ISO 17449:2015
(Main)Road vehicles — Safety glazing materials — Test methods for properties of electrically heated glazing
Road vehicles — Safety glazing materials — Test methods for properties of electrically heated glazing
ISO 17449:2015 This provides the test methods and acceptance criteria for circuit continuity and heating power, driving visibility, electrical attachment bond performance, electrical attachment bending performance, hot spot identification and heating uniformity, defrosting efficiency, high voltage durability, low temperature performance and long term humidity durability, for all electrically heated safety glazing materials in a road vehicle. This International Standard provides test protocols for the static performance of an electrically heated glazing material; it is not representative of in-vehicle performance.
Véhicules routiers — Vitrages de sécurité — Méthodes d'essai pour les propriétés des vitrages chauffés électriquement
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INTERNATIONAL ISO
STANDARD 17449
First edition
2015-11-15
Road vehicles — Safety glazing
materials — Test methods for
properties of electrically heated
glazing
Véhicules routiers — Vitrages de sécurité — Méthodes d’essai pour les
propriétés des vitrages chauffés électriquement
Reference number
ISO 17449:2015(E)
©
ISO 2015
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ISO 17449:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
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ii © ISO 2015 – All rights reserved
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ISO 17449:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specimens . 3
5 Conditioning of test specimens . 3
6 Application of test . 3
7 Requirements . 4
7.1 Circuit continuity and heating power . 4
7.1.1 Purpose of test . 4
7.1.2 Apparatus . 4
7.1.3 Procedure . 4
7.1.4 Expression of results . 4
7.2 Driving visibility . 5
7.2.1 Purpose of test . 5
7.2.2 Apparatus . 5
7.2.3 Procedure . 5
7.2.4 Expression of results . 5
7.3 Electrical attachment bond performance . 5
7.3.1 Purpose of test . 5
7.3.2 Apparatus . 5
7.3.3 Procedure . 6
7.3.4 Expression of results . 6
7.4 Electrical attachment bending performance . 6
7.4.1 Purpose of test . 6
7.4.2 Procedure . 6
7.4.3 Expression of results . 6
7.5 Hot spot and heating uniformity . 6
7.5.1 Purpose of test . 6
7.5.2 Apparatus . 7
7.5.3 Procedure . 7
7.5.4 Expression of results . 7
7.6 Defrosting efficiency . 7
7.6.1 Purpose of test . 7
7.6.2 Apparatus . 7
7.6.3 Procedure . 8
7.6.4 Expression of results . 8
7.7 High voltage durability . 8
7.7.1 Purpose of test . 8
7.7.2 Procedure . 8
7.7.3 Expression of results . 9
7.8 Low temperature performance . 9
7.8.1 Purpose of test . 9
7.8.2 Apparatus . 9
7.8.3 Procedure . 9
7.8.4 Expression of results . 9
7.9 Long term humidity durability . 9
7.9.1 Purpose of test . 9
7.9.2 Apparatus . 9
7.9.3 Procedure .10
7.9.4 Expression of results .10
8 Acceptance criteria .10
© ISO 2015 – All rights reserved iii
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ISO 17449:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 35, Lighting
and visibility.
iv © ISO 2015 – All rights reserved
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INTERNATIONAL STANDARD ISO 17449:2015(E)
Road vehicles — Safety glazing materials — Test methods
for properties of electrically heated glazing
1 Scope
This International Standard provides the test methods and acceptance criteria for circuit continuity and
heating power, driving visibility, electrical attachment bond performance, electrical attachment bending
performance, hot spot identification and heating uniformity, defrosting efficiency, high voltage durability,
low temperature performance and long term humidity durability, for all electrically heated safety glazing
materials in a road vehicle. This International Standard provides test protocols for the static performance
of an electrically heated glazing material; it is not representative of in-vehicle performance.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 3538, Road vehicles — Safety glazing materials — Test methods for optical properties
IEC 60051–2, Direct acting indicating analogue electrical measuring instruments and their accessories,
Part 2 — Special requirements for ammeters and voltmeters
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
heating evaluation area
for Type 1 (3.7), represented by an area formed by outermost conductors at an extended distance of
20 mm wider than the bus bars (along the edges) and extended to 50 mm on both the top and bottom, in
the absence of specific requirements and for a glazing equipped with heating circuits formed by evenly
distanced conductive lines and bus bars near to the glass edges
Note 1 to entry: If the extended distance is over the edge of the glass, then take the glass edge as the border
of evaluation area. The size of this generated area is calculated using CAD, see Figure 1. For other specifically
designed heaters with e.g. circular shaped heater, product specification can be referenced for the heating
evaluation area.
for Type 2 (3.8) and Type 3 (3.9), shall be the same as the area of the heating elements themselves, in the
absence of special requirements
Note 2 to entry: No additional area shall be included.
