BS ISO BRITISH STANDARD 7507-3:2006 Petroleum and liguid petroleum products - Calibration of vertical cylindrical tanks - Part 3: Optical-triangulation method ICS 75.180.30 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO 7507-3:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 7507-3:2006. It supersedes BS 7723-3:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PTI/12, Petroleum measurement and sampling. A list of organizations represented on PTI/12 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsiblefor its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 31 January 2007 BSI 2007 ISBN9780580500633 BS ISO 7507-3:2006 ISO INTERNATIONAL STANDARD 7507-3 Second edition 2006-07-15 Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks - Part 3: Optical-triangulation method Petrole et produits petroliers liquides-Jaugeage des réservoirs cylindriques verticaux Partie 3:Methodepar triangulationoptique Reference number ISO 7507-3:2006(E) ii BSISO7507-3:2006 Contents Page Foreword. Introduction. 1 Scope... 2 Normativereferences 3 Terms and definitions. 4 Precautions.. 5 Equipment 5.1 Equipment for measurement of angles.. 5.2 Stadia ...... 6 Equipment set-upandprocedure 6.1 Preparation of tank ... 6.2 Establishmentofcalibrationconditions 6.3 Set-up of theodolites and/or total stations.. 3 7 Stadiaset-upandprocedure 8 Measurement of horizontal distance between twotheodolitestations using astadia.... 3 9 Measurement of horizontal distance between two theodolite stations using a total station ...... 5 10 Procedure for internal optical tank wall measurements..... 5 11 Procedures for external measurements 8 11.1 11.2 Reference circumferencemeasuredby strapping... 8 11.3 Referencedistances measured betweenpairsoftheodolitestations.. 10 12 11 12.1 Distances between theodolites... 11 12.2 Horizontal angles... 12.3 Reference circumference.... 11 13 Other measurements for tank calibrations .. 12 13.1 Tank-bottom calibrations. 12 13.2 Other measurements and data .... 12 14 Calculations anddevelopment oftank capacitytables.. 14.1 From the internal procedure..... 13 14.2 From the reference circumference procedure.... 14.3 From the referencedistances between pairs of theodolites. 13 14.4 Corrections... 13 14.5 Tank capacity table.... 13 AnnexA(normative)Computationof internal radiifrom internalmeasurements.. .14 Annex B (normative)Determination of the radius of the circle by the least-squares method..... Annex C(normative)Computation of internal radiifrom referencecircumference and external measurements...... AnnexD(normative)Computationof internal radii from referencedistancesbetweenpairsof theodolite stations....... 22 AnnexE(informative)Calibration uncertainties. .24 AnnexF (normative) Procedureforcheckingthe theodolite(s). .36 Bibliography. .38 ili BSISO7507-3:2006 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, 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