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JJG 452-2021 English PDF

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Q: Should I purchase the latest version JJG 452-2021?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 452-2021 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.

US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 452-2021: Verification Regulation of Optical Step Tablet
Status: Valid

JJG 452: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 452-2021	379	Add to Cart	4 days	Verification Regulation of Optical Step Tablet	Valid
JJG 452-2006	639	Add to Cart	3 days	Verification Regulation of Black and White Step Tablet	Obsolete
JJG 452-1986	279	Add to Cart	3 days	Verification Regulation of Standard of Black-White Photographic Density Tablet	Obsolete

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Basic data

Standard ID: JJG 452-2021 (JJG452-2021)
Description (Translated English): Verification Regulation of Optical Step Tablet
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A60
Classification of International Standard: 17.180
Word Count Estimation: 17,196
Date of Issue: 2021-12-08
Date of Implementation: 2022-06-08
Issuing agency(ies): State Administration for Market Regulation
Summary: This standard applies to the initial verification, subsequent verification and in-use inspection of newly manufactured and in-use transmission black and white density sheets. The requirements for metrological performance in the type evaluation of black and white density sheets can be implemented with reference to this standard.

JJG 452-2021: Verification Regulation of Optical Step Tablet

---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 Verification Regulations of the People's Republic of China black and white density film Optical Step Tablet 2022-06-08 Implementation Released by the State Administration for Market Regulation black and white density film Verification Regulations Optical Step Tablet Replace JJG 452-2006 Responsible unit: National Optical Metrology Technical Committee Main drafting unit: China Institute of Metrology China Institute of Testing Technology Participating in the drafting unit: Liaoning Institute of Metrology This regulation entrusts the National Optical Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation: Liu Zilong (National Institute of Metrology, China) Xiaoxiao Chen (China Academy of Testing Technology) Xu Ning (National Institute of Metrology) Participating drafters: Li Yuxiao (National Institute of Metrology) Jiang Yiqin (National Institute of Metrology, China) Li Zhuoran (National Institute of Metrology) Zhang Wenmei (Liaoning Institute of Metrology)

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 terms(1) 4 Overview(1) 4:1 Measuring principle(1) 4:2 Classification of density sheets (2) 5 Metrological performance requirements (2) 5:1 Diffusion characteristics of standard density sheets (2) 5:2 Spectral transmission characteristics of standard density sheets (2) 5:3 Density flake value (3) 5:4 Uniformity(3) 5:5 Annual change(3) 6 General technical requirements (3) 6:1 Appearance(3) 6:2 Signs(4) 7 Measuring Instrument Control(4) 7:1 Test conditions (4) 7:2 Verification items (4) 7:3 Verification method (5) 7:4 Test result processing (5) 7:5 Verification period(5) Appendix A Verification Original Record Reference Format (6) Appendix B Verification Certificate (Back) Reference Format (7) Appendix C Example of Uncertainty Assessment (8)

Introduction

JJF1001-2011 "General Metrology Terms and Definitions", JJF1032-2005 "Optical Radiation Metrology Terminology" and definitions", JJF1059:1-2012 "Assessment and Expression of Measurement Uncertainty" and JJF1002-2010 "National The "Rules for Compiling Quantitative Verification Procedures" together constitute the basic series of specifications for the revision of this regulation: This regulation replaces JJG 452-2006 "Black and White Density Film", compared with JJG 452-2006, except for editorial modifications In addition, the main technical changes are as follows: --- Modified the classification and name of the density film, mainly adding "X-ray density film" (see 4:2); --- Modified the corresponding requirements for different types of density sheets in the metering performance (see Chapter 5): The previous releases of this regulation are as follows: ---JJG 452-2006; ---JJG 452-1986: Black and White Density Sheet Verification Regulations

1 Scope

This regulation is applicable to the first verification, follow-up verification and in-use transmission black and white density film newly manufactured and in use: examine: The requirements for metrological performance in the type evaluation of black and white density sheets can be implemented with reference to this regulation:

2 References

This procedure references the following documents: GB/T 11500-2008 Photographic Densitometric Measurement Part 2: Geometric Conditions for Transmission Density GB/T 11501-2008 Photographic Densitometric Measurement Part 3: Spectral Conditions For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation:

3 terms

The reciprocal of the transmittance takes the logarithm with base 10, namely: Dτ=-lgτ (1) In the formula: Dτ --- transmission (optical) density, the unit is 1; τ --- transmittance, the unit is 1: 3:2 Uniformity In a circle with the center point of the density sheet as the center and a radius of 3mm, select each direction in the four directions of up, down, left and right: Take 1 measurement point and form 5 recommended measurement points together with the central measurement point: The measured maximum density Dmax and One-half of the difference between the measured minimum density values Dmin: Expressed by formula (2): UD=(Dmax-Dmin)/2 (2) In the formula: UD---Uniformity; Dmax---the maximum value of the measured density; Dmin---The minimum value of the measured density: 3:3 annual variation peryeardrift The absolute value of the difference between the density value of the tested density sheet and the density value of the previous year: Measure the density value of the certified density sheet step by step within the range of 0 to 2:0, and take the maximum change as the annual change:

4 Overview

4:1 Measuring principle The density measurement device is mainly composed of light source, optical components and receiver: After the light emitted by the light source passes through the optical components, ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 452-2021_English be delivered?

Answer: Upon your order, we will start to translate JJG 452-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 452-2021_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 452-2021_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.

Question 5: Should I purchase the latest version JJG 452-2021?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 452-2021 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.