ISO 16750-5:2023

Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 5: Chemical loads

This document applies to electric and electronic systems and components for vehicles including electric propulsion systems and components with maximum working voltages according to voltage class B. It describes the potential environmental stresses and specifies tests and requirements recommended for the specific mounting location on/in the vehicle. This document describes chemical loads. This document is not intended to apply to environmental requirements or testing for systems and components of motorcycles and mopeds. NOTE Conditions and testing for a continuous contact with chemical agents can be determined from other standards or upon agreement between the customer and the supplier. Systems and their components released for production, or systems and their components already under development prior to the publication date of this document, can be exempted from fulfilling the changes in this edition compared to the previous one.

Véhicules routiers — Spécifications d'environnement et essais de l'équipement électrique et électronique — Partie 5: Contraintes chimiques

General Information

• Status: Published
• Publication Date: 12-Jul-2023
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 2 - Environmental conditions
• Current Stage: 6060 - International Standard published
• Start Date: 13-Jul-2023
• Due Date: 25-May-2023
• Completion Date: 13-Jul-2023

Relations

• Revises: ISO 16750-5:2010 - Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 5: Chemical loads
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16750-5
Third edition
2023-07
Road vehicles — Environmental
conditions and testing for electrical
and electronic equipment —
Part 5:
Chemical loads
Véhicules routiers — Spécifications d'environnement et essais de
l'équipement électrique et électronique —
Partie 5: Contraintes chimiques
Reference number
ISO 16750-5:2023(E)
© ISO 2023

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ISO 16750-5:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
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ISO 16750-5:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Tests . 2
4.1 General . 2
4.2 Purpose . 2
4.3 General test conditions . 2
4.4 DUT conditioning . 2
4.5 Test agent conditioning . 3
4.6 Application method . 3
4.7 Test conditions . 3
4.8 Procedure . 5
4.9 Requirements . 6
5 Documentation . 6
Bibliography . 9
iii
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ISO 16750-5:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This third edition cancels and replaces the second edition (ISO 16750-5:2010), which has been
technically revised.
The main changes are as follows:
— integrating and harmonizing contents from ISO 19453-5:2018 (e.g. change of Table 2);
— reorganization of test conditions and application methods in context (4.6, 4.7);
— addition of application method (4.6, Table 1);
— reconsideration of chemical agents (Clause 5, Table 3).
A list of all parts in the ISO 16750 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
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INTERNATIONAL STANDARD ISO 16750-5:2023(E)
Road vehicles — Environmental conditions and testing for
electrical and electronic equipment —
Part 5:
Chemical loads
1 Scope
This document applies to electric and electronic systems and components for vehicles including electric
propulsion systems and components with maximum working voltages according to voltage class B. It
describes the potential environmental stresses and specifies tests and requirements recommended for
the specific mounting location on/in the vehicle.
This document describes chemical loads.
This document is not intended to apply to environmental requirements or testing for systems and
components of motorcycles and mopeds.
NOTE Conditions and testing for a continuous contact with chemical agents can be determined from other
standards or upon agreement between the customer and the supplier.
Systems and their components released for production, or systems and their components already under
development prior to the publication date of this document, can be exempted from fulfilling the changes
in this edition compared to the previous one.
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.
ISO 16750-1, Road vehicles — Environmental conditions and testing for electrical and electronic equipment
— Part 1: General
ISO 16750-4, Road vehicles — Environmental conditions and testing for electrical and electronic equipment
— Part 4: Climatic loads
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16750-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1
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ISO 16750-5:2023(E)
4 Tests
4.1 General
Components and associated parts that can come into contact with the specified chemical agents shall
be resistant to those agents. The components and associated parts shall be tested with all agents they
are likely to come into contact with, except for those materials which can be shown by documentary
evidence to be immune to the contaminant.
A material is considered to be immune to a contaminant if there is no change in properties sufficient to
affect material performances over the time and at the temperature specified in this clause.
The documentary evidence of immunity shall be provided for any operating conditions that could be
relevant for the DUT, also including the effects of operating temperature and self-heating if deemed
necessary as agreed between the customer and the supplier.
The customer and the supplier shall agree on the type of chemical agents and the manufacturer.
Resistance to the specified chemical agents shall be considered as early as possible during the material
selection process.
4.2 Purpose
The purpose of the test is to determine whether systems/components are unacceptably affected by
temporary exposure to contaminating agents.
NOTE This test is not intended to be a life test.
4.3 General test conditions
Chemical agents shall be selected as defined in Table 2, depending on the mounting location of the DUT.
Unless otherwise specified, one DUT per test agent shall be used.
The following tests describe one test cycle. Unless otherwise specified, one test cycle with one agent
per DUT shall be performed. Any other number of cycles may be agreed between the customer and the
supplier.
During test cycle, the DUT shall be in operating mode 1.2 as defined in ISO 16750-1. Operating mode
1.1 as defined in ISO 16750-1 with protection seals (e.g. sealed mating connector) can be used if agreed
between the customer and the supplier.
NOTE 1 Operating mode with electrical operation can be used if agreed between the customer and the
supplier, and if judged feasible from test setup perspective.
NOTE 2 If the size of the DUT is sufficient, multiple test agents can be applied partially on one DUT provided
that these do not have any influence on each other.
NOTE 3 When only some part of the DUT (e.g. front panel part of audio) is exposed to chemicals, this test can
be performed with the applicable part by agreement between the customer and the supplier. In this case, it is also
relevant to consider sealings, barriers, or other parts of the system that is preventing the exposure of chemical
agents to the hidden parts of the DUT.
4.4 DUT conditioning
Unless otherwise specified, the DUT shall be stored at a room temperature (RT) of (23 ± 5) °C and a
relative humidity (RH) of between 25 % and 75 % until thermal equilibrium is reached.
The DUT shall be tested under conditions of normal use. If necessary, and unless otherwise specified,
unrepresentative coatings or contaminations of the DUT shall be removed.
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ISO 16750-5:2023(E)
If a cleaning procedure is needed, the customer and the supplier shall agree on the methodology.
4.5 Test agent conditioning
All test agents shall be stabilised at an RT of (23 ± 5) °C when applied on the DUT.
4.6 Application method
The application method shall be such that the DUT is sufficiently wetted
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 16750-5
ISO/TC 22/SC 32 Secretariat: JISC
Voting begins on: Voting terminates on:
2022-06-06 2022-08-29
Road vehicles — Environmental conditions and testing for
electrical and electronic equipment —
Part 5:
Chemical loads
Véhicules routiers — Spécifications d'environnement et essais de l'équipement électrique et électronique —
Partie 5: Contraintes chimiques
ICS: 43.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
This document is circulated as received from the committee secretariat.
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 16750-5:2022(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 2022

