INTERNATIONAL STANDARD ISO 11093-2:1994(E) Paper and board --- Testing of cores Part 2: Conditioning of test samples Scope 4 Conditioning atmosphere This.part of ISO11093,based onISo 187,specifies See table 1. the.conditioning atmospheres to used for Table 1 -- Conditioning atmosphere conditioningandtesting cores. Ralative Designation Temparature humidity Remark % Normative reference 23/50 23 ± 1 50 ± 2 Preferred The following standard contains provisions which, atmosphere through reference in this text, constitute provisions of 27/65 27 ± 1 65 ± 2 For tropical this part of ISO 11093. At the time of publication, the countries edition indicated was valid.All standards are subject to revision, and parties to agreements based on this part of Iso 11093 are encouraged to investigate the possibility of applying the most recent editions of the Unless otherwise stated in the terms and conditions standards indicated below. Members of IEC and ISO of delivery or test standard or agreed between the maintain registers of currently valid International interested parties, the 23/50 conditioning atmosphere Standards. shall be used. Iso 187:1990,Paper,board and puips- S NOTE 2 The specification for the temperature and relative Standard atmosphere for conditioning and testing and pro- humidity,and their admissible tolerance values, conform to those laid down in iSO 554:1976, Standard atmospheres cedure for monitoring the atmosphere and condition- forconditioningand/ortesting Specifications. ingofsamples. 3Definition 5 Apparatus For the purposes of this part of tso 11093, the 5.1 Climatic chamber and measuring following definition applies. instrumentation The climatic chamber in which.conditioning is carried 3.1 conditioning: Establishing a moisture equilib- out shall be. provided with an automatic facility capable of bringing the air to standard conditions of rium between the test piece and a conditioning temperatureandreiative.humidity.aswell asof atmosphere of a specified temperature and relative circulatingthe air.in such amanner that these humidity. conditions are uniformly maintained at all relevant points within the climatic chamber. NOTE1 The moisture equilibrium isrequired to establish a Stable physical state of the cores. Under certain circum- stances, conditioning may have to be prolonged until the The atmospheric conditions in the chamber shall be desired physical state has been attained.Such circum verified in accordance with the specifications given in stances, however, are not within the scope of this method. iSO187:1990AnnexA 851B5*150*11093-2.941624669046380171 SO11093-2:1994(E) 6Procedure 6 Conditioningreport The conditioning report shall include the following 6.1 Pre-drying of the test pieces particulars: To speed up the adjustment of. the moisture a) reference to this part of iSO 11093; equilibrium between test pieces and the conditioning atmosphere, predry the test pieces, for a period of b) type and designation of the specimen or test 48 h, in air of a relative humidity between 20 % and pieces; 35%and ata temperatureof 40°C±2°℃. c) place and date of.conditioning; 6.2 Conditioning d) number of specimen or test pieces; Position the test pieces so that the air has free access e) conditioning atmosphere used and the duration; to all surfaces until the moisture equilibrium has been attained. The moisture equilibrium shall be considered f) deviation, if any, from the method specified. to be attained if the results of two consecutive weighings, carried out at a minimum interval of 48 h, do not differ from one another by more than o,1 % of the mass. 2 S011093-2:1994(E) ICS85.080.00 Descriptors: paper, paperboards. cores, spool cores, tests, test specimens; conditioning.