and French language
29 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 62868-2-3
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside

Organic light emitting diode (OLED) light sources for general lighting – Safety –

Part 2-3: Particular requirements – Flexible OLED tiles and panels
Sources lumineuses à diodes électroluminescentes organiques (OLED)
destinées à l'éclairage général – Sécurité –
Partie 2-3: Exigences particulières – Dalles et panneaux OLED flexibles
IEC 62868-2-3:2021-10(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

variety of criteria (reference number, text, technical publications previews. With a subscription you will always

committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.

and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC online collection - oc.iec.ch

webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez

La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un

en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour

comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 62868-2-3
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside

Organic light emitting diode (OLED) light sources for general lighting – Safety –

Part 2-3: Particular requirements – Flexible OLED tiles and panels
Sources lumineuses à diodes électroluminescentes organiques (OLED)
destinées à l'éclairage général – Sécurité –
Partie 2-3: Exigences particulières – Dalles et panneaux OLED flexibles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.99 ISBN 978-2-8322-1036-2

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62868-2-3:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 General ........................................................................................................................... 7

4.1 General requirements ............................................................................................. 7

4.2 General test requirements ....................................................................................... 7

5 Marking ........................................................................................................................... 8

5.1 Contents and location ............................................................................................. 8

5.2 Durability and legibility of marking ........................................................................... 8

6 Construction .................................................................................................................... 8

6.1 General ................................................................................................................... 8

6.2 Mechanical strength ................................................................................................ 8

6.2.1 Requirements .................................................................................................. 8

6.2.2 Vibration test ................................................................................................... 8

6.2.3 Strength and impact test .................................................................................. 9

6.3 Internal short circuit .............................................................................................. 10

6.4 Wireways .............................................................................................................. 10

6.5 Resistance to dust, solid objects and moisture ...................................................... 10

7 Mechanical hazard ........................................................................................................ 10

8 Fault conditions ............................................................................................................. 10

8.1 General ................................................................................................................. 10

8.2 Overpower condition ............................................................................................. 11

8.3 Input stability test .................................................................................................. 11

8.4 Overbending ......................................................................................................... 11

8.5 Excess bending cycles .......................................................................................... 11

9 Insulation resistance and electric strength ..................................................................... 11

9.1 Insulation resistance ............................................................................................. 11

9.2 Electric strength .................................................................................................... 11

10 Thermal stress ............................................................................................................... 11

11 Creepage distances and clearances .............................................................................. 11

12 Resistance to heat and fire ............................................................................................ 12

12.1 Resistance to heat ................................................................................................ 12

12.2 Resistance to fire .................................................................................................. 12

13 Photobiological safety .................................................................................................... 12

14 Terminals ...................................................................................................................... 12

15 Information for luminaire design ..................................................................................... 12

Annex A (informative) Construction of flexible OLED tiles and panels .................................. 13

Annex B (normative) Classification of flexible OLED tiles and panels ................................... 14

Bibliography .......................................................................................................................... 15

Figure A.1 – Schematic diagram of glass flexible OLED tile for lighting ................................. 13

Figure A.2 – Schematic diagram of film flexible OLED panel for lighting ................................ 13

---------------------- Page: 4 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 3 –

Table 1 – Additional marking ................................................................................................... 8

Table 2 – Mechanical attributes and measurement methods ................................................... 9

Table B.1 – Flexible OLED classification ............................................................................... 14

---------------------- Page: 5 ----------------------
– 4 – IEC 62868-2-3:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
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, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely 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

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

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.

IEC 62868-2-3 has been prepared by subcommittee 34A: Electric light sources, of IEC technical

committee 34: Lighting. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
34A/2254/FDIS 34A/2261/RVD

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 International Standard is English.
---------------------- Page: 6 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 5 –

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 62868 series, published under the general title Organic light emitting

diode (OLED) light sources for general lighting – Safety, can be found on the IEC website.

This International Standard is to be used in conjunction with IEC 62868-1:2020.
In this document, the following print type is used:
– compliance statements: in italic type.

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.
---------------------- Page: 7 ----------------------
– 6 – IEC 62868-2-3:2021 © IEC 2021
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
1 Scope

This part of IEC 62868 specifies the safety requirements for flexible organic light emitting diode

tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar general

lighting purposes and designed for being bent during the manufacturing process of curved

luminaires.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 61747-40-1:2019, Liquid crystal display devices – Part 40-1: Mechanical testing of display

cover glass for mobile devices – Guidelines

IEC 62504, General lighting – Light emitting diode (LED) products and related equipment –

Terms and definitions

IEC 62715-6-3:2020, Flexible display devices – Part 6-3: Mechanical test methods – Impact

and hardness tests

IEC 62868-1:2020, Organic light emitting diode (OLED) light sources for general lighting –

