Some standard content:
Verification Regulations of the People's Republic of China JJG 917—1996
Cotton Colorimeter
1996-11-18 Issued
1997-05-01 Issued
State Technical Supervision Bureau Issued
JJG 917—1996
Verification Regulations of Cotton Colorimeler
JJG917—1996
This verification regulation was approved by the National Technical Supervision Bureau on November 18, 1996, and came into force on May 1, 1997.
Responsible unit: China National Inspection and Quarantine Bureau
Drafting unit: Department of Precision Instruments and Mechanics, Tsinghua University The technical drafting unit of this regulation shall be responsible for the interpretation of this regulation. The main drafter of this regulation:
Zhang Enyao
Participating drafter:
Han Shiping
J.1G917—1996
Department of Precision Instruments and Mechanics, Jiehua University】(National Fiber Metrology Station)
(National Fiber Metrology Station)
Technical requirements
Verification conditions
Verification items and verification methods
Verification result processing and verification cycle
Verification record format of cotton colorimeter
J JG917—1996
JIG9171996
Verification procedure for cotton colorimeter
This regulation is applicable to the verification of colorimetry of new, used and repaired cotton. Overview
1 Cotton colorimeter (hereinafter referred to as colorimeter) is an instrument for measuring the color of cotton based on the principle of colorimetry. The colorimetry measuring part of the instrument consists of a light source, filters, detectors, etc. The relative spectral transmittance of the original light source, the equivalent spectral transmittance of filters and all optical elements, and the relative spectral power distribution of the photoelectric detection area and the standard luminaire are proportional or approximately proportional to the product of the standard chromaticity coefficient.
In the chromaticity measurement of cotton, the HT system is generally used. The parameters R represents the color of cotton, R represents the reflectance factor, h represents the red or green component of the reflected light, and h represents the yellow or blue component of the reflected light. The X, Y, and Z-stimulus values of the object are measured using the IF1931 chromaticity system, which can be calculated as the R value of the object. There is the following correlation between the HT system and the IF1931 chromaticity system: R = F+ = 175f,(1.02X - Y)
o=7f(y0.847z)
=0.51.(21F20Y)/(1-20Y)
For cotton, the main factor is the change of Rd+5 parameters, so the sum of 1 is generally used to represent the color characteristics of cotton.
2 Technical requirements
2 External and basic condition requirements
2.1 The colorimeter should have a nameplate indicating the name, manufacturer, product number and manufacturing date of the instrument. 2.2 The colorimeter should not have defects that affect the measurement performance. The panel and surface of the newly manufactured colorimeter should not have scratches, cracks and deformation. The surface should not have bubbles, etc. 2.3 The optical, mechanical and electrical operating parts of the colorimeter should function normally. The display and indication parts should be complete and stable. 2.4 The matching white board and negative board should be stable and stable, and there should be no defects that affect the performance. They must be verified by the national measurement department. 3 Electrical safety requirements
The power supply should be safe and reliable. The insulation resistance of the power phase line and the instrument shell should be greater than or equal to 2M. There should be a reliable grounding terminal and obvious liquid mark, and the grounding is good. 4. Lighting and viewing system
Color calibration should choose 45 lighting, 0 receiving side or. S test bacteria
s.1 Commercial size status requirements
JJG 917—1996
The effective area of the test window is not less than 85r.x85:n, the commercial three glass is full of normal, without cracks and other defects, 5.2 Weekly uneven illumination
The illumination within the test aperture is less than %
6 Cotton generation proof for the application of (2=0.49)V scale force, (or put the quality of (510.051) on the flower
7.1 Indication stability and ductility
Newly manufactured position measurement false element value range The qualitative should reach: Ra) 0.2 a+0) 0.2 (unit): Health and repair of the color measurement agreement in the product to 1 description of the standard 7.2 electric music change cloud value rapid delivery
current to make the domestic change (220132V drag, the display times stability should be selected to: AHR) 0.1 service): +) (unit):
5 weight
display value repeatability should reach: (R) two 0.1%): +6) 0.1 (unit. 9 standard Accuracy
9.1 The minimum deviation of the standard color plate
The indication difference of each standard color plate should be: A (R% 0.4 (unit): A/(-)4 (unit) 9.2 The indication deviation of the standard cotton sample
The value of the standard cotton sample should be: A/m () 0.5 (%) A1) 0.5 (unit) Three verification conditions
10 The ambient temperature is (2012), the relative temperature is (65-5%, the power supply is For (2+22)V11, see Table 1 for the instrument for determining cotton powder. Table 1 Instrument for determining cotton powder. Instrument name AC calibrator Standard color [Original standard depth is not specified. This technical requirement is 158-242a White, yellow, center, brown Name 1 Block standard end: R: ±0.2%) 4 : ±1.3(with
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JTG: 917—1996
Table 1!
