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JJG 452-2021: Verification Regulation of Optical Step Tablet
Status: Valid JJG 452: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 452-2021 | English | 379 |
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4 days [Need to translate]
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Verification Regulation of Optical Step Tablet
| Valid |
JJG 452-2021
|
| JJG 452-2006 | English | 639 |
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3 days [Need to translate]
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Verification Regulation of Black and White Step Tablet
| Obsolete |
JJG 452-2006
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| JJG 452-1986 | English | 279 |
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3 days [Need to translate]
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Verification Regulation of Standard of Black-White Photographic Density Tablet
| Obsolete |
JJG 452-1986
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PDF similar to JJG 452-2021
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)
Table of contents
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,
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