地磁気観測所｜刊行物｜地磁気観測所テクニカルレポート別冊｜第2巻

ホーム > 刊行物 > 地磁気観測所テクニカルレポート別冊 > 第2巻 >On the accuracy of flux-gate magnetometers - Calibration Experiment -

Translated to English from paper in Japanese, originally published in: Memoirs of the Kakioka Magnetic Observatory, Vol.24, No.1, pp.1-13, 1990 with permission of the authers.

On the accuracy of flux-gate magnetometers
　　　　　- Calibration Experiment -

Katsuharu Koike, Shinzaburo Nakajima, and Yukihiro Shimizu

Abstract

   We examined the efficiency of the flux-gate magnetometers, MB-160 and MB-162, Shimadzu, which we use for 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:

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 within an accuracy of 0.1%.
When we use the flux-gate magnetometer with the resolution of 0.1 nT, we can extend the range of the observation from ±500 nT to ±600 nT with a sufficient linearity.
The output signal for the calibration which is generated by the installed apparatus in the flux-gate magnetometer is stable. With the use of this installed apparatus, therefore, we are able to calibrate the scale value during the observation.

Received 11 Octiber 1990; Received in revised form 30 October 1990

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