ISO INTERNATIONAL STANDARD 6270-2 Second edition 2017-11 Paints and varnishes Determination of resistance to humidity - Part 2: Condensation (in-cabinet exposure with heated water reservoir) Peintures et vernis - Détermination de la résistance a I'humidité - Partie 2: Condensation (exposition en enceinte avec réservoir a eau chauffée) Reference number ISO 6270-2:2017(E) osi @ IS0 2017 IS0 6270-2:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Designation ..1 5 Limitations. ..2 6 Principle ..2 7 Test atmospheres .2 8 Apparatus. ..3 9 Procedure .4 9.1 Filling the floor trough .4 9.2 Test specimens .5 9.3 Arrangement of the test specimens .5 9.4 Determination of the comparison quantity of condensation water 5 9.5 Test sequence. 5 9.5.1 Start-up, .5 9.5.2 Condensation atmosphere with constant humidity (CH) .6 9.5.3 Condensation atmosphere with alternation of humidity and air temperature (AHT) .6 9.5.4 Condensation atmosphere with alternation of air temperature (AT) ..6 9.6 Interruptions .6 9.7 Endoftest .6 10 Evaluation .6 11 Precision 12 Test report ..7 Bibliography 8 @ IS0 2017 - All rights reserved ii IS0 6270-2:2017(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 constituteanendorsement. For an explanation on 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 the following URL: www.iso.org/iso/foreword.html. This document was prepared by Technical Committee Iso/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (IS0 6270-2:2005), which has been technically revised. The main changes compared to the previous edition are as follows: - a principle clause has been added; the terms and definitions clause has been added; a limitations clause concerning the use of other than standard test conditions has been added; the recommendation to use distilled or deionized water for filling the trough has been changed; a requirement has been added to make sure that condensation forms on all test specimens; a method for the determination of the comparison quantity of condensation water has been added; -information on precision has been added; the normative references have been updated. A list of all parts in the ISO 6270 series can be foun