环境试验设备温度校准结果的测量不确定度评定

Measurement Uncertainty Evaluation of Temperature Calibration Results of Environmental Test Equipment

环境试验设备温度参数一般包含温度偏差、温度波动度、温度均匀度。校准时,应分别给出这三个测量结果的扩展不确定度。然而,几乎所有的计量校准机构在提供给客户的校准证书上仅仅体现了温度偏差的扩展不确定度,忽视了温度波动度、温度均匀度的扩展不确定度。对于温场设备而言,波动性和均匀性的性能指标十分关键。因此,在校准过程中,应给出全面的测量不确定度。文章给出了一个环境试验设备温度全参数的不确定度评定实例,从而为实际工作中的不确定度评定提供有价值的参考。

The temperature parameters of environmental test equipment generally include temperature deviation,temperature fluctuation and temperature uniformity.During calibration,the extended uncertainties of these three measurement results should be given separately.However,almost all metrology calibration institutions only reflect the extended uncertainty of temperature deviation on the calibration certificate provided to customers,ignoring the extended uncertainty of temperature fluctuation and temperature uniformity.For temperature field equipment,the performance indicators of volatility and uniformity are very critical.Therefore,a comprehensive measurement uncertainty should be given during the calibration process.This paper gives an example of uncertainty evaluation for all parameters of environmental test equipment temperature,so as to provide a valuable reference for uncertainty evaluation in actual work.