露点仪冷镜表面拉乌尔效应及清洁方法  

Hygrometer Mirror Surface Raoul Effect and Cleaning Method

作　　者：万浩涵 杨永军[1] 

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2017年第6期45-47,共3页Metrology & Measurement Technology

摘　　要：露点仪测量气体湿度过程中,拉乌尔效应对测量准确性影响很大。使用测量凝结物冰点值估算拉乌尔效应影响值,发现在冷镜表面滴入酒精吹扫并加热蒸发残留酒精清洁表面,可以大大减少拉乌尔效应影响。通过实验可以减少拉乌尔效应露点误差到0.1℃以下。The Raoul effect makes a great influence on the accuracy of measuring dew point of gas using a hygrometer. When estimating the Raoul effect by measuring condensate freezing point, we found drops of alcohol on the cold mirror for blowing and heating evaporation residue al-cohol to clean the surface can greatly reduce the Raoul effect. It can reduce the Raoul effect5 s error of dew point temperature to less than 0. 1%.

关 键 词：露点仪 拉乌尔效应 清洁镜面 酒精 吹扫 

分 类 号：TH811[机械工程—仪器科学与技术]