GB/T 7724-2023 English PDFUS$589.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7724-2023: Electronic weighing indicator Status: Valid GB/T 7724: Historical versions
Basic dataStandard ID: GB/T 7724-2023 (GB/T7724-2023)Description (Translated English): Electronic weighing indicator Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N13 Classification of International Standard: 17.100 Word Count Estimation: 29,259 Date of Issue: 2023-11-27 Date of Implementation: 2024-06-01 Older Standard (superseded by this standard): GB/T 7724-2008 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 7724-2023: Electronic weighing indicator---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 17:100 CCSN13 National Standards of People's Republic of China Replace GB/T 7724-2008 Electronic weighing instrument Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms, symbols and abbreviations 1 3:1 Terms and definitions 1 3:2 Symbols and abbreviations 3 4 Classification and Coding 4 4:1 Instrument classification 4 4:2 Encoding method 4 5 Technical requirements 5 5:1 Measurement requirements 5 5:2 Appearance and structure 6 5:3 Functional requirements 6 5:4 Impact requirements 8 5:5 Anti-interference requirements 9 5:6 Electrical safety requirements 10 5:7 Additional requirements for instruments with specific functions11 6 Test methods 13 6:1 General test principles 13 6:2 Metrology performance test 14 6:3 Appearance and structural inspection15 6:4 Functional check 15 6:5 Influence test 17 6:6 Anti-interference test 17 6:7 Electrical safety test 18 6:8 Additional tests for instruments with specific functions 19 7 Inspection Rules 21 7:1 Factory inspection 21 7:2 Type inspection 21 8 Marking, packaging, transportation and storage22 8:1 Flag 22 8:2 Packaging 23 8:3 Transport23 8:4 Storage 23 Reference 24 Figure 1 AC leakage current equivalent test circuit 19 Figure 2 IoT functional test equipment link diagram 20 Table 1 Symbols and abbreviations 3 Table 2 Instrument type code 4 Table 3 Relationship between accuracy level and calibration scale 5 Table 4 Maximum allowable error of the instrument 5 Table 5 Test parameter settings 14 Table 6 Factory inspection and type inspection items 21ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 7724-2008 "Electronic Weighing Instruments": Compared with GB/T 7724-2008, except for structural adjustment and editing In addition to the modifications, the main technical changes are as follows: ---Deleted the digital junction box, AD module, digital weight transmitter, data storage device, sales terminal, and large-screen display and terms and definitions of multi-channel input (see 3:1:2, 3:1:3, 3:1:4, 3:1:6, 3:1:7, 3:1:8, 3:1:9 of the:2008 version); ---Added terms and definitions for digital weighing indicators, multi-channel weighing instruments, Internet of Things weighing instruments, and wireless weighing instruments (see 3:1:7, 3:1:9, 3:1:10, 3:1:11); ---Added symbols and abbreviations (see 3:3); ---Added classification and coding (see Chapter 4); ---The classification of weighing instrument classes has been changed, and the requirements for ○Ⅰ and ○Ⅱ have been deleted (see 5:1:1, 5:1:2, 5:2 of the:2008 edition); ---Added appearance requirements and appearance inspection (see 5:2, 6:3); ---Changed the protection capability requirements (see 5:2:3, 6:1:1:1 of the:2008 version); ---Deleted the packaging protection capability requirements (see 6:15 of the:2008 version); ---Added interface requirements and interface checks (see 5:3:6, 6:4:6); ---Changed the sensor excitation feedback requirements (see 5:4:1:3, 5:12:3 and 5:12:4 of the:2008 version); ---Changed the anti-interference requirements (see 5:5, 5:8 of the:2008 version); ---Changed the requirements for multi-channel instruments (see 5:7:3, 5:5 and 6:8 of the:2008 version); --- Added requirements and test methods for Internet of Things weighing instruments and wireless weighing instruments (see 5:7 and 6:8); --- Add the method for determining the calibration graduation value eind (see 6:1:3); ---Changed the protection capability and electrical safety test methods (see 6:3:3, 6:7, 7:7, 7:9 of the:2008 edition); ---Added additional tests for specific functional instruments (see 6:8); ---The inspection items and judgment rules for factory inspection and type inspection have been changed (see Table 6, Table 9 and Table 10 of the:2008 version); --- Added requirements for the main parameters of the sign (see 8:1:2): Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by China Light Industry Federation: This document is under the jurisdiction of the National Technical Committee for Standardization of Weighing Instruments (SAC/TC97): This document was drafted by: Shanghai Yaohua Weighing System Co:, Ltd:, Shandong Institute of Metrology, Shandong Jinzhong Technology Group Co:, Ltd: Co:, Ltd:, Qingdao Metrology Technology Research Institute, Mettler-Toledo (Changzhou) Measurement Technology Co:, Ltd: The main drafters of this document: Wang Wei, Zhang Hongshe, Lu Xinguang, Wang Wei, Wang Junguo, and Tan Jianpeng: The previous releases of this document and the standard documents it replaces are as follows: ---GB 7724-1987; ---GB/T 7724-1999; ---GB/T 7724-2008; ---This is the third revision: Electronic weighing instrument1 ScopeThis document specifies the technical requirements, measurement requirements, inspection rules and marking, packaging, transportation, Storage and other requirements, define terms and definitions, classification and coding, and describe test methods: This document applies to medium-accuracy and ordinary-accuracy electronic weighing instruments used in non-automatic weighing instruments:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 191 Packaging, storage and transportation pictorial mark GB/T 4208-2017 Shell protection level (IP code) GB 4793:1-2007 Safety requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements GB/T 6388 Transportation packaging receipt and delivery marks GB/T 13384 General technical conditions for mechanical and electrical product packaging GB/T 14250 Weighing instrument terminology GB/T 15479 Technical requirements and test methods for insulation resistance and insulation strength of industrial automation instruments GB/T 17626:2-2018 Electromagnetic compatibility testing and measurement technology electrostatic discharge immunity test GB/T 17626:3-2016 Electromagnetic compatibility testing and measurement technology Radio frequency electromagnetic field radiation immunity test GB/T 17626:4-2018 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test GB/T 17626:5-2019 Electromagnetic compatibility testing and measurement technology surge (impact) immunity test GB/T 17626:6-2017 Electromagnetic compatibility test and measurement technology Conducted disturbance immunity induced by radio frequency fields GB/T 17626:11-2008 Electromagnetic compatibility test and measurement technology Immunity to voltage dips, short interruptions and voltage changes test GB/T 23111-2008 Non-automatic weighing instruments GB/T 36478 (all parts) Internet of Things information exchange and sharing 3 Terms, symbols and abbreviations 3:1 Terms and definitions The following terms and definitions as defined in GB/T 23111-2008 and GB/T 14250 apply to this document: 3:1:1 Structure 3:1:1:1 A general name for the following electronic devices that can be used as weighing instrument modules: ---Weighing indicator; 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