2.5 1S0 INTERNATIONAL STANDARD 139 Second edilion 2005.0115 Textiles - Standard atmospheres for conditioning and testing Textiles -- Atmospheres normales de conditionnement et d'essai Reference number ISO139:2005(f.) OS1 @iS0 ?005 1S0139:2005(E) Contents Pago Scope Termsanddefinitions Requirements 3 4 Apparatus 5 Procedures 6 Test report AnnexA (normative)Controlof standard atmosph Annex B (informative)Tolerance zone Bibliography @ rso 2005.- All rights reserved 1S0 139:2005(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (1SO 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 eslablished has the right to be represented on that committee. International organizations, governmentail and ElectrotechnicalCommission(tEC)onallmattersofelectrotechnicalstandardization. The main task of technical committees is to prepare International Standards. Draft International Standards adoptedbythetechnical committeesarecircutatedto thememberbodies forvoting.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 139 was prepared by Technical Committee 1sO/TC 38, Textiles, Subcommittee SC 24, Conditioning atmospheres and physical tests for textile fabrics. This second edition cancels and replaces the first edition (IsO 139:1973), which has been technically rcvised specifically by including the allowances for the uncertainty of the measurement in the overall tolerances for temperature and relative humidity. @ IS0 2005 AR rights rcscrvcd 1S0 139:2005(E) Introduction The tolerances for temperature and relative humidity given in 1S0 139:1973 were the tolerances for thc temperature and relative humidity measured in the laboratory, and without any consideration for the unccrtainty of measurement of the measuring devices being used. With the increased understanding since 1973 and the existence now of standards covering these issucs (c.g. Iso 14253-1), it is now necessary to allow for the uncertainty of measurement when setting appropriale tolerances. This second edition of iso 139 includes the allowance for uncertainty of measurement in the overall tolcranccs for temperature and relative humidity. Iso 139:1973, in practice, the laboratory must still be controlled (measured temperature and humidity) to essentially the same level as stated in 1s0 139:1973. @ ISO 2005 --All rights reserved ISO 139:2005(E) INTERNATIONAL STANDARD Textiles - Standard atmospheres for conditioning and testing Scope 1 This International Standard defines the characteristics and use of a standard atmosphere for conditioning. for determining the physical and mechanical properties of textiles and a standard alternative atmosphere thal rnay be used if agreed between parties. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 standard atmosphere environment of controlled relative humidity and temperature in which textiles are conditioned and tested 2.2 relative humidity ratio, expressed as a percentage, of the actual pressure of the water vapour in the atmosphere to the saturation vapour pressure at the same temperature and at the same pressure 2.3 tolerance difference between the upper and lower tolerance limits 。[ISO 3534-2] 2.4 tolerance zone variate values of the characteristics between and including the tolerance limits [ISO3534-2] 2.5 tolerance imits specified values of the characteristic giving upper and/or lower bounds of the permissible value [ISO3534-2] 2.6 uncertainty of measurerment parameter, associated with the result of measurement, that