GB/T 33869-2017 in English
VALIDComparison method for absolute pyrheliometer
- Issued on:2017-07-12
- Implemented on:2018-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 33869-2017绝对直接辐射表比对方法》由TC507（全国气象仪器与观测方法标准化技术委员会）归口，主管部门为中国气象局。
Introduction
Introduction
GB/T 33869-2017 "Comparison Method of Absolute Direct Pyrheliometers" was proposed by the China Meteorological Administration to standardize the comparison conditions, methods and result processing of absolute direct pyrheliometers. This standard is applicable to the calibration and verification of solar radiation measuring instruments in the fields of meteorological observation and solar energy utilization.
Comparative Analysis of Standard Frameworks
| Standard Dimensions | GB/T 33869—2017 | JGJ 456—1992 | ISO 9060-1990 |
|---|---|---|---|
| Scope of Application | Comparison Method of Absolute Direct Pyrheliometers | Verification Procedure of Direct Pyrheliometers | Specifications for Solar Energy Measurement Instruments |
| Core Requirements | Environmental Condition Control, Data Processing Methods | Calibration Period and Error Calculation | International Classification of Radiation Measurement |
| Technical indicators | Uncertainty≤0.3%, tracking error≤0.25° | Accuracy classification | Radiation classification standard |
Terminology explanation and practical application cases
Absolute cavity pyrheliometer is a high-precision measuring instrument that uses the electrical substitution method for self-calibration. It has two types: active and passive. For example, in clear weather conditions, the solar irradiance value is obtained by alternating light blocking and exposure measurements.
Compensated pyrheliometer uses the principle of alternating measurement of left and right receivers to eliminate environmental interference factors. In practical applications, its data processing needs to be combined with formula (3) to calculate irradiance.
Standard formulation background and technology evolution analysis
GB/T 33869-2017 was formulated based on the development needs of radiation measurement technology at home and abroad, especially in the field of global climate change research and renewable energy development. This standard combines the technical framework of ISO 9060-1990 and refers to the World Meteorological Organization (WMO) Observation Method Guide, reflecting the international leading level.
Implementation suggestions
- Laboratory construction:It is recommended to equip at least 3 different types of cavity-type absolute direct pyrheliometers to ensure that the comparison conditions meet the standard requirements.
- Staff training:Strengthen the ability of technical personnel to operate instruments under complex meteorological conditions and regularly participate in international technical exchanges.
- Data management:Establish a long-term radiation measurement database to facilitate subsequent analysis and research.
- Equipment maintenance:Strictly calibrate and maintain instruments in accordance with standard requirements, especially the tracking accuracy of the sun tracker.
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