ISO 16750-4.pdf

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INTERNATIONAL STANDARD ISO 16750-4 First edition 2003-12-15 Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 4: Climatic loads Véhicules routiers — Spécifications d'environnement et essais de l'équipement électrique et électronique — Partie 4: Contraintes climatiques Reference number ISO 16750-4:2003(E) © ISO 2003 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. © ISO 2003 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 ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii © ISO 2003 — All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(E) Contents Page Foreword............................................................................................................................................................ iv Scope...................................................................................................................................................... 1 1 Normative references ........................................................................................................................... 1 2 3 Terms and definitions........................................................................................................................... 2 Operating temperature ranges ............................................................................................................ 2 4 Tests and requirements........................................................................................................................ 3 5 5.1 Tests at constant temperature............................................................................................................. 3 5.2 Temperature steps ................................................................................................................................ 4 Temperature cycling ............................................................................................................................. 5 5.3 5.4 Ice water shock test .............................................................................................................................. 8 5.5 Salt spray ............................................................................................................................................. 11 5.6 Humid heat, cyclic............................................................................................................................... 13 Damp heat, steady-state..................................................................................................................... 13 5.7 5.8 Corrosion test with flow of mixed gas .............................................................................................. 14 Solar radiation ..................................................................................................................................... 14 5.9 6 Codes for climatic loads..................................................................................................................... 14 Protection against dust and water .................................................................................................... 15 7 8 Documentation .................................................................................................................................... 15 Annex A (informative) Usual tests and requirements for equipment (depending on mounting location) ............................................................................................................................................... 16 © ISO 2003 — All rights reserved iii Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 16750-4 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. ISO 16750 consists of the following parts, under the general title Road vehicles — Environmental conditions and testing for electrical and electronic equipment:  Part 1: General  Part 2: Electrical loads  Part 3: Mechanical loads  Part 4: Climatic loads  Part 5: Chemical loads iv © ISO 2003 — All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

