JJG 923-1996 Beer Colorimeter Verification Procedure JJG923-1996 Standard download decompression password: www.bzxz.net
This procedure is applicable to the verification of colorimeters that are newly manufactured, in use, and after repair, and work in EBC colorimetric units.
Some standard content:
Verification Regulation of Beer (EBC) Colorimeter JJG923-1996 This Verification Regulation was approved by the State Bureau of Technical Supervision on November 12, 1995 and was effective from May 1, 1997. Effective from January 1, 2016, Responsible unit: China Testing Technology Research Institute Drafting unit: Hebei Metrology and Testing Institute The main drafting unit of the technical provisions of this regulation is responsible for interpreting the main drafters of this regulation: Wang Shuqin Ben Lantian Participating drafters: Wang Shuiyan JIG 923-90G (Hebei Metrology and Testing Institute) (Hebei Metrology and Testing Institute) (Beijing Optoelectronic Equipment Factory) (Hebei Measurement and Testing Institute) Technical requirements Three verification items Four verification items and verification methods No verification result processing verification period Appendix LFBC standard oil color coordinates J JC923--1996 Appendix 2 Calculation method of chromaticity coordinates of FEC color film Appendix 3 ([E standard illuminant B relative spectral power distribution and 193 chromaticity function (1; JG923-1996 Beer colorimeter verification procedure This procedure is applicable to the verification of new, used and repaired beer colorimeter working in EBC colorimetric unit. Overview||tt| |The beer colorimeter is produced using the internationally accepted European Brewing Company (positive B center) color unit and grading standard. It is an instrument used for beer classification and grading. The instrument consists of an illumination source, a special color film and a viewing part. The brightness and color in the field of view are adjusted by visual inspection to match the brightness and color of the sample. In the field of view, the color of the EBC color film is presented on the left and right respectively: the color of the sample is presented in the middle. The color in the field of view is visually observed at the observation window, and the brightness and color in the field of view are adjusted by adjusting the EB color film. When compared, the indication of the EBC color film is the color value of the sample being measured. 2. Technical requirements 1. Appearance requirements The instrument has a model, manufacturer, factory number and date. 1.2t The components and accessories inside the instrument and the working light path should be complete, intact and clean, and there should be no defects that affect the measurement accuracy. The colorimeter of the instrument should be complete, clean and free of damage. The measuring range of the instrument should meet the requirements of Table 1. 1. Color plate Dark color 3EL color patch charging difference The E1C color patch matching with the instrument should meet the requirements of Table 2. 4 Instrument light source Measurement range FHC: unit 2.0-:11.0 10.0.-27.0 The instrument lighting source is a combination of a tungsten meter and a color temperature filter. The color temperature of the transmitted light is corrected to 5000K (equivalent to B light source, which has been cancelled by CIE, but is still used in the beer colorimeter specified by the European Brewing Association and is measured at the time of release). 5 Product pool The sample pool used with the instrument should have a light rejection ratio greater than 80% in the wavelength range of 380 (400)--7K0131m1 .IIG9231996 refers to an average value over the range of individual liquids), and the transmitted light ratio is % (refers to the average value of the natural transmission ratio of each wavelength). The product specifications are nominal! ; The measured value does not exceed 1mm Table 2 Vortex color band 5.5. -11.0 10.0 --14.0 15.0 -20.0 21.0 -7.1 6 The coordinates of the single-view field of view are not over-fitting not over-positioning! 1 -not exceeding ±0.C4 not exceeding this m not exceeding ±U.U2 etiquette must be active, the bottom center can be, I wish you a hot world when the light and smooth evaluation and Bin accuracy temporarily rely on the road test this ring) intelligent proposal can travel the predicted degree of soil 0.5EFC chromaticity single test three test conditions S board decay ring strip agent not exceeding ±center , Not too rough: 1.4 Not discuss 1.0 Rate chart temperature information (2+5:, relatively small mud room 75 series, case shop no channel light, book rot unique gas: 9 ticket inspection equipment allowed 9. [and promise title, color this light measurement color proposed its work length range is 380--7801, not less than 400~700mm: wavelength total uncertainty 0,4 :rr, the half-true value of the 0.2 nm line is less than 0.2%. And the colorimeter is usually used as a parent card, the repeatability is 0.2, the stability is 0.2 within 30 ir: the total uncertainty of color (a1, a2) is [. ]: A,y is 0.002.3,2 marked E color bZxz.net The color uncertainty of the light disk is +: the color uncertainty of the dark disk is -0.21. .. y.3 pants standard caliper sent to the system room for 0.02tmm calibrator if the instrument is verified by the standard shore method. The qualified personnel must be