LEC IEC 60068-2-30 Edition 4.02025-08 INTERNATIONAL STANDARD Environmentaltesting Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) IEC 60068-2-30:2025-08(en) ICS 19.040 ISBN978-2-8327-0616-9 THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright @ 2025 IEC, Geneva, Switzerland orhave an enquiry about obtaining additional rights to this publication,pleasecontactthe addressbelow oryour local IECmemberNationalCommitteeforfurtherinformation. IECSecretariat Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] 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 forall electrical, electronic and related technologies. AboutIECpublications The technical content of IEC publications is kept under constant reviewby the IEC.Please make sure that you have the latest edition,a corrigendumoranamendmentmighthavebeenpublished. IEcpublicationssearch IECProducts&ServicesPortal-products.iec.ch webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the The advanced search enables to find IEC publications by a publications previews, graphical symbols and the giossary. variety of criteria (reference number, text, technical With a subscription you will always have access to up to date committee,...).It also gives information on projects, content tailored to your needs. replaced and withdrawnpublications. Electropedia - www.electropedia.org IECJustPublished-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 22 500 terminoiogical entries in English details all new publications released. Available online and and French, with equivalent terms in 25 additional languages. onceamonthby email. Alsoknownas 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: [email protected]. Warning! Make sure that you obtained this publication from an authorized distributor. IEC60068-2-30:2025@IEC2025 CONTENTS FOREWORD 3 1 Scope... 2 Normative references 3 Terms and definitions 5 4 General description 5 Description of test chamber 6 Severities 7 Testing procedure. 7.1 General... 7.2 Initial measurements .. 7.3 Preconditioning. 7.4 Test cycle ... 7.5 Intermediate measurements .... .14 8 Recovery... 14 9 Final measurements . 10 Information to be given in the relevant specification.... 11 Information to be given in the test report. .16 Annex A (informative) Selection of variant for the cooling period - Guidance.. ..18 Annex B (normative) Supporting documentation for temperature and humidity limits in the test sequences.. .19 B.1 General.. ...19 B.2 Preconditioning .. .19 B.3 Variant 1 .20 B.4 Variant 2 ..20 B.5 Recovery ..21 Annex C (informative) Supporting documentation for programming the set value.. ..22 C.1 General. ..22 C.2 Preconditioning .22 C.3 Variant 1 .22 C.4 Variant 2. C.5 Recovery . Bibliography .24 Figure 1 - Test Db - Preconditioning period . .8 Figure 2 - Test Db - Test cycle - Variant 1, Method I.. ..10 Figure 3 - Test Db - Test cycle - Variant 1, Method IIl. Figure 4 - Test Db - Test cycle - Variant 2, Method Ill.. .12 Figure 5 - Test Db - Test cycle - Variant 2, Method IV. ..13 Figure 6 - Test Db - Recovery at controlled conditions.. ..15 Table 1 - Severities of Test Db .. ·6 Table B.1 - Limits of relative humidity during preconditioning ..19 Table B.2 - Temperature limits during preconditioning ... Table B.3 - Limits of relative humidity and temperature during Variant 1 ..20 1 IEC60068-2-30:2025@IEC2025 Table B.4 - Limits of relative humidity and temperature during Variant 2. ..20 Table B.5 - Limits of relative humidity during recovery Table B.6 - Temperature limits during recovery..