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山西省地震局地震电磁波研究组经过4年的努力,成功地研制出观测电磁脉冲计数的专用测试仪器——JMB—85A型电磁脉冲计数器,并经一年多的试记,取得了连续、可靠的观测资料.1988年11月15日,山西省地震局召集有关部门与人员对该仪器进行了鉴定,认为该仪器具整机电路简洁、设计合理、自动化程度高、显示直观、操作简便、人工工作量少、性能稳定、灵敏度高、抗干扰能力强、性能价格比高等优点.可交直流自动转换,特别适用于地震台站.该仪器所测的数据具有较明确的
Seismological Bureau of Shanxi Province Seismomagnetic Research Group after 4 years of hard work, the successful development of the observation of electromagnetic pulse counting special test equipment - JMB-85A-type electromagnetic pulse counter, and after more than a year trial, and achieved continuous, reliable November 15, 1988, Shanxi Seismological Bureau convened the relevant departments and personnel appraised the instrument, that the instrument with the whole circuit is simple, reasonable design, high degree of automation, intuitive display, easy to operate, artificial Less workload, stable performance, high sensitivity, strong anti-interference ability, high cost performance, etc. AC-DC automatic conversion, especially for seismic stations. The instrument measured data has a more specific