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河南省地震局地震研究所应力应变研究室研制的ZX—79型弦频钻孔应变仪于1979年10月正式投入观测。传感器埋设深度16石8米。仪器下井之前,初步率定线应变灵敏度在10’量级。现将该仪器的主要技术指标列于表1。
Henan Province Seismological Bureau Institute of seismic stress and strain developed by the ZX-79-type cable drill strain gauge in October 1979 formally put into observation. Sensor buried depth of 16 stone 8 meters. Before the instrument went down, the initial rate of alignment strain sensitivity in the 10 ’order of magnitude. Now the main technical indicators of the instrument are shown in Table 1.