闭环反馈采用PID这种最广泛使用的控制规律，以保证放大倍数的稳定。
Closed loop feedback adopts PID control rule to insure the stabilization of magnification times.
系统在高浓缩倍数运行条件下，采用自动化控制，是实现循环水系统的水质稳定控制的有效保证。
Automatic controlling is the effective assurance on the condition of high concentration factor. Monitor the fluctuation of water quality and dose in time.
其浮点放大器根据输入信号范围，放大适当的倍数，保证了数据采集系统的动态测量范围；
According to input signal range, the float-point amplifier enlarges suitable multiples to ensure the dynamic extension;
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