DIN EN 1161-1996 Feather and down - Test methods - Determination of moisture content German version EN 1161 1996《羽毛和羽绒 试验方法 含湿量测定》.pdf

1、O No pari of this standard may be reproduced without the prior permission of DIN Deutsches Institut fr Normung e.V., Berlin. Beuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen) Ref. No. DIN EN 1161: 1996-70 Price group 05 Sales No. 1105 05.97 EUROPEAN STAN DA

2、R D NORME EUROPENNE EUROPISCHE NORM EN 1161 August 1996 ICs 67.120.20; 97.160 Descriptors: Feather, down, moisture content, testing. English version Feather and down Test methods Determination of moisture content Plumes et duvets - Mthodes dessai - Mesure de la teneur en humidit Federn und Daunen -

3、Prfverfahren - Bestimmung des Feuchtegehaltes This European Standard was approved by CEN on 1996-05-09. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

4、Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation u

5、nder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nethe

6、rlands, Norway, Por- tugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-IO50 Brussels O 1996. GEN - All rights of exploitation in any form and b

7、y any means reserved worldwide for CEN national members. Ref. No.EN1161:1996E Page 2 EN 1161:1996 Foreword This European Standard has been prepared by the Technical Committee CENTTC 222 “Feather and down as filling material for any article, as well as finished articles filled with feather and down“,

8、 the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 1997, and conflicting national standards shall be withdrawn at the latest by February 1997. Accor

9、ding to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,

10、Switzerland and the United Kingdom. Page 3 EN 11 61 : 1996 1 Scope This individual sample of feather and down. European Standard specifies a procedure to determine the moisture content of an 2 Definitions For the purposes of this standard the following definition applies: moisture content: The ratio

11、 between the loss of mass of a test specimen by drying at (105 i 2) “C and the initial mass of the same test specimen. 3 Principle The moisture content is determined by drying the test specimen at (1 05 i 2) C until a constant mass is obtained. The test specimen is weighed before and after this oper

12、ation. 4 Apparatus 4.1 An analytical balance (with sensitivity of 0,l mg) 4.2 Weighing containers, water-vapour proof and with tightly fitting lids 4.3 Oven, capable of being controlled at (105 k 2)C, and suitably ventilated 4.4 Tongs 4.5 A desiccator with desiccating agent 5 Preparation of the test

13、 specimen A representative part of the laboratory bulk sample shall be drawn and mixed. From this, two test specimens of about 5 g weighed with an accuracy of 1 mg each shall be drawn, taking care to avoid humidity variation, and placed into containers (4.2). 6 Procedure 6.1 The uncovered container

14、and the lid shall be placed for 2 h I 10 min in the oven at a temperature of (1 05 f 2) C. The container shall then be covered, and using clean tongs quickly transferred to the desiccator. After cooling to room temperature for not less than 1 h the covered container shall be weighed. This procedure

15、shall be repeated until a constant mass, within 1 mg, is obtained. 6.2 A representative test specimen of about 5 g weighed with an accuracy of 1 mg shall then be transferred as quick as possible to the predried container taking care to avoid humidity variations. The container shall be covered with a

16、 lid and weighed with an accuracy of 1 mg. Page 4 EN 1161 :1996 6.3 The containers and the lids shall be placed separately in the oven and dried at (105 * 2) OC. After drying for 1 h k 10 min the container and the lid shall be transferred using clean tongs to the desiccator, and allowed to cool for

17、not less than 1 h. After cooling to room temperature, the containers with the lids shall be transferred using clean tongs to the analytical balance and weighed. The heating, cooling and weighing cycle shall be repeated until the mass of the container with a dried lid is constant to within 1 mg. 6.4

18、Repeat the procedure on a second test specimen. 7 Expression of results The moisture content, M, as a percentage, is calculated as follows: A-B A-C IMC = - .loo where A B C is the mass of the container with lid and undried individual sample; is the mass of the container with lid and dried individual

19、 sample; is the mass of the container with dried lid. All masses shall be expressed in grams, to three decimal places. Calculate the mean for the two determinations, with the approximation to the nearest integer. 8 Test report The test report shall include at least the following information: - the reference to this standard; - date and place of testing; - identification mark of the individual sample tested; - the arithmetic mean result to the nearest integer in accordance with clause 7; - any departure from the procedure and any other circumstances that can have affected the result.