关键词: 地磁场, 测量, 励磁电流, 电子比荷测试仪, 数字万用表

Abstract: The horizontal and perpendicular components of geomagnetic field, namely, the magnitude and direction of geomagnetic field are measured by using electron charge-mass ratio testing instrument with digital universal meter measuring the magnitude of current and employing positive-going and reverse exciting current focusing method.

Key words: geomagnetic field, measurement, exciting current, electron charge-mass ratio testing instrument, digital universal meter