| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively and accurately calibrate radiometers when calibrating a large number of UV radiometers in parallel. SOLUTION: When measuring a UV radiant quantity of the natural light in parallel by the large number of UV radiometers 10 for calibrating a fluctuation in sensitivity of an ultraviolet ray receiving element 14 of the large number of UV radiometers 10, an instantaneous value of the UV radiant quantity inputted to a CPU 20 via an integrating circuit 22, and an A/D converter 20 from the ultraviolet ray receiving element 14 is integrated over a prescribed time (for example, for five minutes), and a UV radiant quantity value obtained by integration is repeatedly stored in a memory 34. After finishing measurement, a sensitivity constant is respectively arithmetically operated by respectively reading out the UV radiant quantity value from the memory 34 of the individual UV radiometers 10, and the arithmetically operated sensitivity constant is set in the individual UV radiometers 10. COPYRIGHT: (C)2003,JPO
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