JJG 2028-1989 Diffuse transmission visual density (black and white density) measurement instrument verification system JJG2028-1989 standard download decompression password: www.bzxz.net
This verification system is applicable to the verification of optical transmission density measurement instruments. It specifies the use of the national benchmark for diffuse transmission visual density. The benchmark includes a full set of basic measurement instruments, the metrological parameters of the benchmark, and the procedure for transferring the unit value of transmission density to the working measurement instrument with the help of the working benchmark, and specifies its uncertainty and basic verification method, etc.

National Measurement Verification System of the People's Republic of China JJG2028-88
Diffuse Transmission Visual Density (Nose White
Density) Counter
Approved on September 11, 1989
Implemented on July 1, 1990
State Bureau of Technical Supervision
Diffuse Transmission Visual Density (Black and White Density) Measuring Instrument Verification System Vcrficatton Scheme ol Measuringnstramente:orDiffuse Transmllon Yisual icnsityJIG202889
This national metrological verification system was selected by the State Bureau of Technical Supervision on September 11, 1989, and implemented on July 1, 1990. The drafting unit
China Institute of Metrology
This calibration system technical provisions are drafted by the person in charge of the interpretation of the calibration system,
specialist in (Chinese Academy of Sciences
Intelligent drafter:
Jiang Geshe (China Institute of Metrology) Let
you
avoid the virtual rate of measuring instruments
determination system"《3）Xi
common mountain No. 1
diffuse transmission visual density (black and white density) metrological instrument calibration system
requires the calibration system to limit the optical radiation of the instrument to the maximum value, the official: the selected country's common room: the enterprise of the institute: the actual sight of the academician, the work of the metrological instrument, the transmission density unit of the measurement system, and the consultation of its inaccuracies. The system consists of three parts, including the building and water price determination, and the reference scene measuring device. The reference scene measuring device, the working method and geometric system of the light error image measuring device shall meet the requirements of the relevant national standards. The national visual density indicator is the color correction light measuring device. When the light is connected to the sample market when selecting the product, the light is measured by the card and the sample market. The source of the light is the light source when the light is measured. Then use the definition of the small optical market to calculate the light density. The whole is recorded without a plan, and the single sex is 1. The national reference measurement geometry is the integrating sphere lighting, 9. The angle of return is collected. Therefore, the quotient of this light condition geometric component is D (90\ media; CIFA: call 10\, V () *, and the optical rate is mainly selected as the diameter of the visual degree. The sampling hole of the reference police station Point is 5.
.1 National Base Ya use kidney suitable for amplification of the natural generation of a good photometric carrier, measure the time ratio of 101 slurry, select the continent! ,1～001 range of light transmittance ratio, Beijing through, =00001 fire, the whole can be measured with a total precision of bzxZ.net
(2,0-504,0).
* of ()
3 West No. 2 capital
7 way Sichuan determined the photoelectric format energy meter as Bin you: as the benchmark, non-section is 0005. Through the standard working surface continuous calibration method, with the standard air degree out of the final full situation, only the original standard of the total return year and the idea is the emperor, "pipe calculation in =2 range for the total uncertainty =0, in =2040 pool total individual afraid is =1521 in order to measure the effect of the oil without the hope of the research ladder light model, through the comparison teaching to obtain the use of non-according to the standard non-case work benchmark . Its sub-number representation is "10, CA;, V (, in 2 standard figures, total filling degree = 0 =
2.0~4.0 also domestic, purchase Le determine the goods 6 = 0,015. Two basic standard medicines
industry month various densitometers of light source color humidity and depth of production "are all effective entertainment transportation (stored tea institute, top grade market "and other products, what conditions are more full of milk glass wet type, when the film car has the reflection structure, become the same as the national standard, and you try to push the reflection characteristics and change, therefore, the market workers this light, also must Tingchuan plan full transmission standard density film (simple you standard start film) calibration right, in order to carry out effective measurement comparison.
3.1 standard density film is made of photographic emulsion after light addition: star% course. Generally divided into 13~24 levels, and the size of the post and the size of the post are 10m×15mm. In the Liu Zheng i, the adjustment is to keep the moving hidden. For the technical specifications of the standard dense film (such as the wet property, light language, etc.), please refer to the standard specification HG452-26. 3.2 Whether the integral method or the random white effect method is used: 1 out of the school time, the test surface should be shot-side
three working meters
too if the small transmission sales, the user can seek the standard period of scientific and technological distance from the standard, the current value of the basic meter, Mao note that the user can use the standard certificate on the dense film, a stream no longer enters the heart of the ball joint,
1 to accept the standard uncertainty: standard
industry use meter
J.TG 202 E·89
3The total number of the third purchase
in the system is not determined and the number of the work is 2. Four condensation transmission density tiger (white density) meter monthly calibration system block diagram method
excitation transmission density (black self density) metering instrument calibration system standard diagram age entry plan density high country end market
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to launch the actual film
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work according to the temperature method
install the actual work standard+
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deep white standard rate film
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comply with the actual rate let
thank the basic tour density film fast and accurate work benchmark gives the ball density section value this
light improvement degree work Ya
5=0.9132.0204.0
medical industry and T industry total
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