电表改装与校正实验研究  

作　　者：王玉梅[1] 

机构地区：[1]陕西理工学院物理系,陕西汉中723003

出　　处：《黑龙江科技信息》2011年第8期7-7,共1页Heilongjiang Science and Technology Information

摘　　要：分析了电表的改装与校正实验中出现的几个问题,得出结论:正是由于待改装表头的表盘指示存在误差和导线的内阻不为零,使得用半偏法和替代法测出来的表头内阻有明显区别,使得扩程电阻的实验值和理论值有区别,自然用改装电流表的扩程电阻和改装电压表的扩程电阻计算出来的结果也有区别。This article analyzes several problems come from the experiment of ammeter＇s refitting and calibration,and had a conclution： just because the header of the dial indicates an error and the wire＇s resistance is not zero,making use of half-deflection method and alternative method to measure out significant difference between internal resistance of meter,making a difference of extending resestance between the theoretical value and the experimental value,and the results of extending resestance that come from refitting ammeter and refitting voltmeter.

关 键 词：半偏法 替代法 内阻 扩程电阻 改装电流表 改装电压表 

分 类 号：TM934.1[电气工程—电力电子与电力传动]