1、BS ISO21278-2:2008ICS 65.060.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDEquipment for cropprotection InductionhoppersPart 2: General requirements andperformance limitsThis British Standardwas published under theauthority of the StandardsPolicy and Strateg
2、yCommittee on 31 December2008 BSI 2008ISBN 978 0 580 59135 8Amendments/corrigenda issued since publicationDate CommentsBS ISO 21278-2:2008National forewordThis British Standard is the UK implementation of ISO 21278-2:2008.The UK participation in its preparation was entrusted to TechnicalCommittee AG
3、E/15, Equipment for crop protection and application ofliquid fertilizer.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct appli
4、cation.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 21278-2:2008Reference numberISO 21278-2:2008(E)ISO 2008INTERNATIONAL STANDARD ISO21278-2First edition2008-11-15Equipment for crop protection Induction hoppers Part 2: General requirements and performance li
5、mits Matriel de protection des cultures Incorporateurs Partie 2: Exigences gnrales et limites de performance BS ISO 21278-2:2008ISO 21278-2:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall no
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8、ember bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form o
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10、E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedBS ISO 21278-2:2008ISO 21278-2:2008(E) ISO 2008 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member
11、bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental
12、and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directive
13、s, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies c
14、asting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21278-2 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for
15、agriculture and forestry, Subcommittee SC 6, Equipment for crop protection. ISO 21278 consists of the following parts, under the general title Equipment for crop protection Induction hoppers: Part 1: Test methods Part 2: General requirements and performance limits BS ISO 21278-2:2008ISO 21278-2:2008
16、(E) iv ISO 2008 All rights reservedIntroduction The sprayer main tank may be connected to an introduction hopper in order to prevent chemical cross-contamination, contamination of the operator and of the environment. Currently two main different types of hopper are available on the market: introduct
17、ion hoppers, which are able to transfer the chemical into the main tank of the sprayer; induction hoppers, which are able to transfer the chemical product into the sprayer and partially mix the chemical product, and are able to carry out self-cleaning. ISO 21278 is applicable to induction hoppers fo
18、r fertilizers and plant protection products for agricultural crop protection machines and is aimed at verifying their functionality. BS ISO 21278-2:2008INTERNATIONAL STANDARD ISO 21278-2:2008(E) ISO 2008 All rights reserved 1Equipment for crop protection Induction hoppers Part 2: General requirement
19、s and performance limits 1 Scope This part of ISO 21278 specifies general requirements and performance limits for induction hoppers as specified in ISO 21278-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
20、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5681, Equipment for crop protection Vocabulary ISO 9357, Equipment for crop protection Agricultural sprayers Tank nominal volume and filling hole diameter ISO 21
21、278-1:2008, Equipment for crop protection Induction hoppers Part 1: Test methods 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5681 and ISO 21278-1 apply. 4 General requirements 4.1 Nominal volume The nominal volume level shall be permanently marke
22、d to show the maximum level to which the induction hopper can be safely filled during normal operations. 4.2 Opening size The opening size of the induction hopper shall be designed to allow: the filling of chemical products without splashing; the internal cleaning of cans of volumes up to at least 1
23、0 l (as specified in ISO 21278-1:2008, 6.8.2). 4.3 Prevention of internal contamination The induction hopper shall have means of protection to avoid the introduction of foreign matter when not in use. It shall be possible to inspect and to maintain the induction hopper when it is fitted with a cover
24、. BS ISO 21278-2:2008ISO 21278-2:2008(E) 2 ISO 2008 All rights reserved4.4 Bowl outlet The outlet for the mixed solution shall not be so large as to allow a ball of 20 mm diameter to pass through it. The induction hopper shall allow the operator to safely remove a ball of 20 mm diameter fallen in th
25、e induction hopper. 4.5 Free-standing induction hoppers The filling opening edge for free-standing induction hoppers shall not exceed a height of 1 000 mm from the ground. The free-standing induction hopper shall be designed to be stable, when used according to the information given in the instructi
