数字电压表是诸多数字化仪表的核心与基础，电压表的数字化是将连续的模拟量如直流电压转换成不连续的离散的数字形式并加以显示，这有别于传统的以指针加刻度盘进行读数的方法，避免了读数的误差和视觉疲劳。目前数字万用表的内部核心部件是A/D转换器，转换器的精度很大程度上影响着数字万用表的准确度.-Digital voltmeter is the core of many digital instrument with the digital voltmeter based, is a analog quan

A multimeter or a multitester, also known as a VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter may include features such as the ability to measure voltage, curr