INTERNATIONAL STANDARD ISO 16750-4:2003(E) Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 4: Climatic loads 1 Scope This part of ISO 16750 describes the climatic loads that can affect of electric and electronic systems and components in respect of their mounting location directly on or in road vehicles and specifies the corresponding tests and requirements. 2 Normative references The following referenced documents are indispensable for the application 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 12103-1, Road vehicles — Test dust for filter evaluation — Part 1: Arizona test dust ISO 16750-1:2003, Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 1: General ISO 16750-2:2003, Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 2: Electrical loads IEC 60068-2-1, Environmental testing — Part 2: Tests — Tests A: Cold IEC 60068-2-2, Environmental testing — Part 2: Tests — Tests B: Dry heat IEC 60068-2-11, Environmental testing — Part 2: Tests — Test Ka: Salt mist IEC 60068-2-14, Environmental testing — Part 2: Tests — Test N: Change of temperature IEC 60068-2-30, Environmental testing — Part 2: Tests — Test Db and guidance: Damp heat, cyclic (12 + 12- hour cycle) IEC 60068-2-38, Environmental testing — Part 2: Tests — Test Z/AD: Composite temperature/humidity cyclic test IEC 60068-2-52, Environmental testing — Part 2: Tests — Test Kb: Salt mist, cyclic (sodium, chloride solution) IEC 60068-2-60, Environmental testing — Part 2: Tests — Test Ke: Flowing mixed gas corrosion test IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state © ISO 2003 — All rights reserved 1 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(E) DIN 40050-9, Road vehicles; degrees of protection (IP-code); protection against foreign objects; water and contact; electrical equipment 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 16750-1 apply. 4 Operating temperature ranges The applicable temperature ranges shall be chosen from Table 1 and given in the specification of the device under test (DUT). Table 1 — Operating temperature ranges Code A B C D E F G H I J K L M N O P Z Tmax Tmin °C °C 65 −20 65 −30 65 −40 70 −40 80 −40 85 −40 90 −40 100 −40 110 −40 120 −40 125 −40 130 −40 140 −40 150 −40 155 −40 160 −40 As agreed upon In case of hot-soak requirements (Tmax,HS), add 15 °C to Tmax. For details see 5.3.2. The paint repair temperature (Tmax,PR) can be higher than the operating temperature and shall be given in the specification of the DUT. 2 © ISO 2003 — All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(E) 5 Tests and requirements 5.1 Tests at constant temperature 5.1.1 Low-temperature tests 5.1.1.1 Storage 5.1.1.1.1 Purpose This test simulates the exposure of a system/component to low temperatures without electrical operation, for example during shipment. Failure mode is insufficient frost resistance (e.g. freezing of liquid crystal displays). 5.1.1.1.2 Test Perform the test according to IEC 60068-2-1, cold, at a temperature of −40 °C for a duration of 24 h, unless otherwise specified in the DUT specification. Use Operating mode 1.1 in accordance with ISO 16750-1:2003, Clause 5. 5.1.1.1.3 Requirement The functional status shall be Class C as defined in ISO 16750-1:2003, Clause 6. 5.1.1.2 Operation 5.1.1.2.1 Purpose This test simulates the exposure of a system/component to low temperatures with electrical operation, for example use at very low ambient temperature. Failure mode is electrical malfunction caused by low temperature (e.g. freezing of capacitors with liquid electrolyte). 5.1.1.2.2 Test Perform the test according to IEC 60068-2-1 at a temperature of Tmin for a duration of 24 h. Use Operating mode 3.2 in accordance with ISO 16750-1:2003, Clause 5. 5.1.1.2.3 Requirement The functional status shall be Class A as defined in ISO 16750-1:2003, Clause 6. 5.1.2 High-temperature tests 5.1.2.1 Storage 5.1.2.1.1 Purpose This test simulates the exposure of a system/component to high temperatures without electrical operation, for example during shipment. Failure mode is insufficient heat resistance (e.g. warping of plastic housings). 5.1.2.1.2 Test Perform the test according to IEC 60068-2-2 at a temperature of +85 °C for a duration of 48 h, unless otherwise specified in the DUT's specification. Use Operating mode 1.1 in accordance with ISO 16750-1:2003, Clause 5. © ISO 2003 — All rights reserved 3 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

ISO 16750-4:2003(E) 5.1.2.1.3 Requirement The functional status shall be Class C as defined in ISO 16750-1:2003, Clause 6. 5.1.2.2 Operation 5.1.2.2.1 Purpose This test simulates the exposure of the system/component to high temperatures with electrical operation, for example, use at very high ambient temperature. Failure mode is electrical malfunction caused by high temperature (e.g. thermal degradation of components). 5.1.2.2.2 Test Perform the test according to IEC 60068-2-2 at a temperature of Tmax for a duration of 96 h. Use Operating mode 3.2 in accordance with ISO 16750-1:2003, Clause 5. 5.1.2.2.3 Requirement The functional status shall be Class A as defined in ISO 16750-1:2003, Clause 6. 5.2 Temperature steps 5.2.1 Purpose This test is for checking the mechanical and electrical device for malfunctions which may occur within a small section of the operating temperature range. Key T t temperature, °C time, min Figure 1 — Temperature step test — Example (illustrates code “M” according to Table 1) 5.2.2 Test Install the DUT in a temperature chamber, decrease the temperature in steps of 5 °C from 20 °C to Tmin and then increase the temperature in steps of 5 °C from Tmin to Tmax (see Table 1 and Figure 1). Wait at each step until the DUT has reached the new temperature. Perform functional tests using operating mode 3.2 in accordance with ISO 16750-1:2003, Clause 5, at Umin and Umax, using the appropriate code in accordance with ISO 16750-2:2003, Table 1, at each new temperature. Switch the DUT off during transition to the next temperature. 4 © ISO 2003 — All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--```,``-`-`,,`,,`,`,,`---

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