Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG941—1998
Fluorescent Luminance Meter
Issued on November 16, 1998
Implemented on May 1, 1999
Issued by the State Administration of Quality and Technical Supervision
JJG941-1998
Verification Regulations of Fluorescent Luminance Meter
JJG 941—1998
This verification regulation was approved by the State Administration of Quality and Technical Supervision on November 16, 1998, and came into effect on May 1, 1999.
Responsible unit:
Drafting unit:
China Institute of Satellite Science
China Institute of MetrologywwW.bzxz.Net
The drafting unit is responsible for interpreting the technical provisions of this regulation. The main drafter of this regulation:
Sun Dingwen
Participating drafter:
Xue Fengye
JFC 941—1998
(National Institute of Metrology)
(National Institute of Metrology)
Technical requirements
Verification conditions
Verification methods
IV. Verification result processing and verification cycle
Appendix Verification system of variable light photometer
JJG 941——1998
IG 41—198
Calibration procedure for fluorescence brightness detector
This procedure is applicable to the calibration of pointer-type and digital-type fluorescence detectors after they are newly manufactured and repaired. Fluorescence brightness detector is an instrument that measures the brightness characteristics of fluorescent liquid after being excited by ultraviolet radiation. It is achieved by measuring the illuminance of the light meter: the instrument also includes three parts: light detector, indicating instrument, lamp, power supply box and photoelectrode. Technical requirements
1. The surface of the fluorescence brightness detection device [including photoelectric detector, (!), filter, corrector, residual glare corrector] should be clean and free of marks such as braids and dots. The surface of the needle-type single-line detector should not be broken, and the needle should not have defects such as jamming, bending, deformation, etc. The digital or instrument dial should be clean and the display should be clear and complete. The carbon plate should be kept clean and moldy. The power supply box should be in good condition. 1. The photoelectric detector of the wide-band photometric detector must have a (input) filter band, and the spectral response of the wide-band photometric detector must match the harmonic efficiency of the international lighting industry, and the matching error number is 5. 3. The measurement range of the fluorescence brightness detector: the illuminance is (0-500) 1x: the auxiliary illuminance is (0-2.8) m/cm; the measurement uncertainty of the brightness detection is: the illuminance is 4% (50k: 3011x]; the irradiance is 11% (0.3mw/cn21.7mW/rm):
The annual stability of the fluorescence is 2:
2. Verification conditions
4. Verification of fluorescence brightness detector The device mainly includes: digital radiation source, optical radiation source, standard light intensity tester, standard carbon plate, white paper for calibrating light intensity, fixed bottom plate, adjustment shelf and central illuminator. 4.1 The external radiation source is a 125W high-voltage fluorescent lamp with a radiation core wavelength of A-365rm. The black light bulb shell is brushed and installed vertically downward. The radiation is uniform and protected by a white lampshade. 4.2 The white radiation source is a 1KW incandescent bulb. It is installed vertically downward. The radiation is uniform and protected by a white lampshade. 4.3 The standard wide-angle light brightness detection instrument is composed of a pointer meter or a digital meter, a photoelectric detection terminal, a shell, a power box, and a standard fluorescent board. |4.4 The standard fluorescent plate is made of undetermined phosphor and adhesive. The wavelength and intensity of the fluorescence excited under the irradiation of ultraviolet radiation of a certain intensity are stable:
4.5 The color photographic paper shall not turn yellow when exposed to the test light. 4.6 The neutral dimmer has a sufficient working range. It can make the instrument indicate 501x by using it. 5 Power supply equipment
2V AC total voltage source is combined, and the voltage regulation accuracy is ±1mm. The factory inspection is qualified 1 nuclear high-voltage lamp ballast lamp: 6 The ultraviolet auxiliary radiation source and the ultraviolet radiation source are supported by the west support and have 3 white degree adjustment. The working platform is stable, city-state, and level:
JJG 941—L998
7 The signing environment is temperature (2515, humidity less than 85%). III. Verification method
8 Before verification, the appearance should be inspected according to the first part of this regulation. Any instrument that meets the above requirements will not be calibrated.
9 The calibration of the photometer is
9.1. Move the white radiation source to the lower part and adjust it to a fixed position (the position can be the same during each calibration). Turn on the power supply and preheat for 5min.
