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本文介绍了基于高聚物膜渗透原理而建立的外渗式水渗透管微量水发生装置。当载气流量恒定在1200mL/min、压力恒定在196kPa,而恒温槽的温度在(35～80)℃变化时,能发生水蒸气含量为(50～2000)ppmγ的气体。用重量湿度计定值,单点不确定度为±1.0％;宽范围为±3.0％。用精密露点温度计定值,宽范围不确定度为±4.0％。该装置已列入温度检定系统,作为湿度标准计量器具。
In this paper, an extravasated water permeation tube micro-water generator based on the principle of polymer membrane infiltration is introduced. A gas having a water vapor content of (50-2000) ppm γ occurs when the carrier gas flow rate is constant at 1200 mL / min, the pressure is constant at 196 kPa, and the temperature of the thermostatic chamber varies from (35 to 80) ° C. With a weight hygrometer set point uncertainty of ± 1.0%; wide range of ± 3.0%. With a precision dew point thermometer, a wide range of uncertainty is ± 4.0%. The device has been included in the temperature test system, as a standard humidity measuring instruments.