GB/T 28857-2025 English PDFUS$439.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 28857-2025: Differential transformer displacement transducer Status: Valid GB/T 28857: Historical versions
Basic dataStandard ID: GB/T 28857-2025 (GB/T28857-2025)Description (Translated English): Differential transformer displacement transducer Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N12 Classification of International Standard: 17.040 Word Count Estimation: 22,245 Date of Issue: 2025-08-01 Date of Implementation: 2026-02-01 Older Standard (superseded by this standard): GB/T 28857-2012 Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China GB/T 28857-2025: Differential transformer displacement transducer---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/GBT28857-2025ICS 17.040 CCSN12 National Standard of the People's Republic of China Replaces GB/T 28857-2012 Differential transformer displacement sensor Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Product Categories 2 4.1 Sensors are classified by power supply 2 4.2 Sensors are classified by structure 2 4.3 Sensors are classified according to their output signals 2 5 Basic Parameters 2 5.1 Measuring range 2 5.2 Accuracy Class 3 5.3 Power Supply 3 5.4 Operating Temperature 3 6 Technical Requirements 3 6.1 Appearance 3 6.2 Weight 3 6.3 Electrical Characteristics 3 6.4 Mechanical properties 4 6.5 Accuracy Index 5 6.6 Stability 5 6.7 Environmental Characteristics 6 7 Test methods 7 7.1 Test conditions 7 7.2 General provisions for testing 8 7.3 Appearance 8 7.4 Weight 8 7.5 Electrical Characteristics 8 7.6 Mechanical properties test 9 7.7 Tests related to accuracy 10 7.8 Tests related to stability 11 7.9 Environmental characteristics test method 12 8 Inspection Rules 13 8.1 Inspection categories 13 8.2 Factory Inspection 13 8.3 Type inspection 15 9 Logo, instruction manual 15 9.1 Sign 15 9.2 User Manual 15 10 Packaging, storage and transportation 16 10.1 Packaging 16 10.2 Storage 16 10.3 Transportation 16 Table 1 Typical range of sensor (moving distance) 2 Table 2 Technical indicators related to accuracy 5 Table 3 Technical indicators related to stability 6 Table 4 Electromagnetic compatibility test items 7 Table 5 Inspection items and inspection sequence Table 14 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 replaces GB/T 28857-2012 "DC differential transformer displacement sensor". Compared with GB/T 28857-2012, In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed to add “AC” differential transformer type displacement sensor (see Chapter 1, Chapter 1 of the.2012 edition); b) Added product categories (see 4.1); c) The measuring range of the sensor has been changed (see Table 1, Table 1 of the.2012 edition); d) Added AC power parameters (see 5.3.2); e) The operating temperature range of the sensor has been changed (see 5.4, 5.4 of the.2012 edition); f) Changed the range value requirements of mechanical stroke (see 6.4.3, 6.5.3 of the.2012 edition); g) Added technical requirements for lead wire strength (see 6.4.4); h) Modified the technical requirements for sensor ripple voltage (see 6.5.5, 6.6.5 of the.2012 edition); i) Added technical requirements for sensor harmonic voltage (see 6.5.6); j) Added technical requirements for temperature drift of the lower limit of the range (see 6.6.2); k) Added technical requirements for temperature drift of upper range limit (see 6.6.4); l) Add technical requirements for the protection level of the sensor housing to improve the dust and water resistance of the product (see 6.7.6); m) Added the electromagnetic compatibility technical requirements for sensors (see 6.7.7); n) Added the sensor lead wire strength test method (see 7.6.4); o) The ripple voltage test method has been changed (see 7.7.6, 7.7.5 of the.2012 edition); p) Added harmonic voltage test method (see 7.7.7); q) Added the lower range limit temperature drift test method (see 7.8.2); r) Added the upper range temperature drift test method (see 7.8.4); s) Added the test method for the protection level of the sensor housing (see 7.9.6). 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). The main drafting units of this document are. Shenyang Instrument Science Research Institute Co., Ltd., Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., Instrument and Meter Components Quality Inspection and Testing Center, Jiangsu Lianneng Electronic Technology Co., Ltd., China National Nuclear Corporation Automatic Instrument System Engineering Co., Ltd., China National Machinery Industry Corporation Sense Technology Co., Ltd. The main drafters of this document are. Li Yongqing, Xiao Honglian, Li Ting, Jiang Tongyu, Wu Ting, Zhang Chunguang, Peng Chunwen, Sun Yuxin, Shen Anan, Chen Gang, Zhang Kai, Qiao Jiayi, and Ma Jianwei. Previous versions of the documents replaced by this document. ---First published in.2012 as GB/T 28857-2012; ---This is the first revision. Differential transformer displacement sensor1 ScopeThis document specifies the product classification, basic parameters, technical requirements, inspection and Rules, marking, instructions for use, as well as packaging, storage and transportation, describe the test methods. This document applies to AC and DC differential transformer type displacement sensors.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. GB/T 2423.60-2008 Environmental testing for electric and electronic products Part 2.Test methods Test U. Terminals and overall installation Assembly strength GB/T 2829-2002 Periodic Inspection Attribute Sampling Procedures and Tables (Applicable to Inspection of Process Stability) GB/T 4208 Degrees of protection provided by enclosures (IP code) GB/T 7665 General terminology for sensors GB/T 9969 General principles for instructions for use of industrial products GB/T 13384 General technical requirements for packaging of electromechanical products GB/T 17626.2-2018 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test GB/T 17626.3-2023 Electromagnetic compatibility test and measurement techniques Part 3.Radio frequency electromagnetic field 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 test and measurement technology surge (shock) immunity test GB/T 25480-2010 Basic environmental conditions and test methods for transportation and storage of instruments and meters3 Terms and DefinitionsThe terms and definitions defined in GB/T 7665 and the following apply to this document. 3.1 Based on the working principle of transformer, it is a device powered by DC or AC power. It has one winding on the primary side and two windings on the secondary side. There is a movable iron core on the transformer opening. When the iron core is displaced, the magnetic circuit changes, so that the output differential voltage changes accordingly. Change. 3.2 A displacement sensor that uses the principle of differential transformer and outputs proportionally with the change in displacement. 3.3 A displacement sensor powered by a DC power supply and using the working principle of a differential transformer, which outputs proportionally as the displacement changes. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28857-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 28857-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 28857-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 28857-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
