一、产品特点：
◎真有效值测量、整四位显示
◎三排LED同时显示A、B、C三相电压或电流
◎软件调校、内部无电位器（精度高、稳定性好、长期工作免调校）
◎可编程通过面板按键任意调节显示值1~9999
◎可选带通讯功能、通讯地址、波特率
◎可选带上下限报警控制功能
主要产品：
YDJ3-AA0.2, YDJ3-AA2, YDJ3-AA20, YDJ3-AA50, YDJ3-AA100,
YDJ3-AA150, YDJ3-AA200, YDJ3-AA500, YDJ3-AA1000, YDJ3-AA1500, YDJ3-AA2000, YDJ3-DA0.0002, YDJ3-DA0.002, YDJ3-DA0.02, YDJ3-DA0.2, YDJ3-DA2, YDJ3-DA20, YDJ3-DA30, YDJ3-DA50, YDJ3-DA100, YDJ3-DA150, YDJ3-DA200, YDJ3-DA300, YDJ3-DA500, YDJ3-DA1000, YDJ3-DA1500, YDJ3-DA2000,
YDJ3-AA,YDJ3-DA, YDJ3-AV, YDJ3-DV, YDJ3-W, YDJ3-Q