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1.前言工业部门中的最新发展对湿度测量仪器提出了越来越高的要求。人们需要一种可直接或间接溯源量值到 NBS 的便携式传递标准器。露点测量法是湿度测量的基本方法,因为冷凝时的温度在恒定压力下是载气中水蒸气浓度的固
1. INTRODUCTION The latest developments in the industrial sector place increasing demands on moisture measuring instruments. People need a portable delivery standard that can directly or indirectly trace the amount to the NBS. Dew point measurement is the basic method of humidity measurement, because the condensation temperature is a constant pressure at a fixed concentration of water vapor in the carrier gas