1、BS ISO21278-1:2008ICS 65.060.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDEquipment for cropprotection InductionhoppersPart 1: Test methodsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 December2008
2、BSI 2008ISBN 978 0 580 55424 7Amendments/corrigenda issued since publicationDate CommentsBS ISO 21278-1:2008National forewordThis British Standard is the UK implementation of ISO 21278-1:2008.The UK participation in its preparation was entrusted to TechnicalCommittee AGE/15, Equipment for crop prote
3、ction 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 application.Compliance with a Briti
4、sh Standard cannot confer immunityfrom legal obligations.BS ISO 21278-1:2008Reference numberISO 21278-1:2008(E)ISO 2008INTERNATIONAL STANDARD ISO21278-1First edition2008-11-15Equipment for crop protection Induction hoppers Part 1: Test methods Matriel de protection des cultures Incorporateurs Partie
5、 1: Mthodes dessai BS ISO 21278-1:2008ISO 21278-1:2008(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 not be edited unless the typefaces which are embedded are licensed to and installed on the c
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8、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 or by any means, electronic or mechanical, including photocopying and microfilm, without pe
9、rmission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights re
10、servedBS ISO 21278-1:2008ISO 21278-1:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Test materials and equipment . 2 5 Test conditions . 2 5.1 General. 2 5.2 Environmental conditions 2 5.3 Liquid pr
11、essure . 3 5.4 Volumetric and flow-rate measurement . 3 5.5 Weight measurement 3 6 Test methods. 3 6.1 Nominal volume of the induction hopper. 3 6.2 Total volume of the induction hopper 3 6.3 Precision of the level indicator 4 6.4 Emptying flow rate 4 6.5 Emptying performance with powder. 5 6.6 Empt
12、ying performance with micro-granular product . 6 6.7 Efficiency of the induction hopper internal washing system. 6 6.8 Cleaning device for crop protection product cans . 7 6.9 Evaluation of hydraulic tightness . 9 7 Test report . 10 Annex A (normative) Micro-granular test material . 11 Annex B (norm
13、ative) Sticky reference product. 12 Annex C (informative) Example test report 13 Bibliography . 14 BS ISO 21278-1:2008ISO 21278-1:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO membe
14、r 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, governmenta
15、l 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 Directi
16、ves, 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
17、 casting 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 21278-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery fo
18、r 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 21278-1:2008ISO 21278-1:20
19、08(E) ISO 2008 All rights reserved vIntroduction 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: introduc
20、tion 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 f
21、or fertilizers and plant protection products for agricultural crop protection machines and is aimed at verifying their functionality. BS ISO 21278-1:2008BS ISO 21278-1:2008INTERNATIONAL STANDARD ISO 21278-1:2008(E) ISO 2008 All rights reserved 1Equipment for crop protection Induction hoppers Part 1:
22、 Test methods 1 Scope This part of ISO 21278 specifies the test methods for the verification of the performance limits of induction hoppers, as specified in ISO 21278-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere
23、nces, only 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 5682-2:1997, Equipment for crop protection Spraying equipment Part 2: Test methods for hydraulic spra
24、yers ISO 21278-2, Equipment for crop protection Induction hoppers Part 2: General requirements and performance limits 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5681 and the following apply. 3.1 induction hopper device having a bowl able to tran
25、sfer and partially mix any kind of liquid or solid plant protection products or fertilizers inside the main tank of the sprayer, and able to self-clean NOTE The device may be attached to the machine or free-standing, and able to be connected to the sprayer tank only for filling operations. 3.2 clean
26、ing device for crop protection product cans device for cleaning the inside of empty crop protection product cans BS ISO 21278-1:2008ISO 21278-1:2008(E) 2 ISO 2008 All rights reserved4 Test materials and equipment 4.1 Clean water, without any solids in suspension. 4.2 Solution of water with coloured
27、material, for its visual determination. 4.3 Copper oxychloride powder, as defined in Annex A of ISO 5682-2:1997. 4.4 Micro-granules, as specified in Annex A. 4.5 Sticky reference product, (as specified in Annex B). 4.6 Loading device, having an outlet internal diameter of between 30 mm and 40 mm, se
28、e Figure 1. Key 1 loading device (e.g. funnel) 2 induction hopper to be tested aOutlet diameter of the loading device. Figure 1 Scheme of the positioning of the loading device to load the powder or micro-granules into the induction hopper 5 Test conditions 5.1 General The induction hopper shall be t
29、ested following the manufacturers instructions as given in the instruction handbook and according to the nominal operating values declared by the manufacturer. 5.2 Environmental conditions The water temperature shall be between 5 C and 25 C. The environmental temperature, the test liquid temperature
30、, the relative humidity and the atmospheric pressure shall be recorded in the test report. BS ISO 21278-1:2008ISO 21278-1:2008(E) ISO 2008 All rights reserved 35.3 Liquid pressure The liquid pressure shall be measured with a maximum error 2,5 %; during the single test the working pressure may vary w
