微机运控低温热容测定装置的建立

The Set up of Computer Control Measuring Instrument for Low Temperature Heat Capacity

本文介绍了在80～400K 精密自动绝热量热计的基础上引入微机,用于量热试验全过程自动控制的方法。包括温度、电能的自动测试、数据处理及结果打印,也可进行人机对话,选择实验条件和参数调整。经过二年实验考察表明,装置性能稳定可靠,α-Al_2O_3的标定结果表明,其测试精度为±0.34%,准确度为±0.9%。

A whole process automatic control system for measuring heat capacity is introduced inthis paper.It contains a 80～400K precise automatic adiabatic calorimeter and amicrocomputer.Temperature,electric energy etc.can be collected and delt with and re-ported automatically by the system.It also can make dialogues between human and ma-chine and select experimental conditions and suitable parameters.The two years'test indi-cated that the instrument is reliable.The result of calibration for α-Al_2O_3 shows that itsprecision is±0.34% and accuracy±0.9%.