| 摘要 |
PURPOSE:To simplify the measuring equipment and method while reducing cost by sucking the air from the bottom of a sample liquid tank, bubbling the sample water to remove ozone, and then adjusting zero point using the sample water. CONSTITUTION:When a sequencer 20 delivers a command of zero adjusting mode, an air pressure feed pump 13 is driven to open a solenoid valve 15 thus feeding the air to an air blowing unit 10. Consequently, multiple bubbles are generated from the bottom of a sample liquid tank 4 thus discharging ozone contained in the sample liquid (chlorine is not discharged). Ozone can be discharged sufficiently even if bubbling is performed while feeding the sample liquid. Zero adjusting is performed when the sample liquid in a measuring tank 1 is replaced sufficiently. Upon finish of zero adjusting, the valve 15 is closed and the sample liquid containing ozone and chlorine is fed to the measuring tank 1 and normal measurement is performed when the liquid in the measuring tank 1 is replaced. The operation can be carried out manually without using the sequencer 20. |
