Interpretation of JJF 2046—2023 Calibration Specification for Standard Neutral Filters for Automobile Inspection Equipment
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Citation
江涛 (Jiāng Tāo). (2023). JJF 2046—2023《汽车检测设备用标准中性滤光片校准规范》解读 (Jiědú - Interpretation of JJF 2046—2023 Calibration Specification for Standard Neutral Filters for Automobile Inspection Equipment). 中国计量 (Zhōngguó Jìliàng) [China Metrology], 2023(10), 43-45.
Keywords
- 标准中性滤光片 / Standard neutral filter
- 汽车检测设备 / Automobile inspection equipment
- 透射式烟度计 / Transmittance smoke meter
- 汽车用透光率计 / Automobile transmittance meter
- 校准规范释义 / Interpretation of calibration specification
- 明视觉函数 / Photopic vision function
- 透射比 / Transmittance ratio
- 吸收比 / Absorptance ratio
- 滤光片透射比正反面差值 / Front-back difference in filter transmittance ratio
- 不均匀性 / Non-uniformity
Brief
This article explains the JJF 2046—2023 Calibration Specification for Standard Neutral Filters used in automobile inspection equipment like smoke meters and transmittance meters, highlighting its background, scope, technical requirements (including calibration based on the human eye's photopic vision), calibration environment, and methods to ensure accurate measurements.
Summary
This article summarizes the new JJF 2046—2023《汽车检测设备用标准中性滤光片校准规范》, which is crucial for ensuring the accuracy of standard neutral filters used to calibrate transmittance smoke meters and automobile transmittance meters. The specification mandates that the calibration of these filters must be weighted according to the human eye's photopic vision, and introduces new technical requirements for filter transmittance ratio front-back difference and non-uniformity. The article also discusses the calibration environment and methods using spectrophotometers, emphasizing the importance of cleanliness and avoiding corrosive gases. This new standard fills a gap in China's metrology technical specifications by providing a method for calibrating these filters based on the human eye's visual response.
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