| 摘要 |
<p>PURPOSE:To prevent decrease of the sensitivity resulting from ripple noises by providing a switching source apparatus for charging a secondary battery except when data is collected, and obtaining infrared spectrophotometric spectrum with using the collected digital data. CONSTITUTION:A circuit opening/closing circuit 25 is turned in the opened state when a signal 18a becomes H level, whereas it is rendered in the closed state when the signal 18a becomes L level. Therefore, the opening/closing circuit 25 and a main body 26 of a power source apparatus constitute a switching source apparatus 27 for charging a secondary battery 24 except the time DELTAT when a data collecting part 15 collects digital data 13a. During the time DELTAT while the collecting part 15 collects the data 13a, since the signal 18a is in the H level, an analog circuit part 10 is supplied with power from the battery 24 separated from the main body 26, thereby turning the signal 18a to the L level. In consequence, when the collecting part 15 comes not to collect the data 13a, the battery 24 is charged by the apparatus 27. Accordingly, ripple noises are not found in a direct current constant voltage 24a of a spectrophotometer 28 supplied to the circuit part 10 during the time DELTAT.</p> |