Safety – Part 1: General requirements and tests

IEC TS 62972:2016, General lighting – Organic light emitting diode (OLED) products and

related equipment – Terms and definitions
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 62504, IEC 62868-1

and IEC TS 62972 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
flexible OLED

OLED that is mechanically bendable in one or more of the steps of substrate handling,

manufacturing, storage, use, operation, shipping, and relocation
---------------------- Page: 8 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 7 –
3.2
flexible OLED tile

smallest functional flexible OLED which cannot be separated into smaller flexible OLED lighting

elements containing at least one contact ledge with at least one positive and one negative pole

for connection to the electrical power supply
3.3
flexible OLED panel

independently operable unit flexible OLED product containing a flexible OLED tile and means

of connection to the electrical supply such as a connector, printed circuit board (PCB), passive

electronic components and optionally a frame
3.4
glass-based flexible OLED

flexible OLED light source having a substrate and/or encapsulation material that are composed

of thin glass
3.5
film-based flexible OLED

flexible OLED light source having components that are made of either barrier film or metal foil

3.6
barrier film
film that keeps water vapour out of an OLED light source
3.7
minimum bending radius

limit radius to which the flexible panel may be bent in either a convex or concave

curvature without damaging the panel
3.8
maximum bending cycle

maximum number of times a flexible panel may be bent without damaging the panel

3.9
as-received

representative of standard sample preparation and handling practices, and therefore free of

intentional mechanical damage such as abrasion, scratching, or indentation

Note 1 to entry: The strength of glass is not an intrinsic material property, and like other brittle elastic materials, is

highly dependent upon the surface flaw population. The term "as-received" is meant to represent the surface

condition upon specimen receipt and is distinguished from a condition where damage has been intentionally

introduced prior to testing.
[SOURCE: IEC 61747-40-1:2019, 3.2]
4 General
4.1 General requirements
The requirements of IEC 62868-1:2020, 4.1 apply.
4.2 General test requirements
The requirements of IEC 62868-1:2020, 4.2 apply.
---------------------- Page: 9 ----------------------
– 8 – IEC 62868-2-3:2021 © IEC 2021

The tests shall be carried out using a flexible OLED panel bent with the minimum bending radius

specified by the manufacturer. For those flexible panels which are specified for a specific

curvature, the test shall be conducted using the shape and condition specified by the

manufacturer in the installation instructions.

Stabilization shall be conducted in the same conditions, for example the position and flat or

bent, as the tests.
5 Marking
5.1 Contents and location

The requirements of IEC 62868-1:2020, 5.1 apply. IEC 62868-1:2020, Table 1 applies together

with Table 1 of this document.
Table 1 – Additional marking
Packaging
Parameters Product or
product datasheet or leaflet
Mandatory
Flexible OLED classification
Mandatory
Minimum bending radius
Mandatory
Maximum bending cycles
See Table B.1 for flexible OLED classification.
These values can be different from those of the performance.
5.2 Durability and legibility of marking
The requirements of IEC 62868-1:2020, 5.2 apply.
6 Construction
6.1 General
The requirements of IEC 62868-1:2020, 6.1 apply.
The construction of flexible OLED tiles and panels is illustrated in Annex A.
6.2 Mechanical strength
6.2.1 Requirements

The OLED panel shall have sufficient mechanical strength which shall be checked by 6.2.2 and

6.2.3.
6.2.2 Vibration test

Compliance is checked by carrying out the test in accordance with IEC 62868-1:2020, 6.2.

---------------------- Page: 10 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 9 –
6.2.3 Strength and impact test

The strength and impact test shall be conducted depending on the classification of the OLED

panel (see Annex B and Table B.1).
a) Glass-based flexible OLED product

The strength and impact test shall be conducted according to Table 2, in accordance with

IEC 61747-40-1:2019, 5.1, 5.2 and 5.4.

Test (1) shall be conducted if the edges of bare panels are exposed after installation in the

luminaire. As long as the panel is installed into the luminaire and no edge has been exposed,

this test is not mandatory.

Where no glass edge is exposed, such as being installed into a luminaire or being covered with

protecting films, tests (2) and (3) shall be conducted.

Where no glass surface is exposed, such as being installed into a luminaire or being covered

