新型双通道卡尔费休微量水分测定仪的研制

Development of a kind of two-channel karl fischer instrument for measuring trace water

基于卡尔费休微量水分测定的基本原理,结合当今两种基本卡尔费休水分测定的方法:库仑法和容量法,以MSP430F2617新型处理器芯片为核心设计了一种双通道同时在线测量的微量水分测定仪,实现了一个系统中集成两种测量方法,扩展了仪器使用的灵活性。文中阐述了仪器双通道的设计方案,部分硬件电路,精度保证措施以及对仪器精度和性能的验证方法。

Taking MSP430F2617 as the core,combined with the two commonly used Karl Fischer＇s method： coulomb method and volumetric method,an instrument for measuring trace water has been designed so that we implement a system integrates two measuring methods.The design method,the circuit,the precision guarantee measures and the experiment are given in this paper.