9.2 Connect the standard light meter to the power supply: preheat for 5min.9.3 Put the white negative photographic paper on the spare support of the standard light meter and put it into the instrument. Place the instrument on the workbench in a position relatively evenly spaced from the radiation source to the horizontal, open the instrument cover, move the position of the instrument so that the meter indicates 250, close the instrument and mark the position of the end when comparing (so that the position of the instrument can be repeated), put the instrument under the outer cover:
9.4 Put the color photographic paper in the spare opening plate of the fluorescent light detector to be tested, place the instrument under the incandescent lamp on the workbench, in the same position as the standard instrument, open the instrument cover, observe the value of the instrument, and adjust it so that the value of the brightness test is consistent with the value of the brightness test. 20. Put down the instrument, turn off the white radiation leakage and move out of the work area. 10. Verification of fluorescent plate
10.1: Move the ultraviolet radiation source into the work area, adjust it to a fixed position (the position is relatively stable each time), turn on the source, and heat for 15min
.2 Place the fluorescent plate with the standard effect on the tray of the standard fluorescent brightness detector, and place the instrument on the workbench under the ultraviolet auxiliary radiation source at a relatively uniform position of the radiation field, turn on the instrument, and make the instrument indicate 250k, that is, 2s=250. Close the instrument cover and know the position of the instrument at this time 10.3 Place the fluorescent plate on the test instrument in the same position, open the false cover, observe and record the instrument indication S2x0
14 Replace the standard instrument, adjust the height of the ultraviolet temporary radiation source or the linear dimming, so that the instrument indicates 50 area, that is, B% 3. Close the instrument cover, determine the position of the instrument at this time, and disconnect the instrument from the workbench. 10.5 According to the method in 10.3, record the indication Ssc of the instrument under test 10.6 According to the method in 1.4, make the standard instrument indicate 1501x , i.e. B150-150. 10.7 According to the method in 10.3, record the indication of the instrument under test S150c 10 According to the method in 1.4, make the standard instrument indicate 300k, i.e. %-300k. 10.9 According to the method in 10.3, record the indication of the instrument under test S0 10.10 Remove the instrument from the workbench. Close the radiation source of the outer box, wrap the standard acquisition sheet and square photo paper with plastic and store them in a dry place.
Verification result processing and verification cycle
1 Verification result processing
941—1999
11.1 In the calibration of optical variable meter, the standard instrument indicates 2501x. If the instrument under test indicates a deviation from 251x, it should be adjusted to 250x;
11.2 In the calibration of fluorescent plate, the standard instrument indicates -501x, :5=150, H250=21x, H300=300, and the corresponding indications of the instrument under test are Ss0, S, S250, S11.2.1 If S0=Bz50=25UL, the fluorescent plate is qualified. 11.2.2 If S1 is equal to B50: use the following judgment formula: B250- S20 × 100%
11.2.2.1 If >4%, the fluorescent plate is unqualified and a new fluorescent plate should be replaced. 11.2.2.2 If 4≤4%, the repair coefficient 3 is taken. 11.2.3 If Ssu, Si, S are not equal to B, Bis, B respectively, the repair coefficient is given: =
Standard value of the instrument under test S=Indication value of the instrument under test S:xRepair coefficient, that is, S= S:× P
12Verification cycle
(=50,150,250,300)
The inspection cycle is 1. If the number of uses is relatively large, the environment is humid, and there is no storage equipment, the inspection cycle can be appropriately shortened.
When submitting for inspection, the previous verification certificate should be brought along. .3
JJG941
Fluorescence brightness detector calibration system
Illuminance Yujia standard
(10 ~ 3) × 10° L
1.= 0.17%
Light rail calibration reaches
Illuminance sub-basic type
[10 ~ 3] × 10°
Photoelectric photometric ratio
Light pressure working H standard
(6× 103- 3× 1021k
4,=0.2 yuan
Photoelectric photometer comparison method
First-level illuminance standard
(6×103×10)
Light calibration method
Light radiation heat national standard
(High temperature irradiation furnace and full rate device]
T.Working length (250~300)m
Working width 2000～0)K
4,= (1.1 - 3.9)%
Light-assisted radiation substitution method
Light-made illuminance matching reference lamp set
TWorking wavelength (250~25(0)m
4,= (1.2~ 3.9)%
Spectral radiation substitution method
Light-fall irradiance working reference lamp set
Working wavelength (250-25(00)mm
4.= (1.3- 4.0)%
Ultraviolet illuminance meter calibration device
Standard ultraviolet illuminance meter
4,= 10%
Cultural calibration method
Standard light attenuation detector
Illuminance (50.-350)x
External illuminance meter
(0~2.8)mW/an
Cat illuminance (0.3~2.0)mW/urm2
Comparison method
Fluorescence brightness detector
Illuminance meter
10 ~500)1x
Illuminance (50~350)1x
Ultraviolet illuminance meter
(0~2.8)mW/cm
Photo illuminance (0.3--2.0)mW/am
u,= 11%
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