31、ithin 5,0 % of the average value. 5.4 Volumetric and flow-rate measurement The volumetric and flow-rate measurements shall be within 1,0 % error. 5.5 Weight measurement The weight measurement for introduced materials shall be within 10 g error. 6 Test methods 6.1 Nominal volume of the induction hopp
32、er 6.1.1 Test procedure Use the liquid as defined in 4.1. Place the induction hopper in the position recommended by the manufacturer, and then fill the bowl up to the maximum filling level as defined in the instruction handbook. 6.1.2 Results Measure the amount of test liquid inside the bowl. The te
33、st results shall be expressed in litres (l). 6.2 Total volume of the induction hopper 6.2.1 Test procedure Use the liquid as defined in 4.1. Place the induction hopper in the position recommended by the manufacturer. If present, the cover is to be open during operation. Continue to fill the bowl up
34、to its upper edge. 6.2.2 Results Measure the amount of test liquid inside the bowl. Results shall be reported in litres (l). The percentage gap (Vover) between nominal volume (Vnom) and total volume (Vtotal) of the induction hopper shall be calculated as follows: ()total nomovernom100VVVV= BS ISO 21
35、278-1:2008ISO 21278-1:2008(E) 4 ISO 2008 All rights reserved6.3 Precision of the level indicator 6.3.1 Test procedure Use the liquid as defined in 4.1. Place the empty induction hopper in the position recommended by the manufacturer and then: a) fill the bowl up to the first reading point of the fil
36、ling level as defined in the instruction handbook and determine the amount of water introduced (Xmeas); b) continue with the procedure as given in 6.3.1 a) for all the successive reading points. 6.3.2 Results The test results shall be expressed as percentages of nominal value (Xnom). The accuracy sh
37、all be calculated as follows: ()meas nomnom100AccuracyXXX= 6.4 Emptying flow rate 6.4.1 Test procedure Use the liquid as defined in 4.1. The emptying flow rate shall be determined measuring the time needed for a known amount of clean water to exit from the induction hopper bowl. The tests shall be m
38、ade with the following operational parameters: a) inlet flow rate (pump flow rate): maximum and minimum values declared by the manufacturer; in addition flow rates at two intermediate points should be measured, if applicable; b) outlet pressure: at least with the maximum value declared by the manufa
39、cturer and 20 kPa. The outlet pressure shall be measured on the induction hopper pipe outlet after the suction device at a distance equal to 10 times the pipeline mean internal diameter, at the same height of the outlet (see Figure 2); c) outlet pipeline internal diameter: value declared by the manu
40、facturer. Operate with the induction hopper in stable conditions. Make at least three replications of the test. The difference between the data of the three replications shall not exceed a coefficient of variation value of 10 %. BS ISO 21278-1:2008ISO 21278-1:2008(E) ISO 2008 All rights reserved 5Ke
41、y 1 induction hopper pipe inlet 2 induction hopper pipe outlet 3 known volume of water (e.g. 10 l) 4 beginning of the induction hopper pipe outlet and measuring point of the induction hopper pipe outlet diameter 5 pressure gauge for the measurement of the outlet pressure 6 injector position aDistanc
42、e between the outlet pressure measuring point and the beginning of the induction hopper pipe outlet (equal to 10 times the induction hopper pipe outlet diameter). Figure 2 Scheme of the outlet pressure measurement 6.4.2 Results The results shall be given in l/min from the outlet of the induction hop
43、per according to the pump flow rate and according to the outlet pressure. 6.5 Emptying performance with powder 6.5.1 General The emptying performance with powders shall be determined measuring the amount of powder residue in the induction hopper bowl after the test. 6.5.2 Test procedure Use the test
44、 material as defined in 4.3 and apply the following procedure. a) Operate the induction hopper following the manufacturers instructions as given in the instruction handbook and according to the nominal operating values declared by the manufacturer. Then, introduce 0,1 kg of the test material per 1 l
45、 of its nominal capacity with a continuous flow. To ensure continuity, a loading device as given in 4.6 shall be positioned as recommended by the manufacturer. b) Operate the system for a time of 60 s. The outlet pressure during the test shall be at least the maximum pressure as defined by the manuf
46、acturer. BS ISO 21278-1:2008ISO 21278-1:2008(E) 6 ISO 2008 All rights reservedc) Remove the residual test material from the induction hopper bowl, including cover (if present), using a known amount of water and collect it in a separate tank. d) Take at least three representative samples W 50 ml from
47、 the homogenous volume of rinsing liquid. e) The samples shall be analysed by a drying technique at a temperature of between 105 C and 110 C. Another technique, giving equivalent values and accuracy, can be used. Measure the weight of the test material residues with the accuracy as defined in 5.5. f
48、) Calculate the total amount of the test material residue in the induction hopper bowl and report the average value, in grams (g), and as a percentage of the amount originally introduced. The values obtained from three samples shall not be higher than 10 % of the mean value. 6.6 Emptying performance
49、 with micro-granular product 6.6.1 General The emptying performance with micro-granules products shall be determined measuring the amount of micro-granules residue in the induction hopper bowl after the test. 6.6.2 Test procedure Use test material as defined in 4.4 and apply the following procedure. a) Operate the induction hopper following the manufacturers instructions as given in the instruction handbook and according to the nominal operating values declared by the manufacturer. T