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ISO/DIS 16750-5:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

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ISO/DIS 16750-5:2022(E)

10


11 Contents

12 Foreword . ⅲ

13 1 Scope . 1

14 2 Normative references . 1
15 3 Terms and definitions . . 1
16 4 Tests . 1

17 4.1 General . 1


18 4.2 Purpose . 2

19 4.3 General test conditions. 2
20 4.4 DUT conditioning . 2
21 4.5 Test agent conditioning. 2
22 4.6 Application method . 3
23 4.7 Test conditions . 3
24 4.8 Procedure . 5
25 4.9 Requirements . 5
26 5 Documentation . 5
27 Bibliography . 8
28
29
30
31
32
33
34
35
36
ii © ISO 2018 – All rights reserved
© ISO 2022 – All rights reserved

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ISO/DIS 16750-5:2022(E)
ISO 16750-5:20XX(E)

37 Foreword

38 ISO (the International Organization for Standardization) is a worldwide federation of national standards
39 bodies (ISO member bodies). The work of preparing International Standards is normally carried out
40 through ISO technical committees. Each member body interested in a subject for which a technical
41 committee has been established has the right to be represented on that committee. International

42 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
43 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
44 electrotechnical standardization.

45 The procedures used to develop this document and those intended for its further maintenance are
46 described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

47 different types of ISO documents should be noted. This document was drafted in accordance with the
48 editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
49 Attention is drawn to the possibility that some o f the elements of this document may be the subject of
50 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
51 patent rights identified during the development of the document will be in the Introduction and/or on
52 the ISO list of patent declarations received (see www.iso.org/patents).


