ON THE ACCURACY OF FLUX-GATE MAGNETOMETERS -Experiment of the Calibration-
Koike, K., Nakajima, S., Shimizu, Y.
Abstract
We examined the efficiency of the flux-gate magnetometer, MB-160 and MB-162, Shimadzu, which we use for the variation observation at the Kakioka Magnetic Observatory. We also examined our method and the equipment for the calibration of the installed calibration apparatus in the flux-gate magnetometer.
On the basis of examinations, we obtained the following conclusions.
1. Using our equipment for the calibration at Kakioka, which is composed of mainly one set of 3-axial Helmholtz coil, we can calibrate the installed calibration apparatus in an accuracy of 0.1%.
2. In the case where we use the flux-gate magnetometer with the resolution of 0.1 nT, we can extend the range of the observation from 土500nT to 士600nT with a sufficient linearity.
3. The output signal for the calibration which is generated by the installed apparatus in the f1ux-gate magnetometer is stable. With the use of this installed apparatus, therefore, we are able to calibrate the scale value during the observation.
