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通过对安装在宁波地震台ＺＫ０３井上的ＳＤ３型自动测氡仪一年多来的观测试验和调试，设计出适合于观测小流量自流井的该仪器探集气室装置。即用２０ｃｍ不锈钢高压锅作集气室，并把集气室内的进出水口制作成一高一底、一小一大的两个平行液面，并使出水畅通。经使用测试数据完全能达到《规范》要求，与手工观测仪器测试结果比较同步性好，反映地震能力强，完全可以替代现有的手工观测仪器，而作为正式入网观测仪器推广应用。
By observing and testing the SD3 automatic radon monitoring instrument installed on the ZK03 well above the Ningbo Seismic Station for more than one year, this instrument collecting chamber device suitable for observing smallflow artesian wells has been designed. That is 20cm stainless steel autoclave as the plenum chamber, and the collection chamber into the outlet into a high and one bottom, a small one large two parallel liquid surface, and the water flow. By using the test data can fully meet the “norms” requirements, compared with the manual observational instrument test results show good synchronization, reflecting the strong seismic capability, can replace the existing manual observation instruments, and as a formal application of the network observation instruments.