JJG 2031-1989 Calibration System for Exposure Measuring Instruments JJG2031-1989 standard download decompression password: www.bzxz.net
This calibration system is applicable to the calibration of exposure measuring instruments. It specifies the transfer procedure of exposure values ​​in lux seconds (lx·s) from the reference to the working measuring instruments, and specifies the error relationship and basic calibration methods.

National Metrology Verification System of the People's Republic of China J3G203-89bzxz.net
Light Meters
Approved on September 11, 1989
Implemented on July 1, 1990
State Bureau of Technical Supervision
Verification System of Meusuring Instrumentsfor Light Exposure
This national verification system was approved by the State Technical Advisory Committee on September 11, 1969, and has been implemented since July 1, 1990. The Chinese Academy of Computer Science is the main unit responsible for the implementation of the system. The main drafter of this calibration system is Liu Chongxiao (China Institute of Measurement Science)
Guizhou Measurement Instrument Calibration System
JJG2031—69
Xiguang Measurement Instrument Calibration System
This calibration system is suitable for the calibration of light instruments, which specifies the detailed measurement sequence of the measurement instrument using the unit of physical light (1) as the reference, according to the basic requirements of the calibration personnel and the periodic error, and is composed of three parts: metrological reference instruments, metrological standard instruments and other working metrological instruments.
Metrology reference
1 To measure the national base: to reproduce the light quality (unit: g, symbol: "g"), and pass the maximum value to the relevant meter to ensure the accuracy of the national standard. The main components of the national standard light meter include: weak current standard lamp, drop-type shutter, light-proof guide, color temperature conversion device, small gray reduction, self-current voltage regulator, fast differential meter, standard oil, standard resistor, detector, photoelectric light converter and digital rate meter.
3 To reproduce the national standard light quality and total uncertainty 3.1 Exposure range
month. When the color temperature is 2856K, the forbidden light range is 0004~401x-, -2,40~+1.60g 11 units. b, when the color temperature is 3200K, the range of light quantity is: D003~303, the logarithmic range of light quantity is: -2.50~+1.50tgH unit, when the color temperature is 5500K, the maximum light quantity range is, D00~10x9, the logarithmic range of the purchased disk is 300~+1.001g unit, 3.2 Total uncertainty
The total uncertainty of the national standard of light quantity is 001g day unit (blue metal four-1 below>.:
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Three meter standard instruments
JJG2031-89
The standard sensor is the standard instrument for transmitting the five volumes of sleep light. 4.1 Note
Standard light according to the problem of light logarithmic range: -3.~+1.unit 4.2 Total uncertainty
The total uncertainty of the two photosensitive instruments is 0, which is the same as the standard. 4.3 Calibration method
The calibration of the standard photosensitive instrument is divided into steps. First, calibrate each part separately, and then compare them together.
, calibrate each basic component separately: calibrate the basic components of the standard photosensitive instrument, such as the photosensitive element, filter, and gate, and then calibrate them separately. After all are qualified, the components are debugged according to the results and usage requirements. The slow light comparison technician points out: After the tested photosensitive instrument is tested, the same film is exposed on the tested photosensitive instrument and the reference light scene, and then the color, fixing, washing and other processing are carried out under the same conditions. After drying, the two stream characteristics are respectively displayed on the same graph. For comparison,
3 working metering instruments
5 working photosensitive instrument Xingsheng light material production, position processing and scientific research work with trial meter limiter
5, [Entertainment light grab range
1 work i photosensitive instrument noise light monitoring logarithmic range, -3,00 ~ +1,6 single this. 5,2 total generation tolerance
total charge and discharge constant. For 00518 single release. 5.3 calibration method
working photosensitive instrument false adjustment can be used for light comparison, but, the data of the night group does not necessarily meet the requirements of the national and international standards, the actual stock has a certain design to select the calibration. After the standard photosensitive instrument is debugged, the standard working photosensitive instrument and the standard photosensitive instrument are respectively tested for noise light, and the development, panning, and statistical 3JG are carried out under the same time. 2533—89
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