1、April 2012 Translation by DIN-Sprachendienst.English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 9
2、7.150!$C“1883227www.din.deDDIN EN ISO 24340Resilient floor coverings Determination of thickness of layers (ISO 24340:2006)English translation of DIN EN ISO 24340:2012-04Elastische Bodenbelge Bestimmung der Dicke der Schichten (ISO 24340:2006)Englische bersetzung von DIN EN ISO 24340:2012-04Revtement
3、s de sol rsilients Dtermination de lpaisseur des couches (ISO 24340:2006)Traduction anglaise de DIN EN ISO 24340:2012-04SupersedesDIN EN 429:1993-11www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.903.12 DIN EN ISO 24340:2012-04 2 A
4、 comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 219 “Floor coverings” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 24340:2012 by Technical Committee CEN/TC 134 “Resilient, textile a
5、nd laminate floor coverings”, (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Committee NA 054-04-05 AA Bodenbelge. Amendments This standard differs from DIN EN 429:1993-11 as foll
6、ows: a) Clause 2 “Terms and definitions” has been introduced; b) a video microscope has been included in Clause 4 “Apparatus”; c) Clause 6 “Atmosphere for conditioning and testing” has been revised; d) Clause 7 “Test procedure” has been modified; e) Clause 10 “Test report” has been modified. Previou
7、s editions DIN 51964: 1971-09, 1975-08 DIN EN 429: 1993-11 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 24340 February 2012 ICS 97.150 Supersedes EN 429:1993English Version Resilient floor coverings - Determination of thickness of layers (ISO 24340:2006) Revtements de sols rsilients - Dt
8、ermination de lpaisseur des couches (ISO 24340:2006) Elastische Bodenbelge - Bestimmung der Dicke der Schichten (ISO 24340:2006) This European Standard was approved by CEN on 24 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions fo
9、r giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in thre
10、e official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bod
11、ies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and U
12、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24340
13、:2012: EContents DIN EN ISO 24340:2012-04 EN ISO 24340:2012 (E) 2 Page Foreword 3 1 Scope 4 2 Terms and definitions .4 3 Principle 4 4 Apparatus .4 5 Sampling and selection of specimens 5 6 Atmosphere for conditioning and testing .5 7 Test procedure .5 7.1 Preparation .5 7.2 Calibration 5 7.3 Measur
14、ement 5 8 Calculation and expression of results .5 9 Precision statement .5 10 Test report 6 Bibliography 7 Foreword The text of ISO 24340:2006 has been prepared by Technical Committee ISO/TC 219 “Floor coverings” of the International Organization for Standardization (ISO) and has been taken over as
15、 EN ISO 24340:2012 by Technical Committee CEN/TC 134 “Resilient, textile and laminate floor coverings” the secretariat of which is held by BSI. 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 Augu
16、st 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent r
17、ights. This document supersedes EN 429:1993. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Franc
18、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 24340:2006 has been approved by CEN as a EN IS
19、O 24340:2012 without any modification. DIN EN ISO 24340:2012-04 EN ISO 24340:2012 (E) 3 1 Scope This International Standard describes a method for determining the thickness of different layers of resilient floor coverings. 2 Terms and definitions For the purposes of this document, the following term
20、s and definitions apply. 2.1 layer component of the same composition as part of a resilient floor covering with a given thickness, excluding factory finishes 3 Principle The thickness of layers is measured directly by optical means. 4 Apparatus 4.1 Microscope or video microscope 4.1.1 Microscope or
21、video microscope, having a magnification of at least 40, equipped with a micrometric scale eyepiece for the microscope or adjustable screen lines for the video microscope, readable to 0,01 mm. 4.1.2 Microscope or video microscope, having a magnification of at least 40, equipped with an eyepiece micr
22、ometric scale readable to 0,002 5 mm used to measure a thickness below 0,05 mm. 4.2 Lamp (light source), to illuminate the specimen configured so that the light falls on the specimen from as vertical a direction as possible. 4.3 Stage micrometer or video microscope, for calibrating the eyepiece micr
23、ometer. The scale shall have the smallest division equal to 0,01 mm and shall cover at least 2,54 mm for the microscope or video microscope referred to in 4.1.1, and the smallest division equal to 0,002 5 mm that covers at least 1 mm for the microscope or video microscope referred to in 4.1.2. 4.4 H
24、older (stage carrier), for holding the specimen without distortion, so that the cut edge is perpendicular to the optical axis of the microscope. 4.5 Sharp knife or blade, for cutting the specimen. 4.6 Straightedge or metal rule, for guiding the cutting edge. DIN EN ISO 24340:2012-04 EN ISO 24340:201
25、2 (E) 4 5 Sampling and selection of specimens 5.1 Use a fine sharp blade guided by a metal rule or straightedge and keep it perpendicular while cutting out test pieces. It is very important to cut the specimens face down on a polyamide or similar material board to ensure a clean edge. 5.2 For sheet
26、floor covering, select five specimens (10 mm 25 mm) evenly distributed across the width. 5.3 For tile floor covering, select one specimen (10 mm 25 mm) from each of five separate tiles from the carton or pack. 6 Atmosphere for conditioning and testing Condition the specimens for a minimum of 24 h at
27、 (23 2) C and at a relative humidity of (50 5) %, and test in the same environment. 7 Test procedure 7.1 Preparation Place the test piece on the mechanical stage carrier in the holding device, exposing its full thickness (long edge up, the cut surface perpendicular to the optical axis of the microsc
28、ope). 7.2 Calibration Calibrate the micrometer against the stage micrometer and record the calibration factor. 7.3 Measurement Locate the specimen under the microscope and adjust the light source. Focus the microscope so that both edges of the layer being measured are sharp. If this cannot be done,
29、remount or re-cut the specimen. Measure the thickness by counting the rulings or the divisions on the ruled disk in the eyepiece (read the measurement in the case of the video microscope) that cover the distance from one edge of layer to the other, and by applying the calibration factor determined i
30、n 7.2. Record this distance to the nearest graduation on the microscope or video microscope used. Take three readings in each specimen at least 10 mm apart. Repeat the procedure on the other test specimens. 8 Calculation and expression of results Calculate the mean thickness for each layer from the
31、number of measurements taken, and express these results to the nearest 0,01 mm or 0,002 5 mm respective to the microscope or video microscope used. 9 Precision statement An interlaboratory test will be conducted to determine the precision of this method. DIN EN ISO 24340:2012-04 EN ISO 24340:2012 (E
32、) 5 10 Test report The test report shall include the following information: a) a statement that the tests were performed in accordance with this International Standard (ISO 24340:2006); b) the complete identification of each sample, including type, source, colour, and manufacturers reference numbers
33、; c) the previous history of the sample; d) any deviation from this International Standard which may have affected the results; e) the thickness of the layer of the test specimen, which shall be the mean value calculated to the nearest 0,01 mm or 0,002 5 mm respective to the microscope or video micr
34、oscope used; f) the minimum and maximum readings to the nearest 0,01 mm or 0,002 5 mm respective to the microscope or video microscope used. DIN EN ISO 24340:2012-04 EN ISO 24340:2012 (E) 6 Bibliography 1 EN 429, Resilient floor coverings Determination of the thickness of layers 2 ASTM F 410, Standard test method for wear layer thickness of resilient floor coverings by optical measurement DIN EN ISO 24340:2012-04 EN ISO 24340:2012 (E) 7
