ISO-8524-1986.pdf
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1、International Standard 8524 0 * 4 4ii INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEYHAPOHAR OPAHH3ALblR DO CTAHAPTM3ALWlM*ORGANlSATlON INTERNATIONALE DE NORMALISATION F /.2 i ; .“.,“., t ., , Equipment for distributing granulated pesticides or herbicides - Test method Mat b) type of feed mechanis
2、m and types of granules (if the device includes several interchangeable mechanisms) which can be distributed by each model; c) types of granules which the distributor can distribute; d) accessories required for distributing certain types of granules; e) minimum and maximum flow rates of the emptying
3、 device of each feed mechanism for each granule; f) if the basic machine is fitted with pneumatic tyres, the inflation pressure, in bars.*) 4.1.3 Checking of specifications The relevant technical characteristics supplied by the manufac- turer shall be checked and noted in the test report. When com-
4、paring laboratory test results with application rate and flow rate data supplied by the manufacturer, it should be noted that manufacturer s data may have been adjusted for wheel slip- paw. 4.2 Granules 4.2.1 Types Tests shall be carried out with up to three different granular materials indicated by
5、 the manufacturer of the distributor. If, for safety reasons, the test has to be carried out with simulated granulated products, not more than three of the following types should be used: a) Pumice stone (common quality): - poor flow qualities, rough, coarse, hard; - bulk density: approximately 0,4
6、g/cm3; - granule size: 1.0 to I,6 mm for more than 85 % of the mass. b) Quartz: - good flow qualities, round, fine grained, hard, heavy; - bulk density: approximately I,4 g/cm3; - granule size: 0,5 to I,0 mm for more than 85 % of the mass. cl Calcite : - wide distribution of granule size, heavy, sof
7、t; - bulk density: approximately I,4 g/cm3; - granule size: 0,4 to I,0 mm for more than 85 % of the mass. d) Gypsum: - good flow qualities, round, soft; - bulk density: approximately 0,9 g/cm3; - granule size: 0,4 to 0,9 mm for more than 85 % of the mass. e) Any other granulated product which the te
8、st office and manufacturer considers of sufficient importance and the physical properties of which differ from the products in- dicated above. The granulated products used shall be listed in the test report. 4.2.2 Physical characteristics The following physical characteristics of the granules used i
9、n the test shall be determined : particle size distribution, bulk den- sity, water content, slope angle. The type of simulated pro- duct, if appropriate, shall also be stated. 4.3 Ambient conditions Atmospheric humidity and temperature at the time of the test shall be noted in the test report. 5 Man
10、datory tests31 5.1 Nature of tests (see annex A) These tests shall allow determination of the evenness of the flow rate and of distribution and will include both static and mobile measurements. 5.1.1 Static tests With the distributor stationary, the drive wheel, if it exists, shall rest on the drive
11、 mechanism. The drive wheel or any other power input shall be driven at a speed equal to that which it would have for actual work, i.e. at the theoretical forward speed of the distributor travelling without slipping. 5.1.2 Mobile tests The distributor shall be driven at a constant speed over a hard,
12、 uniform surface. 1) These instructions shall be attached to the test report. 2) 1 bar = 105 Pa = 100 kPa (exactly). 3) For the optional tests, see annex B. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997254500
13、1 Not for Resale, 04/20/2007 02:46:44 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8524-1986 (E) 5.2 Distance between the feed mechanism and the surface Care shall be taken that the outlet of the mechanism is placed at the same average distance from the surface (coll
14、ecting boxes) as in actual working conditions. 5.3 Types of tests 5.3.1 Evenness of flow rate The test shall be carried out with the machine stationary, with at least three feed mechanisms to compare their flow rates. The granules shall be collected in boxes placed under the feed mechanism or, for e
15、xample, under the pipes or fishtails, where fitted. NOTE - Air-assisted distributors need not have three feed mechanisms. 5.3.2 Evenness of distribution 5.3.2.1 Test conditions The test shall be carried out on a moving machine with at least three feed mechanisms. The granules shall be collected in b
16、oxes placed on the ground. The collecting boxes shall have external dimensions of approxi- mately 100 mm x 100 mm and a depth of approximately30 mm. .E E E m r 5 f 2 F The boxes shall be of anti-static material and provision shall be made to avoid loss through rebounding. Sloping walls allow the gra
17、nules to empty into a weighing bowl, while preventing foreign bodies from falling into the bowl. Cardboard boxes covered in plastic have proved satisfactory. Ensure that only the feed mechanisms under test direct their flow into the boxes, flow from the other feed mechanisms be- ing deflected but no
18、t stopped, which could influence the discharge. NOTE - Air-assisted distributors need not have three feed mechanisms. 5.3.2.2 Arrangement of boxes 5.3.2.2.1 Arrangement of boxes for spot distribution Thirty collecting boxes shall be placed at each spot where the granules are to be dropped in the dir
19、ection of travel. The number of boxes (or arrangement of boxes) per spot shall be chosen in accordance with the area of a spot. 5.3.2.2.2 Arrangement of boxes for row application Fifty collecting boxes shall be placed successively in a row in the direction of travel. 5.3.2.2.3 Arrangement of boxes f
20、or band application Fifty collecting boxes (or a set of boxes) shall be placed suc- cessively in a row in the direction of travel. The width of the row shall match the width of the band. Test width, 3 m min. / / / / / / / /I / / / / / / / 2 / / / / / / / / / / / / / / Track I / / / / 2: lIIEca / / A
21、 2: II / / / / / 5: / / / / / / / 5: / / / / NOTE - To calculate n (see 7.2.1). boxes at crossings shall be counted twice. Figure 1 - Box arrangement for broadcast application 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical St
22、andards 1/9972545001 Not for Resale, 04/20/2007 02:46:44 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8624-1986 (E) 5.3.2.2.4 Arrangement of boxes for broadcast application 5.4.5.1 Flow rate test Two recordings lasting at least 15 s shall be made for each test. The c
23、ollecting boxes shall be set as shown in figure 1. The test width and length shall be at least 3 m. 5.4.5.2 Distribution test The distributor shall complete a single pass over the collection boxes at the set forward speed and application rate. The test office shall report the arrangement of the boxe
24、s. 5.4 Adjustment and measurement 5.4.1 Selection of feed mechanisms 5.4.6 Taking measurements The granules collected in each box (or set of boxes) shall be weighed. The flow and distribution tests shall be carried out simultaneously or successively. 5.4.2 Filling the hopper 6 Test procedure The tes
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