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发明名称
用换位支路法进行二量程变换的直流电位差计
摘要
一种可对电压进行测量用换位支路法进行二量程变换的直流电位差计,在测量盘电阻电路中串联一个电阻后,使它总阻等于一位数乘10的整数次幂的电阻值,这时,二个用于量程变换的电阻也成为一位数或二位数乘10的整数次幂,使得电阻测量时可以用标准电阻或过渡标准电阻进行对比,从而测量准确度得到提高,保证了直流电位差计有准确的量程比。
申请公布号
CN2864691Y
申请公布日期
2007.01.31
申请号
CN200520115380.X
申请日期
2005.07.30
申请人
骆乃光
发明人
骆乃光
分类号
G01R17/20(2006.01)
主分类号
G01R17/20(2006.01)
代理机构
代理人
主权项
1、一种用换位支路法进行二量程变换的直流电位差计,它由调节工作电流大小的可调电阻RP,固定电源压降的电阻Ro,调定电阻RN及有二个量程可变换的测量电路串联而成;其特征在于测量盘总电阻串联一个电阻后,成一个阻值是一位数乘10的整数次幂的新总电阻,二个量程转换用电阻中一个与新总电阻阻值相同,与测量盘新总电阻并联在电位差计正端,另一端连接了另一个阻值是新总电阻的量程系数减一倍的电阻与量程转换开关低量限触点相连,是新总电阻量程系数减一倍的电阻与新总电阻连接在量程转换开关高量限触点上。
地址
311404浙江省富阳市新登镇葛溪南路26号
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