© ISO 2015 – All rights reserved 1
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ISO 17449:2015(E)
1
2
3
4
5
Heating evaluation area
Key
1 glass
2 heating circuits
3 electrical attachment
4 bus bar
5 outmost conductor
Figure 1 — Heating evaluation area of Type 1
3.2
electrical attachment
components used for connecting to the vehicle power supply
3.3
defrosting
elimination of frost from the exterior of the glazing by heating at specified voltage
3.4
melted area
area of the outer glazed surface of the sample having a dry surface or covered with melted frost
Note 1 to entry: Partially melted area is excluded. The melted area shall be determined visually.
3.5
defrosting efficiency
ratio of the melted area to the heating evaluation area after supplying specified voltage for the specified
period of time at specified ambient condition
3.6
hot spot
any area on outer surface of the whole part that exceeds the maximum temperature defined in the
product specification after the part is supplied with specified voltage for the specified heating time
period at the specified ambient condition
3.7
Type 1
heater circuit consisting of conductors applied to the inside surface of a tempered or laminated safety
glass or a plastic safety glazing parts by means of a screen print, ink jet, or other method
2 © ISO 2015 – All rights reserved
20 mm
50 mm
50 mm
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...
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17449
ISO/TC 22/SC 11 Secretariat: ANSI
Voting begins on: Voting terminates on:
2014-08-25 2014-11-25
Road vehicles — Safety glazing materials — Test methods
for properties of electrically heated glazing
Véhicules routiers — Vitrages de sécurité — Méthodes d’essai pour les propriétés des vitrages chauffés
électriquement
ICS: 43.040.65
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17449:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
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ISO/DIS 17449:2014(E)
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
electronic, photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2014 – All rights reserved
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Road vehicles—Safety glazing materials –Test methods for performance of
electrically heated glazing
1. Scope
This International Standard provides the test methods for circuit continuity and heating power, driving
visibility, electrical attachment bond performance, electrical attachment bending performance, hot spot
identification and heating uniformity, defrosting efficiency, high voltage durability, low temperature
performance and long term humidity durability, for all electrically heated safety glazing materials in a
road vehicle. This standard provides test protocols for the static performance of an electrically heated
glazing material, it is not representative of in-vehicle performance.
2. Normative references
The following normative documents contain provisions which, through reference in this text, constitute
provisions of this International Standard. For dated references, subsequent amendments to, or revisions
of, any of these publications do not apply. However, parties to agreements based on this International
Standard are encouraged to investigate the possibility of applying the most recent editions of the
normative documents indicated below. For undated references, the latest edition of the normative
document referred to applies. Members of ISO and IEC maintain registers of currently valid International
Standards.
IEC 51-2 Direct acting indicating analogue electrical measuring instruments and their accessories
Parts 2 - Special requirements for ammeters and voltmeters
ISO 3538 Road vehicles —Safety glazing materials —Test methods for optical properties.
ISO 15082 Road vehicles —Tests for rigid plastic safety glazing materials
ECE R125 Uniform provisions concerning approval of motor vehicle with regards to the forwards
field of vision of the motor vehicle driver
3. Terms and definitions
For the purpose of this International Standard, the following definitions apply.
3.1 Heating evaluation area：
For Type 1 specified in 3.6, in absence of specific requirements and for a glazing equipped with heating
circuits formed by about evenly distanced conductive lines and bus bars near to the glass edges, the
heating evaluation area is represented by an area formed by the inner border of the bus bars and along
the heater lines by imaginary lines running outside and parallel to the outermost conductors at a
distance half of that to the next closest heating conductor. The size of this generated area is calculated
using CAD, see figure 1. For other specifically designed heaters with e.g. circular shaped heater, product
specification can be referenced for the heating evaluation area.
For Type 2 specified in 3.7 and Type 3 specified in 3.8, in absence of specific requirements, the heating
evaluation area refers to vision area specified in ECE R125.
