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標題Title: SETUP OF AN AUTOMATIC SYSTEM FOR LOW-TEMPERATURE
作者Authors: 林開政,Trinh Ngoc Chau..等
上傳單位Department: 機械工程系
上傳時間Date: 2010-6-30
上傳者Author: 林開政
審核單位Department: 機械工程系
審核老師Teacher: 林開政
檔案類型Categories: 論文Thesis
關鍵詞Keyword: specific heat, resistance
摘要Abstract: We set up an automatic resistance and specific heat capacity
measurement system with temperature range from 10 ~ 325
K. The versatile adapter in the cold head of the closed-cycle
refrigerator is flexible for changing different sample holders
to measure resistance or heat capacity of the sample in a
very short time. The resistance measurement sample holder
with pin contact can be operated without using paste
material to make electric contact. Changing bulk sample
will take only a few minutes. The built-in PID function
inside a temperature controller helps to maintain
temperature stability of the sample while measuring
physical properties. The automatic measurement system
works with temperature stability about 0.5% of the set
temperature. The system uses a PC to control and receive
data of all devices via RS232 interface connected to a GPIB
controller (GPIB-232CT-A).

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2010_6_0d795efa.pdf 226Kb pdf 360 99
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