水势测定仪操作方法研究  

Instrumental Analysis Study into Water Potential

作　　者：泮进明[1] 张颖萍[2] 苗香雯[1] 

机构地区：[1]浙江大学 [2]中国计量学院

出　　处：《电子测量与仪器学报》2004年第4期57-62,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金 (5 0 1 75 1 0 1 )资助项目

摘　　要：采用美国Wescor公司生产的植物及土壤水势测定仪在水势测定过程中 ,常会碰到一些仪器操作上的问题 ,针对这些问题设计了相应的测试过程 ,并运用HR -3 3T露点微伏压计、C -5 2样品室和PS -1 0湿度计干湿计切换盒对 2 5℃不同浓度的标准氯化钠溶液的水势进行测定试验研究 ,试验的测定结果与标准氯化钠溶液水势的真实值进行比较分析 ,提出了该仪器设备水势测量操作上的几点经验性建议。There are several problems in operation to measure w ater potential wit h plant&soil water potential instrument which is produced by Wescor Corporation in USA. In order to solve these problems we project a test process. At 25℃ wate r potentials of NaCl solutions of different molality are measured and studied wi th HR-33T microvoltmeter, C-52 sample chamber and PS-10 psychrometer/hygrometer switchbox manufactured by Wescor corporation in USA, and the measurement results are compared with factual value of water potential of NaCl solution. Some exper ience suggestions are put forward on operation of that instrument.

关 键 词：水势测定仪 操作方法 热电偶干湿球湿度计 露点 

分 类 号：TH81[机械工程—仪器科学与技术]