| 摘要 |
PURPOSE:To make it possible to simply measure concn. in a real time, by providing functions for respectively performing the linearization of the characteristic of a sensor probe, the correction of temp. and the correction of the sensitivity of the sensor probe in a real time to a multicomponent concn. measuring device. CONSTITUTION:For example, the measuring signal obtained by an amplifier 1 is inputted to a sample holding circuit SH1 and the light quantity monitor signal obtained by an amplifier A2 is inputted to a sample holding circuit SH4 and both signals are inputted to a microcomputer 11 to correct the variation in the quantity of light from a light source L1. The same operation is performed with respect to light sources L2, L3. Next, interruption is applied by an interruption switch SW for setting sensitivity correction coefficient and the correction of the sensitivity of a refractive index measuring probe 1 is performed using the correction value previously calculated. Subsequently, the linearization of the characteristic of the probe is calibrated using the output after the correction of sensitivity. Further, the correction of the temp. of a measuring medium 9 is performed using the temp. measured by a thermister 12. Next, the concn. of the medium 9 is calculated in a real time using each value calculated as mentioned above in the microcomputer 11.
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