气相色谱仪自动调零的分析研究

The Research About GC′s Auto-zero Function

介绍目前常见的气相色谱仪零点漂移的原因和处理方法。在分析手动调零原理的基础上提出了自动调零方法。利用数模转换芯片AD7237对被测信号在运放中进行补偿,实现了自动调零,并讨论了该方法存在的效应。

The Common treatments about GC＇s zero drift are introduced briefly. An auto-zero method of GC is presented on the basis of the manual tune. In the Operational Amplifier, the measured signal is compensated with analog signal, which is generated by the digital-to-analog convener chip AD7237. Then the auto-zero is realized by the method.