中文摘要：

为提高冻干机的测温精度，本文采用PCL-818HG数据采集卡和T型热电偶，在VisualBasic6．0环境下搭建测温平台并利用此系统进行了猕猴桃冷冻干燥实验。该平台可以多通道同时采集数据并且通过界面图形输出能够实时观察温度变化，经过恒温油槽标定后。最后测温误差保证在±0．2℃范围内。实验结果表明该测温系统相比原有冷冻干燥机的测温装置更加精确、可靠。

英文摘要：

To enhance the accuracy of temperature measurement in freezing-drier, this paper introduces a temperature measuring platform which is based on PCL-818HG and thermocouple （T type） with Visual Basic 6.0. The experiment of freeze-drying kiwifruit is carried on. The data is simultaneously acquired from the multi channel access and put into Excel table .The trend of temperature is shown by graph. The error allowance will be consequently within ＋0.2℃ with the Constant Temperature Oil Baths calibrating. The experimental results elaborate that the plat- form is more accurate and reliable than the old temperature measuring device in freeze-drying machine.