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前言《地震台站观测规范》(试行)中在〈地磁台的建筑〉一节中要求,仪器墩子材料的磁化率要小于10~(-5)CGSM,房屋材料磁化率要小于10~(-4)CGSM。并且在附录3.2节中给出了具体的测量方法。本文根据我们实际工作中的体会,谈谈《规范》中所提出的方法在完成上述测量时所存在的困难。并根据误差公式以及该方法中所使用的 CHD 型核子旋进磁力仪的性能讨论了上述困难之所在。
Preface The Observatory of Earthquake Stations (Trial) requires that the magnetic susceptibility of the material of the instrument is less than 10 -5 CGSM, the magnetic susceptibility of the material of the building is less than 10 ~ (- 4) CGSM. And specific measurement methods are given in Appendix 3.2. This article based on our experience in actual work, to talk about the “proposed” method in the completion of the measurement of the difficulties. The above difficulties are discussed based on the error formula and the performance of the CHD nuclear precession magnetometer used in this method.