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JJG 212-2003 English PDF

US$639.00 · In stock
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JJG 212-2003: Verification Regulation of Colour Temperature Meters
Status: Obsolete

JJG 212: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 212-2003	English	639	Add to Cart	3 days [Need to translate]	Verification Regulation of Colour Temperature Meters	Obsolete	JJG 212-2003
JJG 212-1990	English	279	Add to Cart	3 days [Need to translate]	Verification Regulation of Colour Temperature Meters	Obsolete	JJG 212-1990
JJG 212-1980	English	RFQ	ASK	3 days [Need to translate]	(Chinese Industry Standard)	Obsolete	JJG 212-1980

PDF similar to JJG 212-2003

Standard similar to JJG 212-2003

JJG 178 JJG 245 JJG 810 JJG 452 JJG 512 JJG 211

Basic data

Standard ID	JJG 212-2003 (JJG212-2003)
Description (Translated English)	Verification Regulation of Colour Temperature Meters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A60
Word Count Estimation	16,153
Date of Issue	2003-05-12
Date of Implementation	2003-11-12
Older Standard (superseded by this standard)	JJG 212-1990
Quoted Standard	GB 5702-1985; JJG 213-2003
Issuing agency(ies)	State Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to color meter (meter) of the initial verification, testing and use of the follow-up inspection. Shape identification, prototype testing requirements for performance measurement can be performed with reference to the order.

JJG 212-2003: Verification Regulation of Colour Temperature Meters

---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.
Verification Regulation of Colour Temperature Meters National Metrology Verification Regulations of the People's Republic Color temperature meter Released on.2003-05-12 Implementation of.2003-11-12 The General Administration of Quality Supervision, Inspection and Quarantine issued Color temperature meter verification procedure ColourTemp eratureMeters Replace JJG 212-1990 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on May 12,.2003, and Implemented on November 12,.2003. Focal Point. National Optical Metrology Technical Committee Drafted by. China Testing Technology Research Institute This procedure entrusts the National Optical Metrology Technical Committee to explain The main drafters of this procedure. Zhang Yanhua (China Testing Technology Research Institute) Xie Xingyu (China Testing Technology Research Institute)

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 indication repeatability (1) 4.2 Linear deviation (1) 4.3 Directional deviation (1) 4.4 indication deviation (1) 4.5 years stability (2) 5 General technical requirements (2) 6 measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification project (3) 6.3 Verification method (3) 6.4 Processing of verification results (4) 6.5 verification period (5) Appendix A Temperature Filter and Standard Lamp Combination, Calculation of Transmitted Light Distribution Temperature (6) Appendix B Verification Certificate Format (Back) (8) Appendix C Uncertainty Analysis (9) Appendix D Related Instructions (11) Color temperature meter verification procedure

1 Scope of application

This procedure applies to the first verification, subsequent verification, and inspection in use of the color temperature meter. Stereotype identification, sample The requirements for metering performance in the machine test can be implemented with reference to this procedure.

2 Citations

GB 5702-1985 "Light source color evaluation method" JJG 213-2003 "Distribution (color) temperature standard lamp verification procedures" At the time of citation, attention should be paid to the use of the currently valid version of the above documents.

3 Overview

A color temperature meter is a portable instrument that measures the (spectral) distribution temperature of a light source in the visible wavelength range by a two-color ratio method. table. The two-color ratio used is usually a blue-to-red ratio (b/r) and a green-red ratio (g/r). The meter is mainly composed of the probe part (including Red, green, and blue filters, photodetectors, and electrical display (meters). According to the display method can be divided into several Both font and pointer. It is mainly used to measure the temperature distribution of photography, camera illumination sources and other modern light sources. degree. The color temperature and the distribution temperature are strictly different in concept. The "color temperature meter" is also a customary name. but, For light sources with similar spectral power distributions and black bodies, such as incandescent tungsten lamps, their color temperature values and distribution of visible wavelength ranges The temperature values differ little in value and can be considered the same within the usual measurement error range; however, for spectral power Light sources that differ greatly from blackbody, such as fluorescent lamps or other types of discharge lamps, may have very different values. Big. Since the measurement principle of the color temperature meter is based on the most simplified two-color ratio method, it is only suitable for measuring the spectral power distribution. A light source similar to a black body.

4 Metrological performance requirements

The color temperature meter is measured by the (b/r) block under the illumination of CIE-A standard light source (ie 2856K), and the relevant performance should be The following requirements are met separately. 4.1 indication repeatability The measurement was repeated three times at 500 lx illuminance, and the difference in the indicated value did not exceed 20K. 4.2 Linear deviation Measured under 250lx and 1000lx illuminance, the indicated value does not change more than 20K. 4.3 Directional deviation Under the illumination of 500 lx, when the incident light deviates from the vertical illumination direction by ±15°, the indication value does not change by more than 20K. 4.4 indication deviation The color temperature meter is in the range of (2000~9000)K, and its deviation is shown as the difference between the reciprocal of the temperature, and (b/r)

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Question 5: Should I purchase the latest version JJG 212-2003?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 212-2003 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.