EN 12580-2013 en Soil improvers and growing media - Determination of a quantity《土壤改进剂和培养基 量的测定》.pdf

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1、BSI Standards PublicationBS EN 12580:2013Soil improvers and growingmedia Determination of aquantityBS EN 12580:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12580:2013. Itsupersedes BS EN 12580:2000 which is withdrawn.The UK participation in its preparati

2、on was entrusted to TechnicalCommittee AW/20, Top soil, other growing media and turf.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its

3、correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 76739 5ICS 65.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strateg

4、y Committee on 30 November 2013.Amendments issued since publicationDate Text affectedBS EN 12580:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12580 October 2013 ICS 65.080 Supersedes EN 12580:1999English Version Soil improvers and growing media - Determination of a quantity Amendements o

5、rganiques et supports de culture - Dtermination de la quantit Bodenverbesserungsmittel und Kultursubstrate - Bestimmung der Menge This European Standard was approved by CEN on 31 August 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for

6、 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 three

7、 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 bodi

8、es of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Sp

9、ain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwi

10、de for CEN national Members. Ref. No. EN 12580:2013: EBS EN 12580:2013EN 12580:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and abbreviated terms 6 5 Principle 6 6 Apparatus .6 7 Calibration of the measure .8 8 Sampling .

11、9 9 Procedure .9 10 Calculation and expression of results 10 10.1 Bulk density . 10 10.2 Volume . 10 11 Precision 11 12 Test report for declarations of volume . 11 13 Declaration of quantity by weight . 11 14 Test report for declarations of weight 12 Annex A (informative) Results of an interlaborato

12、ry trial to determine bulk density . 13 Bibliography . 14 BS EN 12580:2013EN 12580:2013 (E) 3 Foreword This document (EN 12580:2013) has been prepared by Technical Committee CEN/TC 223 “Soil improvers and growing media”, the secretariat of which is held by ASI. This European Standard shall be given

13、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. Attention is drawn to the possibility that some of the elements of this document may be the

14、 subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12580:1999. The main changes are listed below: it reflects the provisions of EN 15238 and EN 15761; more detail is provided on how to carry out the d

15、ensity determination of the product; it includes a method to calibrate the measure. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Rep

16、ublic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, 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. BS

17、EN 12580:2013EN 12580:2013 (E) 4 Introduction Soil improvers and growing media are generally traded by volume as the weight of the product can be greatly affected by the moisture content. It is important for both consumers and traders to know the volume of product being traded. Furthermore, for the

18、cultivation of plants, it is the volume of the product, and not the weight, that is generally important. The volume is calculated from knowing the weight and bulk density of the product, the latter being determined from weighing a known reference volume of product. For those materials traded by refe

19、rence to its mass, this document recognises the effects the moisture content can have on the quantity declared. Therefore the principle is that for such transactions any weight should be accompanied by the moisture content so that the solid matter content can be calculated. As some soil improvers an

20、d growing media are compressible (and some may be presented in compressed blocks or bales), it is important that this aspect be addressed in the method of determining the bulk density. A suitably competent person should undertake this testing. Even for materials traded by volume, the moisture conten

21、t can have an effect as high moisture levels increase agglomerations, can reduce the ability to decompress or reconstitute materials, reduce their flow characteristics and give higher apparent bulk densities and lower volumes. The preparation and sampling of all materials prior to quantity determina

22、tion is covered in EN 12579. Quantity determination will be performed as soon as possible after preparation and sampling. BS EN 12580:2013EN 12580:2013 (E) 5 1 Scope This European Standard specifies methods for the determination of a quantity of soil improvers and growing media in bulk and in packag

23、es. This is a reference method, which is designed with an appropriate precision level so that it can be used to validate any quantity declaration made. This standard is applicable to material that is in solid form, reconstituted if necessary, but not to blocks sold as such by dimension; for these, s

24、ee EN 15761. This method is not applicable for material with more than 10 % (V/V) of particles greater than 60 mm in size; for these, see EN 15238. The requirements of this standard may differ from the national legal requirements for the declaration of the products concerned. Where there is no legal

25、 requirement to use this method, for example in quantity control of packaged product, then it is permissible for any other methods to be used so long as these other methods can be demonstrated to be comparable with this standard method in giving the same quantity with the same precision. Material wh

26、ich has become excessively wet and which cannot be easily broken down into a flowable material will not be suitable for the determination of quantity and may not give a representative result. However, because of the diverse nature and bulk density of these materials, it is not possible to quantify w

27、hat is excessive. This standard is intended to be used by manufacturers, buyers and enforcement agencies in verifying claims made for these products. It is not intended that it should necessarily be used for the purpose of manufacturing control. 2 Normative references The following documents, in who

28、le or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12579:2013, Soil improvers and grow

29、ing media Sampling EN 13040, Soil improvers and growing media Sample preparation for chemical and physical tests, determination of dry matter content, moisture content and laboratory compacted bulk density EN 45501, Metrological aspects of non-automatic weighing instruments 3 Terms and definitions F

30、or the purposes of this document, the following terms and definitions apply: 3.1 batch lot quantity of goods manufactured by the same process under the same conditions and labelled in the same manner and assumed to have the same characteristics 3.2 bulk material material that is not packaged BS EN 1

