介绍了用自平衡比较仪通过自校、加法、比较和乘法等校准线路实现直流大电流量值的绝对溯源。
It can be obtained the trace to the source of large direct current with self-balancing DC comparator through self-calibration circuit, addition circuit, compare circuit and multiplication circuit etc.
该便携式湿度发生器利用分流法湿度发生原理，采用微控制器和质量流量控制技术实现了自动发生不同流量、不同露点气体的功能，可为露点测试仪检定和校准提供动态标准湿度气体。
The portable humidity generator had the function of automatic generating standard gas of different flow and dewpoint by using the microprocessor and the technology of mass flow controlling.
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