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JJF 1890-2021 English PDF

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US$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1890-2021: Calibration Specification for Straightness Measuring Devices
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1890-2021	299	Add to Cart	3 days	Calibration Specification for Straightness Measuring Devices	Valid

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Basic data

Standard ID: JJF 1890-2021 (JJF1890-2021)
Description (Translated English): Calibration Specification for Straightness Measuring Devices
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Word Count Estimation: 13,138
Issuing agency(ies): State Administration for Market Regulation

JJF 1890-2021: Calibration Specification for Straightness Measuring Devices

---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.
Calibration Specification for Straightness Measuring Devices National Metrology Technical Specifications of the People's Republic of China Calibration specification for straightness measuring instrument Released on 2021-02-23 2021-08-23 implementation Issued by the State Administration for Market Regulation Calibration specification for straightness measuring instrument MeasuringDevice Central unit. National Technical Committee on Geometrical Length Measurement Main drafting unit. Jiangsu Institute of Metrology Shandong Institute of Metrology China Institute of Metrology Liuzhou Kelu Measuring Instrument Co., Ltd. Participated in the drafting. Chongqing Institute of Metrology and Quality Inspection Qingdao Institute of Metrology Qingdao Qianshao Precision Instrument Co., Ltd. This specification entrusts the National Technical Committee of Geometrical Length Measurement to be responsible for the interpretation The main drafters of this specification. Xiaofei Wang (Jiangsu Institute of Metrology) Zhao Dongsheng (Shandong Institute of Metrology) Wang Weinong (China Institute of Metrology) Gu Xiaoling (Liuzhou Kelu Measuring Instrument Co., Ltd.) Participating drafters. Xu Jian (Chongqing Institute of Metrology and Quality Inspection) Chen Jun (Jiangsu Institute of Metrology) Wang Zhaomeng (Qingdao Institute of Metrology) Cui Zhaoxia (Qingdao Qianshao Precision Instrument Co., Ltd.)

Introduction (Ⅱ) 1 Scope (1) 2 Reference documents (1) 3 Overview (1) 4 Measurement characteristics (2) 4.1 Error of micrometer indication value (2) 4.2 Straightness error (2) 4.3 Measurement repeatability (2) 5 Calibration conditions (2) 5.1 Environmental conditions (2) 5.2 Calibration items and calibration standards (2) 6 Calibration items and calibration methods (2) 6.1 Error of micrometer indication value (3) 6.2 Straightness error (3) 6.3 Measurement repeatability (3) 7 Expression of calibration results (3) 8 Recalibration interval (3) Appendix A. Example of segmented reconstruction data processing (4) Appendix B Example of Uncertainty Evaluation of Straightness Error Measurement Results of Straightness Measuring Instrument (6) Appendix C Contents of Calibration Certificate (8)

Introduction

JJF 1071 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001 "General Metrology Terms and Definitions" and JJF 1059.1 "Evaluation and Expression of Measurement Uncertainty" together constitutes a basic series that supports the formulation of this specification specification. In the process of formulating this specification, refer to GB/T 11336-2004 "Straightness Error Detection", JB/T 11501- 2013 "Air Floating Straightness Measuring Instrument". This specification is released for the first time. Calibration specification for straightness measuring instrument

1 Scope

This specification applies to the calibration of straightness measuring instruments.

2 Reference documents

The following documents are cited in this specification. GB/T 11336-2004 Straightness error detection JB/T 11501-2013 Air-floating straightness measuring instrument For dated reference documents, only the dated version applies to this specification; for all undated references The latest version (including all amendments) is applicable to this specification.

3 overview

The straightness measuring instrument is composed of a precision guide rail, a sliding seat and a micrometer indicator (instrument) (hereinafter referred to as a micrometer), etc. When the sliding seat moves, the probe of the micrometer is in contact with the surface of the test piece, and the straightness error of the surface of the test piece is measured. its The main types are air-floating type and sliding type. The schematic diagrams are shown in Figure 1 and Figure 2 respectively. Figure 1 Schematic diagram of air-floating straightness measuring instrument 1- rail; 2- column; 3- cross arm; 4- micrometer; 5- air-floating sliding seat ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1890-2021_English be delivered?

Answer: Upon your order, we will start to translate JJF 1890-2021_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 JJF 1890-2021_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1890-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.