| 摘要 |
PURPOSE:To control the concentration of a solution and the liquid level height of a dissolving tank by comparing the values detected by a concentration detector and a liquid level detector with the prescribed target value respectively. CONSTITUTION:A pump 3 feeds the stock solution 2 to a dissolving tank 4, and a pump 7 feeds water 6 to the tank 4 respectively. The solution 2 and the water 6 are stirred together by a stirrer 8. Then the concentration of the solution is detected by a concentration detector 9 via the conductivity of the solution, and the level of the solution is detected by a liquid level detector 10. A controller 11 controls the concentration and the liquid level of the solution based on the values obtained by both detectors 9 and 10 as well as the target value set previously. |
