本文提出了基于沃尔什函数的模数转换器（ADC）位检定方法。
Methods based on Walsh Function for calibrating analog-to-digital convert-ers(ADCs) at the bit level are presented in this paper.
定点液位测量提高了流量标准装置的工作效率，能够使流量标准装置直接检定腐蚀性液体流量计，并且可以实现校准过程的自动化、数据的自动采集和自动化管理。
The adjusting of flow meter is automatic when the method of measuring fixed-point liquid level is used on liquid flow calibration facility, and the data can be gathered and processed automatically.
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