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BS-7570-se

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BS-7570-se
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  BSI BS*7570 92 1624669 0299598 2 BRITISH STANDARD Code of practice for Validation of arc w elding equipinent l\0 ('OJ'Yll\li ll\ ,\1'\Y FOii~ \\Tl'II<ll l' \\'lfflTE \ l'El1~llSSIOl\ fl10M llSl Copyright by the British Standards Institution ed Mar 3 9:22:52 1999 BS 757 : 1992 ST ND RDS  BS 757 : 1992 This British Standard, having been prepared under the direction of the Welding Standards Policy CommitteP, was published under the authority of the Standards Board and comes into effect on 15 July 1992 ©BS 1992 The following BS references relate to the work on this standard: Committee reference WEE/6 Draft for comment 91170593 DC ISBN 0 580 20713 7 BSI BS*7570 92 1624669 0299599 4 Ill Committees responsible for this ritish Standard The preparation of this British Standard was entrusted by the Welding Standards Policy Committee (WEE/-) to Technical Committee WEE/6, upon which the following bodies were represented: British Cable Makers Confederation Electricity Association Health and Safety Executive Institution of Incorporated l <~xecutive Engineers National Association of Arc Welding Equipment Repairers Power Generation Contractors' Association (BEAMA Ltd.) Welding Institute Welding Manufacturers' Association (BEAMA Ltd.) Coopted members Amendments issued since publication Amel. No. Date Text affected Copyright by the British Standards Institution ed Mar 03 09:24:03 1999  BSI BS 7570 92 1624669 0299600 7 BS 7570 : 1992 Contents Committees responsible Foreword Page Inside front cover 3 Code of practice 0 Introduction 1 2 3 4 Scope References Definitions Validation accuracies for the equipment classified as grade 1 standard grade) 5 Validation accuracies for the equipment classified as grade 2 precision grade) 5 1 Repeatability 5 2 Welding power sources 5. 3 Wire feed equipment 5 4 Instrumentation 6 Frequency of validation and calibration 7 Authorized validators of the welding equipment 8 Validation techniques 8 1 General 8.2 The validation of current controls and current meters 8.3 The validation of voltage controls and voltage meters 8.4 Validation of wire feed speed controllers and wire feed speed meters 8.5 The validation of welding power source special current control functions 9 Validation labels and certificates 9 1 Validation label 9.2 Invalidity label 9.3 Validation certificate Annexes A normative) Practical details for the application of this standard B informative) The validation of ancillary components in a welding system C normative) The validation of tungsten inert-gas welding equipment D normative) The use and construction of loading devices for welding 4 a u 6 6 7 8 8 8 8 8 8 g g g g 12 3 15 16 16 16 16 17 17 18 power sources 18 E normative) The validation of welding power source current controls and current meters 20 F normative) he validation of voltage controls and voltage meters on welding power sources 21 G normative) The validation of wire feeders 21 II normative) he validation of special current controls 22 Copyright by the British Standards Institution ed Mar 3 9:24: 4 1999 1  BS 757 : 1992 BSI BS 7570 92 1624669 0299601 9 Thbles Validation accuracies for grade 1 power sources 2 Validation accuracies for grade 1 instruments 3 Validation accuracies for grade 2 power sources 4 Validation accuracies for grade 2 wire feeders 5 Validation accuracies for grade 2 instrumentation 6 FTequency of validation 7 Loading devices for welding power sources 8 Current measming transducers 9 Current measuring instruments 10 Voltage measuring instruments Wire feed speed measming instruments 12 Waveform measuring devices 13 Wavefonn measuring device instrument types Figures Welding equipment validation aid chart 1 2 Welding equipment validation aid chart 2 3 Welding equipment validation aid chait 3 5 6 7 8 Illustration of waveform terminology Validation connections for current controls and current meters Validation connections for voltage controls and voltage meters Validation methods for wire feeders Validation connections for special current controls Page 7 7 8 8 8 8 1 1 13 13 15 22 23 24 25 26 7 28 29 3 List of references Inside back cover 2 Copyright by the British Standards Institution ed Mar 3 9:24: 4 1999

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