53 Any trade name used in this document is information given for the convenience of users and does not
54 constitute an endorsement.
55 For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
56 expressions related to conformity assessment, as well as information about ISO's adherence to the World
57 Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
58 www.iso.org/iso/foreword.html
59 This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
60 Electrical and electronic components and general system aspects.
61 This third edition cancels and replaces the second edition (ISO 16750-5:2010), which has been
62 technically revised.
63 The main change compared to the previous edition is that the contents of ISO 19453-5 defining the
64 environmental conditions and testing for electrical and electronic equipment for drive system of electric
65 propulsion vehicles “Chemical loads” were merged.
66 A list of all parts in the ISO 16750 series can be found on the ISO website.
67 Any feedback or questions on this document should be directed to the user’s national standards body. A
68 complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2018 – All rights reserved iii
© ISO 2022 – All rights reserved

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ISO/DIS 16750-5:2022(E)











© ISO 2022 – All rights reserved

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ISO/DIS 16750-5:2022(E)
INTERNATIONAL STANDARD ISO 16750-5:201X(E)



69 Road vehicles — Environmental conditions and testing for
70 electrical and electronic equipment — Part 5: Chemical loads


71 1 Scope
72 This document applies to electric and electronic systems and components for vehicles including electric

73 propulsion systems and components with maximum working voltages according to voltage class B. It
74 describes the potential environmental stresses and specifies tests and requirements recommended for
75 the specific mounting location on/in the vehicle.

76 This document describes chemical loads.
77 This document is not intended to apply to environmental requirements or testing for systems and
78 components of motorcycles and mopeds. Electromagnetic compatibility (EMC) is not covered by this

79 document.

80 NOTE Conditions and testing for a continuous contact with chemical agents can be determined from other
81 standards or agreed upon between the customer and the supplier.
82 2 Normative references
83 The following documents are referred to in the text in such a way that some or all of their content
84 constitutes requirements of this document. For dated references, only the edition cited applies. For
85 undated references, the latest edition of the referenced document (including any amendments) applies.
86 ISO 16750-1, Road vehicles — Environmental conditions and testing for electrical and electronic equipment
87 — Part 1: General
88 ISO 16750-4, Road vehicles — Environmental conditions and testing for electrical and electronic equipment
89 — Part 4: Climatic loads
90 3 Terms and definitions
91 For the purposes of this document, the terms and definitions given in ISO 16750-1 apply.
92 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
93 — IEC Electropedia: available at http://www.electropedia.org/
94 — ISO Online browsing platform: available at https://www.iso.org/obp
95 4 Tests
96 4.1 General
97 Components and associated parts that can come into contact with the specified chemical agents shall be
98 resistant to those agents. The components and associated parts shall be tested with all agents they are
99 likely to come into contact with, except for those materials which can be shown by documentary evidence
100 to be immune to the contaminant.
© ISO 20XX – All rights reserved
1
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ISO/DIS 16750-5:2022(E)

ISO 16750-5:20XX(E)


101 A material is considered to be immune to a contaminant if there is no change in properties sufficient to

102 affect material performances over the time and at the temperature specified in this clause.

103 The documentary evidence of immunity shall take into account effects of operating temperature and self-

104 heating if deemed necessary by agreement between the customer and the supplier.

105 The customer and the supplier shall agree on type of chemical agents and the manufacturer.

106 Resistance to the specified chemical agents shall be considered as early as possible during the material
107 selection process.

108 4.2 Purpose

109 The purpose of the test is to determine whether systems/components is unacceptably affected by
110 temporary exposure to contaminating agents.
111 NOTE This test is not intended to be a life test.
112 4.3 General test conditions
113 Chemical agents shall be selected as defined in Table 1, depending on the mounting location of the device
114 under test (DUT).
115 Unless otherwise specified, one DUT per test agent shall be used.
116 The following tests describe one test cycle. Unless otherwise specified, one test cycle with one agent per
117 DUT shall be performed. Any other number of cycles may be agreed between the customer and the
118 supplier.
119 During test cycle, the DUT shall be operating mode 1.2 as defined in ISO 16750-1.
120 NOTE1 Operating mode 1.1 with protection seals (e.g. sealed mating connector) can be applicable.
121 NOTE2 Operating mode with electrical operation can be used if agreed between the customer and the supplier,
122 and if
...