# 직류 자력계의 제작

• Chang, Choong-Geun (Dept. of Physics, College of Natural Sciences, Chungnam National University)
• 장충근 (충남대학교 자연과학대학)
• Published : 1996.07.31

#### Abstract

In order to display magnetic signals obtained from a magneto-resistance sensor, a direct current magnetometer was designed and its circuit was constructed. The magnetic fields measured by the home-made magnetometer, which showed good functions of automatic ranging, analog output, and vector sensing, were well agreed with those by commercial MAG-01 magnetometer. The measurement range of the magnetometer was $1\;{\mu}T$ to 1.999 mT, the resolution was -132 dB within 1 Hz bandwidth and the measured magnetic fields could be displayed with $3{\cdot}1/2$-digit LED.