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JJF 2075-2023 English PDF

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JJF 2075-2023: Calibration Specification for International Rubber Hardness Degrees Testers(Scales N, H, L)
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JJF 2075-2023English449 Add to Cart 4 days [Need to translate] Calibration Specification for International Rubber Hardness Degrees Testers(Scales N, H, L) Valid JJF 2075-2023

Standard similar to JJF 2075-2023

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Basic data

Standard ID JJF 2075-2023 (JJF2075-2023)
Description (Translated English) Calibration Specification for International Rubber Hardness Degrees Testers(Scales N, H, L)
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 22,295
Date of Issue 2023-10-12
Date of Implementation 2024-04-12
Issuing agency(ies) State Administration for Market Regulation

JJF 2075-2023: Calibration Specification for International Rubber Hardness Degrees Testers(Scales N, H, L)


---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.
National Metrology Technical Specifications of the People's Republic of China Rubber international hardness tester (N, H, L scale) Calibration specifications (ScalesN,H,L) Released on 2023-10-12 Implemented on 2024-04-12 Released by the State Administration for Market Regulation Rubber International Hardness Tester (N, H, L scale) calibration specifications (ScalesN,H,L) Replaces JJG666-1990 Text part Responsible unit: National Technical Committee for Force, Hardness and Gravity Measurement Main drafting unit: Guangdong Institute of Metrology Kunshan Innovation Technology Testing Instrument Co:, Ltd: Participating unit in the drafting: AVIC Beijing Great Wall Measurement and Testing Technology Research Institute This specification is entrusted to the National Force, Hardness and Gravity Measurement Technical Committee to be responsible for interpretation: The main drafters of this specification: Chen Minghua (Guangdong Institute of Metrology) He Guanglin (Guangdong Institute of Metrology) Wu Xianglei (Guangdong Institute of Metrology) Tao Zecheng (Kunshan Innovation Technology Testing Instrument Co:, Ltd:) Participating drafters: Shi Wei (AVIC Beijing Great Wall Measurement and Testing Technology Research Institute)

Table of contents

Introduction(Ⅱ) 1 Scope(1) 2 Cited documents(1) 3 Overview(1) 4 Metering characteristics(1) 4:1 Pressure foot(1) 4:2 Pressure head(2) 4:3 Test force(2) 4:4 Measurement indicating mechanism(2) 4:5 Indication error and indication repeatability (2) 5 Calibration conditions(2) 5:1 Environmental conditions(2) 5:2 Calibration equipment(3) 6 Calibration items and calibration methods (3) 6:1 Calibration items (3) 6:2 Check before calibration(3) 6:3 Calibration of the presser foot(4) 6:4 Calibration of indenter(4) 6:5 Calibration of test force(5) 6:6 Calibration of measuring indicating mechanism(5) 6:7 Calibration of indication error and indication repeatability (6) 7 Calibration result expression(6) 8 Recalibration time interval(6) Appendix A Conversion relationship between the penetration depth difference D value of the rubber international hardness tester and IRHD (7) Appendix B Rubber International Hardness Tester Calibration Record Format (9) Appendix C Internal page format of rubber international hardness tester calibration certificate (11) Appendix D Uncertainty Assessment Method and Examples of Calibration Results of Rubber International Hardness Tester (13)

Introduction

JJF 1001-2011 "General Measurement Terms and Definitions", JJF 1071-2010 "Compilation of National Measurement Calibration Specifications" Rules" and JJF 1059:1-2012 "Evaluation and Expression of Measurement Uncertainty" jointly form the basis for revising this specification Series specifications: During the revision process of this specification, full consideration has been given to GB/T 23651-2009 "Vulcanized rubber or thermoplastic rubber hard "Introduction and Guide to Hardness Testing", GB/T 6031-2017 "Determination of Hardness of Vulcanized Rubber or Thermoplastic Rubber (10IRHD~100IRHD)", GB/T 39693:9-2021 "Measurement of hardness of vulcanized rubber or thermoplastic rubber Part 9: Calibration and verification of durometers", ISO 48-1:2018 "Vulcanized rubber or thermoplastic rubber hardness Determination of hardness of plastic rubber Part 2: Hardness range 10IRHD~100IRHD》(Rubber, vulcan- and100IRHD), ISO 48-9:2018 "Determination of hardness of vulcanized rubber or thermoplastic rubber Part 9: and definitions, as well as related technical requirements, technical indicators and inspection methods: This specification gives the international hardness tester for rubber Specific calibration conditions, calibration items and calibration methods for the measurement characteristics of (N, H, L scales): This specification replaces JJG666-1990 "International Fixed Load Rubber Hardness Tester": Compared with JJG666-1990, this The main technical changes in the specification are as follows: ---Convert verification procedures into calibration specifications; ---Appendix 1 of the original regulations for the International Rubber Hardness (IRHD) standard block was independently revised to JJF 2074-2023 "Standard Quasi-rubber international hardness block (N, H, L scale) calibration specifications"; ---Clear the scope of application of this specification to three scales: N, H, and L; ---Cancel the verticality requirement of the hardness tester spindle on the sample support table; ---Cancel the noise requirements generated by the vibration mechanism of the hardness tester; ---The repeatability of the hardness tester indication value is changed to 1:5IRHD: The release status of previous versions of this specification is as follows: ---JJG666-1990: Rubber international hardness tester (N, H, L scale) Calibration specifications

1 Scope

This specification applies to the calibration of rubber international hardness testers (N, H, L scales):

2 cited documents

This specification references the following documents: GB/T 7220 Product Geometric Specification (GPS) Surface Structure Profile Method Surface Roughness Terminology Parameter measurement GB/T 4340:1 Vickers hardness test of metallic materials Part 1: Test methods For dated references, only the dated version applies to this specification; for undated references, only the dated edition applies: The latest version (including all modification orders) shall apply to this specification:

3 Overview

The international hardness of rubber is measured by measuring a steel ball indenter of a certain diameter under a small contact test force and a main test force: The depth difference pressed into the rubber under the final action is converted into the International Rubber Hardness Unit (IRHD) and indicated: The difference between N, H and L scales lies in the diameter of the steel ball indenter and the size of the test force: Choose the appropriate one according to the specific use: appropriate scale: The applicable range of each scale is shown in Figure 1: Figure 1 Applicable scope of hardness scale X-hardness (IRHD); aL scale; bN scale; cH scale N scale: routine hardness test: It is suitable for rubber hardness in the range of (35~85) IRHD, and can also be used for hard Rubber with a temperature in the range of (30~95) IRHD: H scale: high hardness test: Suitable for rubber hardness in the range of (85~100) IRHD: L scale: low hardness test: Suitable for rubber hardness in the range of (10~35) IRHD: 4 Measuring characteristics ① ① The technical indicators given in the measurement characteristics article are not used for qualification determination and are for reference only: 4:1 Pressure foot 4:1:1 The geometric index requirements of the pressure foot are shown in Table 1:

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