31、2580:2013EN 12580:2013 (E) 6 3.3 container container in which material is delivered, including a lorry, ship, boat and package 3.4 bulk density apparent density of material as received or reconstituted Note 1 to entry: The reconstitution is in accordance with the manufacturers instructions or as req

32、uired by EN 12579:2013, 6.4.4, as determined by the method specified in this standard. Note 2 to entry: Bulk density in this standard refers to the apparent density in air (based on conventional mass) and not the density in vacuum. 3.5 package container in which the goods are delivered and which rem

33、ains with them after delivery Note 1 to entry: A package may be a loose-filled sack typically up to 100 l, a compressed block or bale and even a big bale, typically of 4 m3or more. 3.6 strike transparent sheet of flat material, normally glass, which is easily large enough to cover the top of the mea

34、sure 4 Symbols and abbreviated terms D bulk density of material, as determined by the method specified in this standard V volume of material, in litres mxmass of an item, in grams 5 Principle 5.1 For each batch of material, whether for delivery in bulk or in packages, the quantity of material is det

35、ermined and reported either by volume or by weight. The unit of measurement (weight or volume) used for the quantity declaration needs to comply with national regulations where they exist. 5.2 Where the quantity declared is by volume then the material is weighed and then sampled and its bulk density

36、 is determined. From this information, the volume is then calculated. Clauses 6 to 11 of the standard apply. 5.3 Where the quantity declared is by weight then the moisture content is also determined so that the dry matter weight can be determined and declared. Clauses 12 and 13 of the standard apply

37、. NOTE The structure of the material can change with time and handling and this can affect the volume of the material. 6 Apparatus 6.1 Measure, rigid, 20 l 0,4 l with a height to diameter ratio between 0,9:1 and 1:1. The volume V1shall be known to the nearest 10 ml at 20 C, with an uncertainty of me

38、asurement (k = 2) of no more than 50 ml. A standard 300 mm internal diameter pipe of height 283 mm with an end cap can be suitable. BS EN 12580:2013EN 12580:2013 (E) 7 The apparent weight of 1 l of water at 20 C is 997,15 g. Therefore no air buoyancy correction needs to be made. NOTE Information abo

39、ut the measurement and expression of uncertainty is given in the OIML Guide (G1) to the expression of uncertainty in measurement (sometimes referred to as GUM). 6.2 Collar, rigid, of the same diameter as the measuring cylinder (6.1) and with a height of 75 mm 2 mm. 6.3 Fall controller, of either 20

40、mm 0,6 mm or 40 mm 1,3 mm or 60 mm 2 mm mesh size as required (see 9.5), held not more than 50 mm above the collar, equipped with locating lugs to enable it to sit on the collar correctly without friction. NOTE Wires crossing each other at right angles form the mesh with the appropriately sized squa

41、re holes. Ideally the fall controller should be separated from the measure to avoid jogging or vibrating material in the measure during the filling process. Key a is the Fall controller (6.3) b is the Collar (6.2) c is the Measuring cylinder (6.1) NOTE 1 For convenience and ease of use it is advisab

42、le to have 3 handles on the cylinder and 2 on the filling collar and the fall controllers. NOTE 2 For stability it is useful to have three short legs/feet on the base of the measuring cylinder. Figure 1 Diagrammatic representation of the way the apparatus as described in 6.1 to 6.3, the fall control

43、ler, filling collar and measuring cylinder, are assembled BS EN 12580:2013EN 12580:2013 (E) 8 6.4 Weighing instrument. For packaged material, the weighing instrument shall conform to Table 1 with class III tolerances as specified in EN 45501, unless more restrictive provisions exist in national regu

44、lations. For bulk material, the weighing instrument shall conform to class III of EN 45501. NOTE National legislation is likely to require that the equipment be verified before use, and so it will be marked with the CE mark and a green M to show it is legal to use for trade purposes, as required by

45、European Directive 2009/23/EC. Table 1 Maximum scale intervals for weighing instruments Mass Maximum scale interval for analogue scales Maximum scale interval for digital scales kg g g 1 to 2,5 10 5 2,5 to 5 20 10 5 to 10 50 20 10 to 40 100 50 40 200 100 6.5 Straight-edge, rigid, of rectangular cros

46、s section, of thickness not exceeding 5 mm, preferably with a sharp edge, and at least 500 mm long. 7 Calibration of the measure To calibrate the measure, place the measure and sufficient distilled water together in a room so that the temperature of both stabilises. Determine the temperature, t. Wei

47、gh it empty together with a strike (3.6), mass me. Weighings shall be made in grams on a weighing instrument with no greater than 10 g divisions, which complies with EN 45501. Fill to the brim with water using the strike. When the water level is near the top of the measure, start to slide the strike

48、 onto the rim of the measure and pick up the meniscus of the water on its underside. Filling continues gradually, continuing to slide the strike over the surface of the measure so that no air bubbles are trapped under it. The measure is completely filled when the strike covers the top of the measure

49、 without any air being trapped under it. Weigh the filled measure and strike in grams, mass, mf. Calculate the mass of water: wfe=m mm (1) Calculate the volume of water by multiplying by the factor given in the table below. This gives the volume of the measure, Vt, in litres, at the temperature, t, at which it has been calibrated. BS EN 12580:2013EN 12580:2013 (E) 9 Table 2 Multiplication factor at various temperatures for the calculation of the volume of the measure Temperature C 10 11 12 13 14 15 16 17 18 19 Factor (l/kg) 1,001 35 1,001