三波段积分浑浊度仪的检测和校准

在兰州大学半干旱气候与环境观测站(SACOL)长期观测运行的基础上,针对测量气溶胶散射特性的三波段积分浑浊度仪(TSI3563)的校准和检测问题进行了探讨.讨论了TSI浊度仪检测和校准气体的选择,零气主要使用经高效微粒空气过滤器过滤的干净空气,标准气体主要使用CO2;总结出浊度仪零气检测和标准气体检测的理论依据,每天零气检测时,散射系数的变化范围为 ,平均值范围为 ,当超出这个范围就需要进行零点设定,每3~5d进行标准气体检测时,散射系数的平均值和理论计算值的误差超出 的范围,就需要进行全校准;最后介绍了零气校准和全校准的方法.

Check and calibration of three-wavelength integration nephelometer

Based on long-term observations at the Semi-Arid Climate Observatory and Laboratory (SACOL), check and calibration of three-wavelength integration nephelometer that measured the scattering characteristics of aerosol were discussed. The selection of checking and calibration gases was discussed, and zero gas was clean air that filtrated by high-efficiency particulate air (HEPA) filter, and calibration gas was CO2. The theory of zero and span checking was summarized, and Zero checking was done every day, and zero set was done if ranges of scattering coefficient and average values were out of and , respectively. Span check was done every 3~5days, and span calibration was done if the scattering coefficient error between average and theoretical calculation was greater than . Lastly, the method for zero and span calibration was described.