with protecting films, tests (1) and (2) shall be conducted.
Table 2 – Mechanical attributes and measurement methods
Test Failure Failure Subject Attribute Test method Unit Corresponding
location mechanism (typical) document
(1) Edge Overstress As-received Edge Uniaxial MPa IEC 61747-40-2
of edge glass strength flexure
flaws strength
(four-point
bend)
(2) Surface Overstress As-received Surface Biaxial J IEC 61747-40-3
from blunt glass impact flexure
impact resistance energy-to-
failure (ball
drop)
(3) Surface Overstress As-received Surface Biaxial N IEC 61747-40-4
of surface glass strength flexure stress
flaws (ring-on-ring)
Sharp As-received Resistance Sharp contact
(4) Surface J IEC 61747-40-5
contact glass against impact under
damage surface rigid support
introduction sharp condition
propagated contact (ball drop on
coated
by central damage and
tension propagation abrasives)
under rigid under rigid
support support
condition condition
(5) Surface Sharp Abraded glass Retained Abraded N IEC 61747-40-6
contact strength biaxial
damage in flexural
combination strength
with or (abraded
followed ring-on-ring)
immediately
by flexural
stress
NOTE This table is reproduced from IEC 61747-40-1:2019, Table 1.
---------------------- Page: 11 ----------------------
– 10 – IEC 62868-2-3:2021 © IEC 2021
Compliance:
Compliance is checked by carrying out the following tests specified in Table 2.

After each test, the OLED panel is checked by inspection. As the inside of the panel might have

been damaged, conducting fault condition check is desirable. Fault condition is checked in

accordance with 8.1. The OLED product shall be deemed to have failed the test if:

• any of the glass is splintered or broken,
• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
b) Film-based flexible OLED panel

Impact testing for film-based flexible OLED panels shall be carried out by the following tests, in

accordance with IEC 62715-6-3:2020, 6.2 to 6.5:
• ball drop test;
• hitting test;
• pendulum side impact test;
• scratch and abrasion test.
Compliance:

After the tests, the OLED panel shall be checked by inspection. As the inside of the panel might

have been damaged, conducting a fault condition check is desirable. Fault condition is checked

in accordance with 8.1. The OLED panel shall be deemed to have failed the test if:

• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
6.3 Internal short circuit
The requirements of IEC 62868-1:2020, 6.3 apply.
6.4 Wireways
The requirements of IEC 62868-1:2020, 6.4 apply.
6.5 Resistance to dust, solid objects and moisture
The requirements of IEC 62868-1:2020, 6.5 apply.
7 Mechanical hazard
The requirements of IEC 62868-1:2020, Clause 7 apply.
8 Fault conditions
8.1 General

An OLED panel shall not impair safety under fault conditions that may occur during the intended

use.
---------------------- Page: 12 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 11 –

Fault condition tests shall be conducted at an ambient temperature of (25 ± 5) °C unless

otherwise specified by the manufacturer or responsible vendor. The temperature shall be

maintained within ±2 °C during the test.
8.2 Overpower condition
The requirements and compliance of IEC 62868-1:2020, Clause 8 apply.
8.3 Input stability test

The flexible OLED panel shall be operated with the rated current. The input power and voltage

shall be monitored at the input side. The test shall be continued for 15 min.
Compliance:

The voltage shall remain within the range of the rated voltage ±10 % during the test.

8.4 Overbending

Overbending tests shall be conducted under a bending radius 70 % smaller than the minimum

bending radius specified by the manufacturer.
Compliance:

After the test, the OLED panel is checked by inspection. Any splintered or broken glass is not

accepted (for glass-based flexible OLED panel). Fire, smoke or flammable gas shall not be

produced. The OLED panel shall have no loosened parts which could impair safety.
8.5 Excess bending cycles

The OLED product shall be repeatedly bent for at least 1,5 times of the maximum bending

cycles.
Compliance:

After the test, the OLED panel is checked by inspection. The glass-based flexible OLED panel

shall not have any splintered or broken glass. Fire, smoke or flammable gas shall not be

produced. The OLED panel shall have no loosened parts which could impair safety.
9 Insulation resistance and electric strength
9.1 Insulation resistance
The requirements of IEC 62868-1:2020, 9.1 apply.
9.2 Electric strength
The requirements of IEC 62868-1:2020, 9.2 apply.
10 Thermal stress
The requirements of IEC 62868-1:2020, Clause 10 apply.
11 Creepage distances and clearances
The requirements of IEC 62868-1:2020, Clause 11 apply.
---------------------- Page: 13 ----------------------
– 12 – IEC 62868-2-3:2021 © IEC 2021
12 Resistance to heat and fire
12.1 Resistance to heat
The requirements of IEC 62868-1:2020, 12.1 apply.
12.2 Resistance to fire
The requirements of IEC 62868-1:2020, 12.2 apply.
13 Photobiological safety

OLED products are not expected to reach a level of UV, infrared or blue light hazard that

requires marking or measurement.
14 Terminals
The requirements of IEC 62868-1:2020, Clause 14 apply.
15 Information for luminaire design
The information for luminaire design of IEC 62868-1:2020, Annex B apply.
---------------------- Page: 14 ----------------------
IEC 62868-2-3:2021 © IEC 2021 – 13 –
Annex A
(informative)
Construction of flexible OLED tiles and panels

Figure A.1 and Figure A.2 provide schematic diagrams of glass-based flexible OLED tiles and

panels.
NOTE The diagram on the left represents the front view while that o
...

Questions, Comments and Discussion

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