PURPOSE: To facilitate a programming by making unnecessary an operation to input manually a quantitative outcome by means of another caligration curve information, in the case of the program in which quantification is conducted by using more than two calibration curves.

CONSTITUTION: The programming is simplified by making a manual input operation unnecessary so that automatic execution may be obtained only by defining another calibration curve information to be referred to a program memory or the predetermined address of a table M, for example, an address A2 that copes with a program to conduct quantification by using more than two calibration curves. By executing processing that is in accordance with contents defined by the table M, an objective calibration curve L can be obtained.