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standard pyranometer standard pyranometer introduction analysis standard requirements product composition standard pyranometer standard gb/t cemented carbide scopethis standard applies micro-diaphragm metering pumps calculated surface
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  2. GB/T 33704-2017 in English
GB/T 33704-2017 in English

GB/T 33704-2017 in English

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Standard pyranometer

  • Issued on:2017-05-12
  • Implemented on:2017-12-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD)： $270.00
$262.00

《GB/T 33704-2017标准总辐射表》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

Analysis of the core content of the standard

GB/T 33704-2017 specifies the technical requirements and test methods of the standard pyranometer, which mainly includes the following core elements:

Technical indicators Requirements Test methods
Sensitivity ≥7μV·W-1·m2 Appendix D Shielding/unshielding method
Directional response ±10 W·m-2 6.4.5 Multi-dimensional workbench method
Temperature response ±0.5%(50K range) Radiation sensor temperature test chamber

Detailed explanation of key technical requirements

1. Product composition

Standard pyranometer consists of four parts: sensing device, quartz ball cover, signal output terminal and structural components:

  • Sensing device: The sensing surface adopts matte black coating to ensure 300-3000nm spectrum absorption
  • Quartz ball cover: Double-layer hemispherical structure, the transmittance must meet the 50% threshold requirement
  • Protection design: IP67 protection level, can withstand -10℃~40℃ ambient temperature

2. Measurement performance

Typical case: A certain type of pyranometer has a 1.2% nonlinear error at the 750W/m2 test point. After correction by formula (6), the error is within 0.8%, which meets the standard requirements.

Implementation suggestions

Calibration cycle management

The standard stipulates that the calibration cycle is 2 years. It is recommended that:

  1. Establish an instrument sensitivity change trend file
  2. Add intermediate inspection after abnormal climatic conditions
  3. Use the cover/uncover method in Appendix D for on-site calibration

Environmental adaptability selection

According to the requirements of Appendix A, the following tests must be conducted:

  • Climatic conditions: -10℃ low temperature to 40℃ high temperature cycle
  • Mechanical conditions: 2-200Hz sinusoidal vibration

More samples: YD/T 3934-2021 JC/T 2453-2018 GB 18306-2015
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