1、BRITISH STANDARD BS EN 1081:1998 Resilient floor coverings Determination of the electrical resistance The European Standard EN1081:1998 has the status of a British Standard ICS 97.150BSEN1081:1998 This British Standard, having been prepared under the directionof the Sector Board forMaterials and Che
2、micals, waspublished under the authority of the Standards Board and comes into effect on 15May1998 BSI 04-1999 ISBN 0 580 29701 2 National foreword This British Standard is the English language version of EN 1081:1998. The UK participation in its preparation was entrusted to Technical Committee PRI/
3、60, Resilient floor coverings, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European development
4、s and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue u
5、nder the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
6、 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 7 and a back cover. This standard has been updated (see copyright da
7、te) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN1081:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 1081 3ii blankEUROPEAN
8、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1081 January 1998 ICS 97.150 Descriptors: Floor coverings, tests, determination, electrical resistance English version Resilient floor coverings Determination of the electrical resistance Revtements de sol rsilients Dtermination de la rsistance lectrique
9、Elastische Bodenbelge Bestimmung deselektrischen Widerstandes This European Standard was approved by CEN on 23 November 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard w
10、ithout any alteration. 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 languag
11、e made by translation under 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, CzechRepublic, Denmark, Finland, France, Germany, Greece, Icel
12、and, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of expl
13、oitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1081:1998 EEN1081:1998 BSI 04-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 134, Resilient and textile floor coverings, the secretariat of which is held by BSI. Thi
14、s 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 July 1998, and conflicting national standards shall be withdrawn at the latest by July 1998. According to the CEN/CENELEC Internal Regulations, the nat
15、ional standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
16、Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Sampling 3 5 Apparatus and reagents 3 6 Method A: for vertical resistance, R 1 3 7 Method B: for resistance to earth, R 2 5 8 Method C: for surface resistance R 3 6 9 Calculation and expression of results 6 10 Test report
17、6 Figure 1 Tripod electrode 4 Figure 2 Testing of vertical resistance 5 Figure 3 Distance between sides of tripod electrodes 6 Figure 4 Testing of surface resistance 7EN1081:1998 BSI 04-1999 3 1 Scope This European Standard specifies the determination for the vertical resistance of a floor covering,
18、 one determination for the surface resistance of a floor covering and one determination for the resistance to earth of a floor covering after installation. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative re
19、ferences are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references t
20、he latest edition of the publication referred to applies. IEC 93:1980, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between10IRHD and100IRHD). 3 Definitions For
21、 the purposes of this standard the following definitions apply. 3.1 vertical resistance R 1 electrical resistance measured between a tripod electrode (see Figure 1) on the surface of a test piece and an electrode attached to the underside of the test piece (seeFigure 2) 3.2 resistance to earth R 2 e
22、lectrical resistance measured between a loaded tripod electrode on the surface of a laid floor covering and earth 3.3 surface resistance R 3 electrical resistance measured between two tripod electrodes (seeFigure 4) set up at a fixed distance of100mm apart on a laid floor covering (seeFigure 3) 4 Sa
23、mpling Take a representative sample from the whole of the available material. In the case of rolls, take approximately a third of the test pieces from the area close to the edges, the distance between the outer edge of the sample and the nearest edge of the roll being between50mm and100mm. 5 Apparat
24、us and reagents 5.1 Tripod electrode (seeFigure 1), capable of comprising a triangular aluminium plate with an insulating layer on the upper surface and three cylindrical feet of conductive rubber on the underside at a distance of 180mm apart. The rubber feet shall have a hardness in accordance with
25、 ISO48 of50IRHD to 70IRHD, and the electrical resistance of each rubber foot shall be less than 10 3 7 when tested between two metal surfaces. NOTEA “soft electrode” such as that described above is able to provide a more intimate contact with a smooth floor covering and in practice this type of elec
26、trode has been found to be the most satisfactory. 5.2 A load, capable of exerting a minimum force of300N on the tripod electrode. NOTEThis can be achieved by using a persons body weight. In method C, one person may stand with a foot on each electrode. 5.3 Resistance meter (seeFigure 2), calibrated t
27、o determine the resistance R of a floor covering to anaccuracy of 5% in the range 10 3 7 to 10 10 7 and an accuracy of 10% for greater than 10 10 7. For resistances less than or equal to 10 6 7 the open circuit voltage shall be 100 Vd.c.and for resistances greater than 10 6 7 it shall be 500Vd.c. NO
28、TEA test instrument with internal resistance of100k7 and a circuit conforming to IEC93 annex 2.2 and compatible with digital instrument reading of the current, is recommended. 5.4 Test instruments, for measuring temperature with an accuracy of 2C and relative humidity with an accuracy of 5%. 6 Metho