This technical company
Research voltage range 500V
Resolution rate 0.1V
Verification items and verification methods
Through visual inspection and operation inspection, the results shall comply with the requirements of Articles 2.1-2.4. Electrical safety inspection
Use a multimeter to check the grounding condition, and use an insulation tester to measure the insulation resistance of the power supply system in the electrical part. Both meet the requirements of Article 3:
14 Lighting and inspection condition inspection
Through the test, the results shall meet the requirements of Article 4. 15
Test window calibration
15, 1 Use steel ruler to measure window 1: small, visually check window, water supply should meet the requirements of Article 5.1, 15.2 Uneven lighting
Use illuminance meter to test window and central area illuminance, lighting unevenness is: A5 =
Meanwhile: one value
E..—illuminance value is the minimum)..
Surface…illuminance value is the minimum).
The surface…illuminance value is the minimum).
The surface…illuminance value is the minimum).
The surface…illuminance value is the minimum).
16 Cotton test strength
i × 100%
The constant value of the machine is set as the value under test. The test result should meet the requirements of the first paragraph.
17 Stability of colorimeter
17.1 Stability of indication
After preheating at a certain frequency, the colorimeter shall be calibrated with the special plate attached to the instrument. The standard piece with a leakage of 5m1 shall be tested. The judgment method for the stability of indication is: At
Formula: -
The average value of each measurement:
JIG 917—J996Www.bzxZ.net
-The maximum deviation of each measurement from L-
The constant stability of indication shall meet the requirements of Article 7.1.
[7 Voltage variation indication verification
Use an AC instrument to calibrate the colorimeter to 220V, 242V and 198V in turn, and measure the R and I values of the standard electrode respectively. The voltage variation indication stability is defined as: AH = H,:
where: H,——measurement value under 220V voltage; H——measurement value under 242V or 198V voltage. The result should be consistent with the first one.2 black meters. 18 The instrument is used for single copy
continuous slow on the R of the standard white plate, and the value is measured 10 times. The single compound dosage formula is 1 (.-
formula T: x-
, etc., the single value is:
the average value of a measurement;
measured to the desired number,
measurement results should meet the requirements of Article 8.
19) The instrument is accurate in
V.1 Standard color extreme indication difference
Liu standard color (5 pieces) R,
value for measurement, each color plate is measured 3 times, and the difference between its indication average value and the chromaticity of each white of the standard color is defined as: a||t t||Test: - the color of the same color plate as the international standard color plate; - the average of the measured positions:
The result meets the requirements of Article 9.1
19.2 Standard sample water value deviation
For a variable standard file, when testing, the small force on the cotton bar meets the provisions of Article 6, and each single cotton sample is tested 3 times. The average value and the color value of each white in the standard method are defined as accuracy: AM=TN-T
In the test: J reward
- the negative value of the standard sample;
The average of the measured results. The test result should be calculated according to Article 9.2,
JJG 917199
V. Verification result processing and verification cycle
For qualified negative gauges: issue a verification certificate; for unqualified ones, issue a verification result report. 20
The verification cycle is generally determined by the usage situation, and the longest period is no more than 2 years. Inspection unit
1 Appearance and basic technical status
3 Stability
?.1 Stability of indication
JJG 917—1996
Cotton colorimeter calibration record format
Regulation model
Calibration month.
Lighting conditions
, instrument number
, ambient temperature
Test density!
Results of each state test
Voltage change value stability
Results after aging
Recovery|| tt||Each training currency
Manufacturing unit
, relative humidity
Precision quality
Gas outlet safety performance
Average position
Indication value connection
Voltage change indication
Qualitative FF
Flat box
Standard temperature
4 degrees tellurium
Standard color test range||t t||cup standard wire, pole
board parameters
5 times test
salt set
balanced position
4.2 standard cotton sample test set
standard Jinchan
internal slip pain
auspicious parameters
3 times test
most nolai
calibration unit compensation
JJC917·1996
calibrator
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