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我国引进的数字地震仪绝大部分均配用 ERC—10静电示波仪,而且这种仪器的记录纸基本上均靠进口。因此,为了节省记录纸,很多人认为应该在仪器上想办法。现已有三种方法。第一、二种方法是在示波仪启动时加以延时,如 SN338,示波仪的启动超前于数据约1.25秒(包括头段准备中的400ms 和头段数据段间隙850ms),所以可以延时1秒左右,这样一炮记录就可以省出1秒的记录纸。第一种方法是将延时电路加在B 箱体示波仪启动指令 BMC 之后;第二种方法是将其加在示波仪里,即 B 箱体
The vast majority of digital seismographs introduced in China are equipped with ERC-10 electrostatic oscilloscope, and the recording paper of such instruments are basically imported. Therefore, in order to save the recording paper, many people think that we should find a solution on the instrument. There are three ways. The first and second methods are to delay the oscilloscope start-up, such as SN338, the oscilloscope start ahead of the data about 1.25 seconds (including the preparation of the first section of the 400ms and the first data segment gap 850ms), so Delay about 1 second, so that a record can save 1 second recording paper. The first method is to delay circuit plus B box Oscilloscope start command BMC; the second method is to add it in the oscilloscope, the B box