visually correct, the color is normally correct, the dead type test, oil increase: the shooting or color of the party cannot be from the half-good item calibration 11, qualification conditions wide table (now table 3) awkward determination items external visual infant request discussion tour measurement enterprise standard accuracy of the instrument Environmental liquid EBC. Color piece optical requirements Xiang Zhan Nest Optical specifications 12 Appearance verification JJ Center 923—1996 Table 3 Verification items, conditions, methods Setting case Fixed value color piece Standard color piece or optical colorimeter Optical color measurement structure caliper Verification items and verification methods||tt| |Use visual inspection or hand feeling to judge according to the requirements of the first kill. Summary of the verification method of the rapid measuring range of the instrument Oral suggestion, qualitative identification by hand Move the human path, visual judgment Direct measurement Daily operation or instrument measurement Measurement and display judgment Daily selection judgment Move the color pieces on the left color disk into the light path one by one on the instrument, and double-check the value of the corresponding color piece; intelligent instrument direct measurement 3.0EBC and 25.0FBC color chips, judge the range according to Table 1, and determine whether the color chips are sufficient. 14. Instrument color EBC tolerance verification (spectral photometry and standard color chip method selection) 14.1. Spectrophotometry Use a spectrophotometer that meets the technical requirements of Section 9.1: Place color chips with different values in the color disk into the transmission light path of the colorimeter, and measure the transmittance ratio within the range of 380780nm (wavelength interval is 10nm). Then, calculate the value of the chromaticity coordinate of the F2\ viewport illuminated by the R light source. The value of the color chip's element difference (expressed in chromaticity coordinates) should meet the requirements (the calculation method of chromaticity coordinates is shown in Appendix 2). This method is used as a method for measuring and testing the sample. 14.2 Standard color film method First, the observer carefully observes the brightness and negative mean in the field of view. Then, in the field of view, move the negative film to the left and right of the instrument, and the standard color film to the middle (the sample position). Turn the color wheel to adjust the color film value to the same as the standard film value, so that the light difference of the instrument color film AFRC = the standard value 15 Verification of the transmittance and colorimetric value of the sample pool 15.1 The transmittance is measured by using a secondary (including secondary) or higher light source to measure the colorimetric value of the spectrum from 380nm (400nm) to 70nm (70nm). The half-mean transmittance should be greater than B0. 1S.2 Use a vernier scale to measure the brightness of the sample pool. The difference between the nominal value and the measured value should meet the requirements of Article 5. 16 Standard field average and quality verification Use the visual method. Move all the color risers out of the light path, and the observation field should be uniform. 3 Verification of the accuracy of the false device JIG9231996 The values are directly measured by the intelligent instrument to 3.0, 6.0, 9.5, 11.0 (EBC) standard color film, the difference between its measured value and the standard value meets the requirements of Article ?. V. Verification Result Processing and Verification Period 18 The verification certificate is issued for the qualified instruments; the inspection result notice is issued for the unqualified instruments. 19 The repaired instruments are judged as unqualified except for the appearance and the spectral transmittance of the sample cell. 20 The verification period is set at 1 year. When the instrument is replaced with a new sheet or light source, a new inspection must be performed. Appendix 1 EEC chromaticity unit JJG 923—1996 EBC standard chromaticity coordinates EBC chromaticity coordinates Appendix 2 : Calculation of micro values JG9231996 Calculation method of EBC color sheet shear chromaticity coordinates X --Ks() -(Tt: F - KES() T()2A) Z - RYS(A) :2TA)xTA)AA --the standard spectral energy distribution of a light source; ()--the spectral transmittance ratio measured by the color filter; (,,(—C[E1931's degree≤number: A·Timing micro-interval, generally take 0nm:--the adjustment factor is to round the Y value to 1 and get: K K-ES(A)-CAyAAA 2 color coordinates,,2's identification T-x+yz 3=X+Y+2 can also be used Appendix 3 JIG:923—1996 CIE standard illuminant B relative spectral power distribution and 1931 chromaticity function B relative light distribution 0.004 243 0.043 510 4.134 380 0.283 900 .3.18 2.8) 0.195 360 0.032 010 0.433 450 | 770 .02700 .011359 0.005 790 0.000 640 0.000 332 0.00n 083 1.00O 042 193 color break U. 000 039 0.omm 120 0.001 210 0.u60 000 0.139 020 0.208 12m 0.954 000 door.994 050 0.995 4HU .952om 0.870 000 4.50.3 000 0.3831 000 0. [75 03 n.001 047||tt| |0.000 521) 0.000 249 0.000 120 n.900 06n 0.000 015 n.020 050 0.067 850 1.385 600 | ||0.000 340 .00190 .000050 0.000 00000190 .000050 0.000 00000190 .000050 0.000 000 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.