Computer controls to open or close each valves to container according to procedure and registers begin time and end time when liquid level reaches controlled level. Then, computer calculates percentage of water and average output of oil from a well .

• 计算机按程序控制打开和关闭通向量油容器的阀门 ,自动控制进液和排液 ,记录容器内液体到达控制液位的时间 ,并计算出含水率和油井每天的平均产量和累计产量 ;