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GB/T 7724-2023 English PDF

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GB/T 7724-2023: Electronic weighing indicator
Status: Valid

GB/T 7724: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 7724-2023589 Add to Cart 5 days Electronic weighing indicator Valid
GB/T 7724-20081039 Add to Cart 5 days Electronic weighing meter Obsolete
GB/T 7724-1999719 Add to Cart 5 days Weighting indication controller Obsolete
GB/T 7724-1987RFQ ASK 3 days Basic specification for weighting indication controller Obsolete

Similar standards

GB/T 9081   GB/T 21296.2   GB/T 21296.3   GB/T 7722   GB/T 7721   

Basic data

Standard 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Older Standard (superseded by this standard): GB/T 7724-2008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 contents

Preface 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 21

Foreword

This 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 instrument

1 Scope

This 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 documents

The 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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