Heating evaluation area
Key
1 Glass
2 Heating circuits
3 Electrical attachment
4 Bus bar
1
a/2 a b b/2
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Fig. 1, Heating evaluation area of Type 1
3.2 Electrical attachment：The components used for connecting to the vehicle power supply.
3.3 Defrosting: Elimination of frost or ice from the exterior of the glazing by heating at specified voltage.
3.4 Defrosting efficiency: A ratio of the melted area to the heating evaluation area after supplying
specified voltage for the specified period of time at specified ambient condition.
3.5 Hot spot: Any area on outer surface of the whole part that exceeds the maximum temperature
defined in the product specification after the part is supplied with specified voltage for the specified
heating time period at the specified ambient condition.
3.6 Type 1:Heater circuit consisting of conductors applied to the inside surface of a tempered or
laminated safety glass or a plastic safety glazing parts by means of a screen print, ink jet or other
method.
3.7 Type 2: Heater circuit consisting of discrete conductor lines applied to the inside of a laminated safety
glazing by incorporation of metal wires or any other suitable method.
3.8 Type 3: Heater circuit utilizing a transparent conductive film applied to one of the inner surfaces of a
laminated safety glazing.
4. Conditioning of test parts
Unless otherwise specified, parts to be tested shall be conditioned prior to testing under the following
conditions and for at least 4 hours:
— Ambient temperature: 23℃ ± 2℃
—Atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar)
— Ambient relative humidity: (50±20)%
5. Specimens
Test specimens shall be production parts.
6. Application of test
For certain types of safety glazing material, it is not necessary to carry out all the tests specified in this
International Standard. Test items for a certain type of electrically heating glazing are suggested in Table
1.
2
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Table 1
Type
No. Test item Paragraph
1 2 3
Circuit continuity and heating
1 7.1 × × ×
power
2 Driving visibility 7.2 × × ×
Electrical attachment bond
3 7.3 × × ×
performance
Electrical attachment Bending
4 7.4 × － －
performance
Hot spot identification and
5 7.5
× × ×
heating uniformity
6 Defrosting efficiency 7.6
× × ×
High voltage durability
7 7.7 × × ×
Low temperature performance
8 7.8 × × ×
Long term humidity durability
9 7.9 － × ×
× Test required.
－ Test needs not be carried out.
7. Requirements
7.1 Circuit continuity and heating power
7.1.1 Purpose of test
The purpose of this test is to determine whether the heating system circuit has the correct continuity
between elements and heating power conforms to the product specification.
7.1.2 Apparatus
a) Variable direct current (DC) power supply, rated at a minimum of 1.5 times the voltage and 1.5 times
the current specified for the parts to be tested.
b) Voltage meter, conforming to IEC 51-2, with an Accuracy Class of 1.
c) Ampere meter, conforming to IEC 51-2, with an Accuracy Class of 1.
d) Heat sensitive paper.
e ) Projector conforms to ISO 3538.
f) Thermal camera, with range 0 to 100°C, accuracy +/-0.5°C, can measure and record the tested area
with a spatial resolution of 2 mm.
7.1.3 Procedure
7.1.3.1 Circuit continuity
For Type 1 parts, supply the voltage defined in product specification to the electrical attachments of the
part. Lay heat sensitive paper across the heating wires. Optionally, use a thermal camera to check the
part after power is supplied.
For Type 2 parts, supply the voltage defined in product specification to the electrical attachments of the
part. Set the part vertically between the projector and a display screen. Light is projected through the
part to the display screen. Wires with light shadow on the screen are broken wires.
For Type 3 parts, supply the voltage defined in product specification to the electrical attachments of the
part, record value of ampere meter.
7.1.3.2 Heating power
In absence of special requirements, heating the part for 30 minutes, and read the electrical current value
shown on the ampere meter.
7.1.4 Expression of results
7.1.4.1 Circuit continuity
3
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For Type 1 parts, check the colour change in the paper or in thermal camera due to heat. Make
record of broken heating wires.
For Type 2 parts, check the shadow of the part on the screen. Make record of broken wire position on the
part.
For Type 3 parts, calculate the resistance according to the voltage measured at the attachments and the
corresponding current as measured in 7.1.3.2, and determine the continuity.
7.1.4.2 Heating power
Calculate the heating power according to the voltage measu
...
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