| 摘要 |
PURPOSE:To easily calibrate all of measuring sensors by simple constitution in a water quality checker having two or more kinds of measuring sensors containing a dissolved oxygen measuring sensor. CONSTITUTION:When a measuring sensor is immersed in the standard solution 12 within a calibration container 5 to be calibrated, a dissolved oxygen measuring sensor 10 is isolated by the partition wall part 5a formed to the calibration container 5 to be positioned outside the calibration container 5 and the other measuring sensor is immersed in the standard solution within the calibration container 5 and only the dissolved oxygen measuring sensor 10 is in the atmosphere being standard gas for calibration to simultaneously calibrate all of the measuring sensors. The sensing part of the dissolved oxygen measuring sensor is arranged at a position near to a sensor part main body 6 as compared with the sensing part of the other measuring sensor and, at the time of calibration, the height of the sensor part main body is adjusted so that the sensing part of the dissolved oxygen measuring sensor is set to height not immersed in the standard solution and the sensing part of the other measuring sensor is set to the height entirely immersed in the standard solution to expose only the dissolved oxygen measuring sensor to the atmosphere. |
