1、BRITISH STANDARD BS 8412:2004 Equipment for crop protection Performance requirements for application systems used to make spatially variable applications to field crops Specification ICS 65.060.40 BS 8412:2004 This British Standard was published under the authority of the Standards Policy and Strate
2、gy Committee on 4 June 2004 BSI 4 June 2004 The following BSI references relate to the work on this British Standard: Committee reference AGE/15 Draft for comment 04/301687 DC ISBN 0 580 43814 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted t
3、o Technical Committee AGE/15, Equipment for crop protection and the application of liquid fertiliser, upon which the following bodies were represented: AEA Agricultural Engineers Association Biotechnical and Biological Silsoe Sciences Research Centre British Agrochemicals Association Ltd. Garden Ind
4、ustry Manufacturers Association HSE Health and Safety Executive Imperial College of Science and Technology MAFF Ministry of Agriculture, Fisheries and Food Amendments issued since publication Amd No. Date CommentsBS 8412:2004 BSI 04 June 2004 i Contents Page Committees responsible Inside front cover
5、 Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Specifications 2 Annex A (normative) Verification 3BS 8412:2004 ii BSI 04 June 2004 Foreword This British Standard was prepared by Technical Committee AGE/15. This British Standard calls for the use of subs
6、tances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. This British Standard is designed for use by appropriately qualifie
7、d and competent people. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages
8、This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued.BS 8412:2004 BSI 04 June 2004 1 1 Scope This British Standard specifies five levels of performanc
9、e for boom sprayers designed to make spatially variable applications of crop protection chemicals to arable crops. It also specifies a verification procedure. This standard is applicable to configurations of tractor mounted, trailed and self-propelled sprayers with a boom width of greater than 6.0 m
10、. Small boom sprayers with boom widths of less than 6.0 m that could be used in amenity areas or horticultural production are not within the scope of this standard. The purpose of the standard is to enable recommendations for the spatially variable application of plant protection products to be made
11、 using the defined five performance levels. Performance levels are defined in relation to the range of dose rates that can be delivered and the spatial resolution of the application only. It is recognized that other application factors and variables can be adjusted as part of the operation and contr
12、ol strategy of a spatially variable application systems. Such variables may include: volume rate; spray liquid concentration; spray quality; nozzle angle; forward speed; boom height. Some of these variables may be changed in order to effect a change in the applied dose rate and in this way are cover
13、ed by this standard. Matching delivery conditions other than dose rate at defined resolution is beyond the scope of this standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the reference cited applies.
14、 For undated references, the latest edition of the referenced document (including any amendments). BS 6356-1:1997, Spraying equipment for crop protection Part 1: Method of test for sprayer nozzles. (ISO 5682-1:1996) BS EN 907:1997, Sprayers and liquid fertiliser distributors Safety. BS EN 12761-2, A
15、gricultural and forestry machinery Sprayers and liquid fertilizer distributors Environmental protection Part 2: Field crop sprayers. 3 Terms and definitions For the purposes of this British Standard, the following terms and definitions apply. 3.1 full dose rate maximum recommended rate on the label
16、of the plant protection product used 3.2 performance level levels, referred to as “Level 1” to “Level 5”, for equipment designed for the spatially variable application of plant protection products, relating to: a) the range of dose rates that the equipment can deliver whilst maintaining an equivalen
17、t spray quality in terms of drift and target deposition at a defined forward speed; and b) the spatial resolution in both directions; along the boom and in the direction of travel.BS 8412:2004 2 BSI 04 June 2004 4 Specifications 4.1 General The sprayer shall conform to BS EN 907:1997 and BS EN 12761
18、-2. It shall be capable of delivering the required dose to an accuracy of better than 5 % when operating at steady state when tested according to BS 6356-1:1997. 4.2 Performance levels Five performance levels shall be defined as follows: Level 1: a system capable of delivering dose rates in the rang
19、e 75 % to 100 % of full dose across the full working width of the sprayer; Level 2: a system capable of delivering dose rates in the range 50 % to 100 % of full dose across the full working width of the sprayer; Level 3: a system capable of delivering dose rates in the range 25 % to 100 % of full do
20、se across the full working width of the sprayer or 24 m, whichever is the smaller; Level 4: a system capable of delivering dose rates in the range 25 % to 100 % of full dose across the full working width of the sprayer or 12 m, whichever is the smaller; Level 5: a system capable of delivering dose r
21、ates in the range 25 % to 100 % of full dose across the full working width of the sprayer or 6 m, whichever is the smaller. The sprayer shall conform to at least Level 1. For all levels, the system shall be capable of achieving a resolution in the direction of travel that is equal or better than res
22、olution in the transverse direction. 4.3 Verification The sprayer shall be verified in accordance with Annex A.BS 8412:2004 BSI 04 June 2004 3 Annex A (normative) Verification Measurements of flow rate and droplet size distribution within the spray shall be made from a given length of boom using the
23、 methods defined in BS 6356-1:1997. The measurements of droplet size distribution and flow rate from a given length of boom shall be made when operating at conditions corresponding to full dose rate and the reduced dose rate consistent with the performance level to be claimed. For a given instrument
24、, droplet spectra measured over the range claimed shall conform to: NOTE Measurements of flow rate and droplet size distribution within the spray are under study.and where is the volume median diameter of the droplet spectrum measured for individual settings; is the mean value of the volume median d
25、iameters of the droplet spectra measured over the range claimed; is half the difference between median diameters of the droplet spectra for the reference nozzles. Flow rates shall be accurate to 10 % throughout the claimed range. D V,0.5 D V,0.5 %D + D V,0.5 D V,0.5 %D + D V,0.5 D V,0.5 %DBS 8412:20
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