GB/T 20919-2018 English PDF

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GB/T 20919-2018: External micrometer with electronic digital display
Status: Valid

GB/T 20919: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20919-2018	219	Add to Cart	3 days	External micrometer with electronic digital display	Valid
GB/T 20919-2007	479	Add to Cart	3 days	External micrometer with electronic digital display	Obsolete

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Basic data

Standard ID: GB/T 20919-2018 (GB/T20919-2018)
Description (Translated English): External micrometer with electronic digital display
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J42
Classification of International Standard: 17.040.30
Word Count Estimation: 11,151
Date of Issue: 2018-05-14
Date of Implementation: 2018-12-01
Older Standard (superseded by this standard): GB/T 20919-2007
Regulation (derived from): National Standards Announcement No. 6 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 20919-2018: External micrometer with electronic digital display

---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.
External micrometer with electronic digital display ICS 17.040.30 J42 National Standards of People's Republic of China Replacing GB/T 20919-2007 Electronic digital outer diameter micrometer Published on.2018-05-14 2018-12-01 Implementation National Market Supervision Administration China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20919-2007 "Electronic Digital External Micrometer". This standard is compared with GB/T 20919-2007 except that In addition to the editorial changes, the main technical changes are as follows. --- Expand the measurement range of the digital micrometer outer diameter micrometer to 1000mm (see Chapter 1, Chapter 1 of the.2007 edition); --- Modify the definition of the digital display micrometer digital display device (see 3.1,.2007 version 3.1); --- Increased the definition of the electronic digital outer diameter micrometer (see 3.2); --- Increased the digital micrometer outer diameter micrometer with a micrometer screw pitch of 2mm (see 4.2.1); --- Increased the electronic digital display micrometer with a range equal to 50mm and its maximum allowable error (see 4.2.2, 5.11); --- Increased the number of digital anodometer micrometer (see Figure 2); --- Increased the number of adjustable anvil electronic digital micrometer outside diameter (see Figure 3); --- Increased requirements for scale marking (see 5.9); --- Revised the requirements and specified values of the maximum permissible error of the indication (see 5.11 and Table 1, 5.9 and Table 1 of the.2007 edition); --- Modified the indexing error checking method Note 2 (see 6.7.1,.2007 version 6.5.1); --- Increased the test method for measuring the deviation of the measuring surface (see 6.6); --- Modify the value of the offset error of the measuring surface (see 6.6 and Table 2, Appendix C of the.2007 edition); --- Added size B series inspection quantity blocks for the maximum allowable error test method for indicating value (see 6.8 and Table 3,.2007 version 6.6 and Table 2); --- Increased the maximum allowable error of the electronic digital display outer diameter micrometer with a range equal to 50mm to check the mass (see 6.8 and table 3); --- Modified the test method for the maximum allowable error of the indication (see 6.8.1, version 6.6.1 of the.2007 edition); --- Move the contents of Appendix A to Appendix G to the text (see Appendix A to Appendix G of the.2007 edition); --- Removed the provision of scores for angle sensors (see version 5.8.3 of the.2007 edition). This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Standardization Technical Committee for Measuring Instruments (SAC/TC132). This standard is drafted by. Suzhou Micron Measurement Technology Co., Ltd. Participated in the drafting of this standard. Chengdu Tool Research Institute Co., Ltd., Chengdu Chengliang Tools Group Co., Ltd., Guilin Measuring Tools Limited Responsible company, Harbin Measuring & Cutting Tools Group Co., Ltd., Dongguan Tema Electronics Co., Ltd., Guilin Guanglu Digital Measurement & Control Co., Ltd., National Quality Supervision and Inspection Center for Measuring Instruments, Measurement and Inspection Institute of Guangxi Zhuang Autonomous Region and Liaoning Institute of Metrology Science. The main drafters of this standard. Huang Xiaobin, Wang Ronghua, Xu Gang, Dai Chao, Zhao Weirong, Zhang Wei, Wang Zhaojin, Dong Zhongxin, Liu Wenbin, Su Wingxiong, Ding Wen. The previous versions of the standards replaced by this standard are. --- GB/T 20919-2007. Electronic digital outer diameter micrometer

1 Scope

This standard specifies the terms and definitions of electronic digital external micrometer, type and basic parameters, requirements, inspection methods, test methods, and targets. Aspiration and packaging. This standard applies to the resolution of 0.001mm, the range is less than or equal to 50mm, the upper limit of the measurement range to 1000mm of the number of electrons Significant outside diameter micrometer (hereinafter referred to as "electronic digital micrometer").

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1216-2018 outside diameter micrometer GB/T 2423.3-2016 Environmental testing - Part 2. Test method test Cab. Constant damp heat test GB/T 2423.22-2012 Environmental tests Part 2. Test methods Test N. Temperature changes GB/T 4208-2017 shell protection grade (IP code) GB/T 1800.2-2009 Geometrical Product Specifications (GPS) Limits and fits - Part 2. Standard tolerance classes and holes, axes Limit deviation table GB/T 17163-2008 Geometrical measuring instrument terminology basic terminology GB/T 17164-2008 Geometrical measuring instrument terminology Product terminology GB/T 17626.2-2006 Electromagnetic compatibility test and measurement techniques Electrostatic discharge immunity test GB/T 17626.3-2016 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test GB/T 24634-2009 Geometrical Product Specifications (GPS) General concepts and requirements for GPS measurement equipment

3 Terms and Definitions

The definitions of GB/T 17163-2008, GB/T 17164-2008 and GB/T 24634-2009 and the following terms and definitions apply In this document. 3.1 Electronic digital micrometer digital display device electronicdigitalindicatingdevicesformicrometer The use of sensors, electronic and digital display technology to calculate and display the micrometer screw displacement device of the electronic digital micrometer. Note. Hereinafter referred to as "electronic digital display device." 3.2 An external size measuring instrument that measures the reading of the distance between two measuring surfaces of a ruler using an electronic digital display device. Note. Rewrite GB/T 17164-2008, definition 2.3.5. ......

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