26、on handbook, on firm ground with an inclination of 8,5 in any direction. This requirement shall be met with the bowl empty, then with the bowl full of water. 4.6 Induction hopper internal washing system Washing of the induction hopper shall be possible using clean water, either from a clean water ta
27、nk on the sprayer or from an external source. 4.7 Cleaning device for product cans The induction hopper shall be equipped with a cleaning device for crop protection product cans, and provided with an automatic shut-off valve for its operation. The activation of the liquid jet, when the can to be was
28、hed is in place, shall be safe. Washing of the can shall be possible using clean water, either from a clean water tank on the sprayer or from an external source. 4.8 Cover The cover, if any, shall be able to stay in the open position when the induction hopper is in use. The cover shall be equipped w
29、ith a closing system able to hold the cover shut tightly when necessary. The cover shall be attached either to the induction hopper or to the sprayer, so that the cover may not come into contact with the ground. 4.9 Controls When in operation all controls shall be positioned so that they can be easi
30、ly and safely operated from the working position. 4.10 Inspection It shall be possible for the operator to safely inspect the correct functioning of the induction hopper. 4.11 Prevention of back flow There shall be no back flow from the main tank to the induction hopper. BS ISO 21278-2:2008ISO 21278
31、-2:2008(E) ISO 2008 All rights reserved 34.12 Instruction handbook An instruction handbook shall be provided by the manufacturer. At least the following information shall be provided: type of product (liquid, micro-granules and/or powder) that can be used in the induction hopper; correct mounting, s
32、afe operation and cleaning (both for the operator and for the environment); height for filling the hopper, which shall not exceed 1 000 mm in the operating position, measured either from the ground or from the operator platform. 5 Performance limits 5.1 Nominal volume The nominal volume of the induc
33、tion hopper, as specified in ISO 21278-1:2008, 6.1.2, shall deviate less than 5 % from the value declared by the manufacturer. 5.2 Total volume The total volume of the induction hopper, as specified in ISO 21278-1:2008, 6.2.2, shall exceed the nominal volume by at least 10 %. 5.3 Level indicator If
34、present, the contents indicator scaling shall be in accordance with ISO 9357. It shall be durable and easily visible from the operators working position. The precision of the contents gauge scale shall be calculated as specified in ISO 21278-1:2008, 6.3.2. 5.4 Emptying flow rate The induction hopper
35、 tested according to ISO 21278-1:2008, 6.4.1, operating with the minimum inlet flow rate/pressure indicated by the manufacturer and with an outlet pressure of 20 kPa, shall provide an outlet flow rate of at least 60 l/min. 5.5 Emptying performance with powders When the test is performed according to
36、 ISO 21278-1:2008, 6.5.2, the amount of powder residue in the induction hopper bowl at the end of the test shall not exceed 2 % of the amount introduced in the hopper. 5.6 Emptying performance with micro-granular product When the test is performed according to ISO 21278-1:2008, 6.6.2, the amount of
37、micro-granular residue in the induction hopper bowl at the end of the test shall not exceed 2 % of the amount introduced into the hopper. 5.7 Efficiency of the induction hopper internal washing system The amount of test material residue in the induction hopper bowl after the washing procedure is car
38、ried out according to ISO 21278-1:2008, 6.7.2, shall not exceed 0,10 % of the induction hopper nominal volume. BS ISO 21278-2:2008ISO 21278-2:2008(E) 4 ISO 2008 All rights reserved5.8 Cleaning device for crop protection product cans After the cleaning procedure is carried out according to ISO 21278-
39、1:2008, 6.8.1, the volume of the test material residue shall be less than 0,01 % of the nominal can volume. 5.9 Evaluation of hydraulic tightness At the end of the tests carried out according to ISO 21278-1:2008, 6.9, no liquid shall have escaped from the induction hopper. BS ISO 21278-2:2008ISO 212
40、78-2:2008(E) ISO 2008 All rights reserved 5Bibliography 1 ISO 5682-2, Equipment for crop protection Spraying equipment Part 2: Test methods for hydraulic sprayers 2 ISO 22368 (all parts), Crop protection equipment Test methods for the evaluation of cleaning systems BS ISO 21278-2:2008ISO 21278-2:200
41、8(E) ICS 65.060.40 Price based on 5 pages ISO 2008 All rights reserved BS ISO 21278-2:2008This page has been intentionally left blank BS ISO21278-2:2008BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the i
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