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.

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
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