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启动和停止时间的检测SN338数字地震仪磁带机的启动和停止时间按要求带速小于80英寸/秒时应小于250ms,带速小于40英寸/秒时应小于160ms。用来检测这个时间的方法都是采用示波器,但在示波器上观察这个时间却是很困难的,因为小于250ms 和160ms 的时间,光点一闪即过,因而不能正确确定启动和停止时间。为了解决这个矛盾,可采用静电照相显示仪记录,从检流计的光点显示来读取这个时间。
Start and stop time detection SN338 digital seismograph tape drive start-up and stop time less than 80ms / second with a speed of less than 250ms, with a speed of less than 40 inches / second should be less than 160ms. The methods used to detect this time are oscilloscopes, but observing this time on an oscilloscope can be difficult because less than 250ms and 160ms of time, the flash of light flashes, and the start and stop times can not be determined correctly. In order to solve this conflict, the electrophotographic display can be used to record the current from the galvanometer display to read this time.