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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 18268.21-2025: Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 21: Particular requirements - Test configurations, operational conditions and performance criteria for sensitive test and measurement equipment for EMC unprotected applic Status: Valid GB/T 18268.21: Historical versions
Basic dataStandard ID: GB/T 18268.21-2025 (GB/T18268.21-2025)Description (Translated English): Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 21: Particular requirements - Test configurations, operational conditions and performance criteria for sensitive test and measurement equipment for EMC unprotected applic Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N10 Classification of International Standard: 17.220.20; 25.040.40; 33.100.20 Word Count Estimation: 14,133 Date of Issue: 2025-08-29 Date of Implementation: 2027-09-01 Older Standard (superseded by this standard): GB/T 18268.21-2010 Issuing agency(ies): State Administration for Market Regulation, National Standardization Administration GB/T 18268.21-2025: Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 21: Particular requirements - Test configurations, operational conditions and performance criteria for sensitive test and measurement equipment for EMC unprotected applic---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18268.21-2025 ICS 17.220.20;25.040.40;33.100.20 CCSN10 National Standard of the People's Republic of China Replaces GB/T 18268.21-2010 Electromagnetic compatibility of electrical equipment for measurement, control and laboratory use Capacitive requirements Part 21.Special requirements for electromagnetic Compatible with sensitive testing and measuring equipment for protective applications Test configuration, working conditions and performance criteria Released on August 29, 2025, implemented on September 1, 2027 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General 1 5 Electromagnetic compatibility test plan 1 5.1 General 1 5.2 Configuration of the equipment under test (EUT) during the test 2 5.3 EUT operating conditions during the test 2 5.4 Functional Characteristics Specification 2 5.5 Test description 3 6 Immunity Requirements 3 6.1 Test conditions 3 6.2 Immunity test requirements 3 6.3 Accidental Aspects 3 6.4 Performance Criteria 3 7 Launch Requirements 3 8 Test results and test reports 3 9 Instructions for Use 3 Appendix A (Normative) Immunity test requirements for portable test and measuring equipment powered by batteries or circuits under test 4 Appendix B (Informative) Guidelines for Electromagnetic Compatibility Analysis and Evaluation 5 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 21 of GB/T 18268 "Electromagnetic compatibility requirements for electrical equipment for measurement, control, and laboratory use". GB/T 18268 has published the following parts. --- Part 1.General requirements; --- Part 21.Special requirements for test configuration and working conditions of sensitivity test and measurement equipment for applications without electromagnetic compatibility protection and performance criteria; --- Part 22.Particular requirements Test configuration, operating conditions and requirements for portable test, measuring and monitoring equipment for low-voltage distribution systems Performance criteria; --- Part 23.Special requirements for test configurations, operating conditions and performance criteria for transmitters with integrated or remote signal conditioning; --- Part 24.Particular requirements for insulation monitoring devices in accordance with IEC 61557-8 and insulation fault determination devices in accordance with IEC 61557-9 Test configuration, operating conditions and performance criteria of the equipment; --- Part 25.Special requirements for test configuration, operating conditions and performance of field devices with interfaces conforming to IEC 61784-1, CP3/2 Ability to judge; --- Part 26.Particular requirements for in vitro diagnostic (IVD) medical devices; --- Part 31.Immunity requirements for safety-related systems and equipment intended to perform safety-related functions (functional safety) General industry application; --- Part 32.Immunity requirements for safety-related systems and equipment intended to perform safety-related functions (functional safety) Specific electromagnetic Industrial applications of the environment. This document replaces GB/T 18268.21-2010 "Electromagnetic compatibility requirements for electrical equipment for measurement, control and laboratory use Part 21 Part 3.Special requirements for test configuration, working conditions and performance criteria of sensitivity test and measurement equipment for occasions without electromagnetic compatibility protection. Compared with GB/T 18268.21-2010, the main technical changes are as follows. --- Added immunity test requirements for portable test and measuring equipment powered by batteries or circuits under test (see Appendix A); --- Added electromagnetic compatibility analysis and evaluation guide (see Appendix B). This document is equivalent to IEC 61326-2-1.2020 "Electromagnetic compatibility requirements for electrical equipment for measurement, control, and laboratory use Part 2-1 Part 1.Special requirements for test configuration, working conditions and performance criteria of sensitivity test and measurement equipment for situations without electromagnetic compatibility protection. The following minimal editorial changes have been made to this document. --- In order to coordinate with the existing standards, the name of the standard was changed to "Electromagnetic compatibility requirements for electrical equipment for measurement, control and laboratory use" Part 21.Special requirements - Test configuration and working conditions of sensitivity test and measurement equipment for applications without electromagnetic compatibility protection and performance criteria". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Industrial Process Measurement, Control and Automation (SAC/TC124). This document was drafted by. Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., Shanghai Instrument and Control System Inspection and Testing Co., Ltd. Co., Ltd., Shanghai INESA Artificial Intelligence Innovation Institute Co., Ltd., Chongqing Jinshan Medical Robot Co., Ltd., SNPTC Automatic Instrument System Engineering Co., Ltd., Chongqing Chuanyi Automation Co., Ltd., Chongqing Kairui Certification Service Co., Ltd., Shanghai Institute of Metrology and Testing Technology, Siyuan Electric Co., Ltd. Co., Ltd., China Electronics Technology Standardization Institute. The main drafters of this document are. Yu Lei, Sun Yuxin, Wang Ying, Huang Yu, Wu Ting, Xiao Honglian, Zhang Aisen, Zou Mingwei, Sun Tianfei, Zhou Pengcheng, Kim Sun-ik, Liu Long, Qiao Jiayi, Fei Jie, Tang Huajun, and Cui Qiang. The previous versions of this document and the documents it replaces are as follows. ---First published in.2010 as GB/T 18268.21-2010; ---This is the first revision.introductionThe proposed standard GB/T 18268 "Electromagnetic compatibility requirements for electrical equipment for measurement, control and laboratory use" consists of 9 parts. --- Part 1.General requirements. The purpose is to specify the electromagnetic requirements of electrical equipment for professional, industrial process, industrial manufacturing and educational use Compatibility immunity and emission requirements, these electrical devices are powered by less than AC 1000V or DC 1500V power supply or battery, Or powered by the line under test, including equipment and computing devices used in industrial and non-industrial locations. --- Part 21.Special requirements for test configuration and working conditions of sensitivity test and measurement equipment for applications without electromagnetic compatibility protection The purpose is to specify in more detail the equipment with test and measurement circuits (internal and (or) external circuits of the equipment) The test configuration, working conditions and performance criteria of these devices are specified by the manufacturer for operational and/or functional reasons. No EMC protection. --- Part 22.Particular requirements Test configuration, operating conditions and performance of portable test, measuring and monitoring equipment for low-voltage distribution systems The purpose is to specify in more detail the test, measurement or monitoring equipment of low voltage distribution system protection facilities, which consists of batteries and (or) Test configuration, operating conditions and performance criteria for equipment powered by the tested circuit and portable equipment. This document is consistent with GB/T 18268.1 Use in conjunction. --- Part 23.Special requirements for test configurations, operating conditions and performance criteria for transmitters with integrated or remote signal conditioning. The purpose is to define in more detail the conversion function, which is characterized by the conversion of non-electrical quantities into process-related quantities with the help of auxiliary energy. The test configuration and working principle of the transmitter for measuring electrochemical quantity and biomass are provided. Conditions and performance criteria. --- Part 24.Particular requirements for insulation monitoring devices in accordance with IEC 61557-8 and insulation fault determination devices in accordance with IEC 61557-9 The purpose is to provide more detailed provisions for the test configuration, operating conditions and performance criteria of the equipment in accordance with IEC 61557-8. Test configuration, operating conditions and performance criteria for monitoring devices and insulation fault location equipment according to IEC 61557-9. --- Part 25.Special requirements for test configuration, operating conditions and performance of field devices with interfaces conforming to IEC 61784-1, CP3/2 The purpose is to discuss the special requirements of electromagnetic compatibility testing of field devices for interfaces that meet IEC 61784-1, CP3/2. --- Part 26.Particular requirements for in vitro diagnostic (IVD) medical devices. The purpose is to Electromagnetic environment, specifies the basic requirements for its electromagnetic compatibility, immunity and emission. This document is coordinated with GB/T 18268.1 use. --- Part 31.Immunity requirements for safety-related systems and equipment intended to perform safety-related functions (functional safety) General industry Application. The purpose is to specify the expected performance of SIL1 to SIL3 in IEC 61508 in the electromagnetic environment of indoor and outdoor industrial sites. Immunity requirements for industrial systems and equipment for safety functions. --- Part 32.Immunity requirements for safety-related systems and equipment intended to perform safety-related functions (functional safety) Specific electromagnetic The purpose is to specify the specific electromagnetic environment obtained by applying mitigation measures in indoor and outdoor industrial locations. Under the IEC 61508 SIL1 to SIL3, the systems and equipment used in industrial applications that are intended to perform safety functions are immune to disturbances. Degree requirements. This document is used in conjunction with GB/T 18268.1. Electromagnetic compatibility of electrical equipment for measurement, control and laboratory use Capacitive requirements Part 21.Special requirements for electromagnetic Compatible with sensitive testing and measuring equipment for protective applications Test configuration, working conditions and performance criteria1 ScopeIn addition to the requirements of GB/T 18268.1-2025, this document specifies in more detail the requirements for test and measurement circuits [internal and external (or) external circuits] of the equipment. These equipment shall be tested for the following conditions. There is no electromagnetic compatibility protection due to the failure of the circuit. The manufacturer needs to specify the intended use environment of the equipment and select the applicable test level from GB/T 18268.1-2025. Note. Such equipment includes but is not limited to oscilloscopes, logic analyzers, spectrum analyzers, network analyzers, analog meters, digital multimeters, and circuit board testers. system.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. Except for the following contents, the normative references in Chapter 2 of GB/T 18268.1-2025 apply to this document. Supplement. GB/T 18268.1-2025 Electromagnetic compatibility requirements for electrical equipment for measurement, control, and laboratory use Part 1.General requirements (IEC 61326-1.2020, IDT) Note. GB/T 4365-2024 Electrical terminology - Electromagnetic compatibility (IEC 60050-161.2021, MOD)3 Terms and DefinitionsThe terms and definitions defined in GB/T 18268.1-2025 and IEC 60050-161 apply to this document. The URLs for terminology databases used for standardization maintained by ISO and IEC are as follows.4 GeneralChapter 4 of GB/T 18268.1-2025 applies to this document.5 Electromagnetic compatibility test plan5.1 General Subsection 5.1 of GB/T 18268.1-2025 applies to this document. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 18268.21-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 18268.21-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 18268.21-2025_English with my colleagues?Answer: Yes. 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