NTERNATIONAL STANDARD TSO 3963 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKIYHAPOIHA OPTAHI3ALWS HIO CTAHIAPTM3ALIWN ORGANISATION INTERNATIONALE DE NORMALISATION Fertilizers -- Sampling from a conveyor by stopping the belt Engrais --- Prelevement sur courroie transporteuse, par arret de la courroie First edition -- 1977-07-01 JUN 2 8 1977 Ansr Trternat Doa Seet ISO 3963-1977 (E) UDC 631.8 : 620.113 Ref. No. ISO 3963-1977 (E) Descriptors : fertilizers, manure, sampling. Price based on 2 pages Copyright International Organization for Standardization Not for Resale FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing International Standards is carried out through IsO technical committees. Every member body interested in a subject for which a technicai committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technicai committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard iSO 3963 was developed by Technical Committee ISO/TC 134, Fertilizers and soil conditioners, and was circulated to the member bodies in September 1975. It has been approved by the member bodies of the following countries : Portugal Austria India Brazil Iran Romania Czechoslovakia Israel South Africa, Rep. of Egypt, Arab Rep. of Italy Spain Finland Netherlands Thailand France New Zealand Turkey Germany Norway United Kingdom Hungary Potand Yugoslavia The member body of the following country expressed disapproval of the document on technical grounds : U.S.S.R. @ International Organization for Standardization, 1977 Printed in Switzerland Copyright International Organization for Standardization from IHS Notfor Res INTERNATIONAL STANDARD ISO 3963-1977 (E) Fertilizers -- Sampling from a conveyor by stopping the belt O INTRODUCTION 3 PRINCIPLE Taking a representative sample from a consignment of Stopping of the belt conveying the fertilizer. Insertion of fertilizer by sampling from a conveyor by stopping the belt two parallel boards or metal sheets vertically down into and is time consuming and interrupts the loading or unloading at right angles to the stream of fertilizer and to the axis of process considerably. The method shouid be used only the conveyor belt. Removal of the materiat between the where other methods, such as automatic sampling or scoop boards or sheets. sampling from a free fall, are impossible, or as a reference method to assess the accuracy of other techniques. 4 APPARATUS The procedure given applies to each increment to be taken to form' the final sample. The size of each increment, the Two parallel boards or metal sheets shaped to the number of increments or the frequency of sampling is characteristics of the trough of the belt, sufficiently long found by reference to IsO. . to project beyond the sides of the belt by 500 mm and sufficiently wide for the upper edge to be at least 50 mm above the top of the fertilizer on the belt. SAFETY It is recommended that a metal frame be made to carry The sampling method involves contact with machinery the boards or metal sheets. This frame can then be placed which is normally in motion. Safety precautions must be across the belt in a single operation. such that there is no possibility of the conveyor starting up while the increments are being taken. An override Failing this, two marks should be made on the supporting start/stop button should. be provided at the point of structure on each side of the belt so that the boards or samping. metal sheets can be inserted in the same ptaces each time. The sampler should be able to reach the whole cross- section of the belt without undue physical strain. The 5 PROCEDURE position