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JJF 2074-2023 English PDF

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US$289.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 2074-2023: Calibration Specification for International Rubber Hardness Degrees Reference Blocks(Scales N, H, L)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 2074-2023	289	Add to Cart	3 days	Calibration Specification for International Rubber Hardness Degrees Reference Blocks(Scales N, H, L)	Valid

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Basic data

Standard ID: JJF 2074-2023 (JJF2074-2023)
Description (Translated English): Calibration Specification for International Rubber Hardness Degrees Reference Blocks(Scales N, H, L)
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 14,171
Date of Issue: 2023-10-12
Date of Implementation: 2024-04-12
Issuing agency(ies): State Administration for Market Regulation

JJF 2074-2023: Calibration Specification for International Rubber Hardness Degrees Reference Blocks(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 Standard rubber international hardness block (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 Standard rubber international hardness block (N, H, L scale) calibration specifications (ScalesN,H,L) Replaces JJG666-1990 Appendix 1 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: Wu Xianglei (Guangdong Institute of Metrology) Chen Minghua (Guangdong Institute of Metrology) He Guanglin (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)

Introduction(Ⅱ) 1 Scope(1) 2 Cited documents(1) 3 Overview(1) 4 Metering characteristics(1) 4:1 Standard block geometry(1) 4:2 Standard block flatness(2) 4:3 Standard block uniformity (2) 4:4 Stability of standard blocks(2) 5 Calibration conditions(2) 5:1 Environmental conditions(2) 5:2 Calibration device(2) 6 Calibration items and calibration methods (2) 6:1 Calibration items(2) 6:2 Check before calibration(3) 6:3 Calibration of dimensions(3) 6:4 Calibration of flatness (3) 6:5 Calibration of hardness values (3) 6:6 Uniformity(3) 6:7 Stability(3) 7 Calibration result expression(3) 8 Recalibration time interval (4) Appendix A Standard Rubber International Hardness Block Calibration Record Format (5) Appendix B Standard Rubber International Hardness Block Calibration Certificate Inner Page Format (6) Appendix C Uncertainty evaluation method and examples of standard rubber international hardness block calibration results (7)

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 formulating this specification Series specifications: During the formulation process of this specification, full consideration was 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: No: and definitions, as well as related technical requirements, technical indicators and inspection methods: This specification gives the standard rubber international hard Specific calibration conditions, calibration items and calibration methods for the measurement characteristics of the scale block (N, H, L scale): This specification is revised from Appendix 1 of JJG666-1990 "International Fixed Load Rubber Hardness Tester": with JJG666- Compared with the:1990 Appendix, the main technical changes in this specification are as follows: ---Convert verification procedures into calibration specifications; ---The hardness tester part of the original regulations is independent of another calibration specification; ---The uniformity requirement of the standard block is changed from 1:2IRHD to 1:0IRHD: The previous releases of this specification are as follows: ---JJG666-1990: Standard rubber international hardness block (N, H, L scale) Calibration specifications

1 Scope

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

2 cited documents

This specification references the following documents: GB/T 2941 Rubber physical test methods General procedures for specimen preparation and adjustment 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: 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: The standard rubber international hardness block (hereinafter referred to as the standard block) is the standard for calibrating the rubber international hardness meter: appliance: 4 Measuring characteristics ① 4:1 Standard block geometry The geometric size requirements of the standard block are shown in Table 1: ① The technical indicators given in the measurement characteristics article are not used for qualification determination and are for reference only: ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 2074-2023_English be delivered?

Answer: Upon your order, we will start to translate JJF 2074-2023_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 2074-2023_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 2074-2023_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.