| 摘要 |
PURPOSE:To obtain a residual chlorine measuring apparatus which achieves automation of calibration work without impairing certainty of the calibration of a display value concerning the residual chlorine measuring apparatus. CONSTITUTION:This apparatus is provided with a stock liquid tank 1 holding a sodium hypochloride stock liquid S, a weighing tank 2 which houses a diluted water W desalted by a fixed amount and a weighing cock 3 adapted to weigh the sodium hypochloride stock liquid S of the stock liquid tank 1 by a fixed amount. Moreover, a dilution tank 4 in which a specified amount of the sodium hypochloride stock liquid S weighed with the weighing cock 3 is diluted by the dilution water W of the weighing tank 2 and stored as a calibration liquid C with a specified value of concentration of the sodium hypochloride is provided and a residual chlorine gauge 5 is provided for calibration with the concentration of the sodium hypochloride of the calibration liquid C as reference concentration. |
