中心控制计算机通过光缆向水位和流速仪器发送控制指令并进行监测，实现对潮流量自动监测。

The center control computer observes the tidal discharge by sending orders to the water lever and velocity instruments through the optical fiber cable automatically.

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在监测和控制系统中，由于需要多通道的数据采样和指令输出，选择一款高性能的多功能数据采集卡是十分重要的。

To choose a good device is very important when you study monitor and automatic system. PCL-812PG is an excellent LabCard of data input and output.

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