29、d A: for vertical resistance, R 1 6.1 Principle The vertical resistance between a surface electrode and an electrode attached to the underside of a test piece is measured using a defined voltage and a resistance meter. 6.2 Additional apparatus and reagents 6.2.1 Apparatus 6.2.1.1 Conductive underlay
30、 acting as a base electrode, e.g.a metal plate, of dimensions larger than the test piece. 6.2.1.2 Air-circulating oven, capable of being maintained at (40 2)C.EN1081:1998 4 BSI 04-1999 Figure 1 Tripod electrodeEN1081:1998 BSI 04-1999 5 6.2.2 Reagents 6.2.2.1 Graphite suspension, colloidal graphite o
31、f a type that dries in air at room temperature. 6.2.2.2 Cleaning fluid, e.g.ethanol, isopropanol. 6.3 Preparation of test pieces Take either three tiles from a batch or three test pieces of minimum side length400mm from a sheet. Clean the test piece with cleaning fluid. After cleaning, coat the unde
32、rside of the test piece with a stabilized, diluted graphite suspension, and dry in an oven at a temperature of (40 2)C for a minimum of96h. 6.4 Conditioning Condition the test pieces at a temperature of (23 2)C and relative humidity of (50 5)% for a minimum of48h. Maintain this climate during labora
33、tory testing. Other climates may be used, if agreed between the parties involved. 6.5 Procedure Place the cleaned tripod electrode on the surface of the test piece and connect it to the resistance meter. In addition, connect the base electrode to the resistance meter. Press the tripod electrode to a
34、pply a load exerting a minimum force (F) of300N on the test piece and switch on the voltage. NOTEThe smooth application of this load ensures a good electrical current. Take the resistance or current reading10s to15s after switching on. Repeat this procedure after repositioning the tripod electrode.
35、7 Method B: for resistance to earth, R 2 7.1 Principle The electrical resistance of a laid floor covering is measured between a surface electrode and earth. 7.2 Preparation of test pieces Carry out the test in situ a minimum of48h after laying. Before taking any measurements, remove all dirt from th
36、e floor covering in accordance with the manufacturers instructions. 7.3 Procedure Record the temperature and relative humidity. Place the cleaned tripod electrode on the surface of the dry floor covering and connect it to the resistance meter. In addition, connect the earth to the resistance meter.
37、Press the tripod electrode to apply a load exerting a minimum force of300N on the floor covering and switch on the voltage (seeNOTE in6.5). Take the resistance reading10s to15s after switching on. Repeat the procedure, if required, after repositioning the tripod electrode. For areas 10m 2at least th
38、ree readings shall be taken. For greater areas, the number of readings shall be agreed between the contracting parties. Figure 2 Testing of vertical resistanceEN1081:1998 6 BSI 04-1999 8 Method C: for surface resistance R 3 8.1 Principle The electrical resistance of a laid floor covering is measured
39、 on the surface between two electrodes. 8.2 Preparation of test pieces Carry out the test in situ a minimum of48h after laying. Before taking any measurements, remove all dirt from the floor covering in accordance with the manufacturers instructions. 8.3 Procedure Record the temperature and relative
40、 humidity. Place two cleaned tripod electrodes, separated by a distance of100mm, on the surface of the dry floor covering (seeFigure 3). Press each of the electrodes to apply through each, a load exerting a minimum force of300N on the floor covering (seeFigure 4) and switch on the voltage (see NOTE
41、in6.5). Take the resistance or current reading10s to15s after switching on. Repeat this procedure, if required, after shifting the tripod electrode(s). For areas 10m 2take at least 3 readings. For greater areas, the number of readings shall be agreed between the parties involved. 9 Calculation and e
42、xpression of results 9.1 Direct reading resistance meter Record each value to two significant figures. 9.2 Resistance meter conforming to A.2.2 of IEC 93:1980 Calculate each value of electrical resistance in ohms to three figures by the equation: where: NOTEThe voltage at the floor covering U xis au
43、tomatically fixed by the value of R x . Calculate the value of U xin volts by the equation: where: 10 Test report The test report shall contain the following information: a) a reference to this standard, i.e. EN1081 Method A, B or C; b) a complete identification of the product tested, including type
44、, source, colour and manufacturers reference numbers; c) previous history of the sample; d) temperature and relative humidity during the test; e) the applied voltage; f) for method A: the mean, maximum and minimum values of vertical resistance; g) for method B: the mean and individual values of resi
45、stance to earth; the mode and date of laying; h) for method C: the mean and individual values of surface resistance; the installation system and date of laying; i) any deviation from this standard which may have affected the results. Figure 3 Distance between sides of tripod electrodes R x R i I i I
46、 x -1 = R x is the electrical resistance R 1or R 2or R 3in ohms (7); R i is 100 k7,i.e. the internal resistance of the instrument; I i is the current without floor covering in milliamperes (mA); I x is the current with floor covering in milliamperes (mA). U o is the open circuit voltage in volts (V)
47、. U x R x R x R i + - U o =EN1081:1998 BSI 04-1999 7 Figure 4 Testing of surface resistanceBS EN 1081:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in
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