| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive ion-measuring apparatus that has a fan for taking in air, a pair of collection plates for collecting an ion contained in the air, and an electronic circuit for measuring an ion current that is taken in the collector plates, is easily operated, and can accurately carry out measurement. SOLUTION: A pair of collector plates 11 and 11 is provided, where each of the collector plates 11 and 11 is composed of at least two out of plates 11b, 11c, 11c, and 11b. Additionally, an electronic circuit has integrators 21P and 21N for integrating ion charge that is taken in the collector plates 11 and 11, automatic zero point correction circuits 22P and 22N for resetting the ion charge that is collected to the integrators 21P and 21N to an initial state, measurement value correction circuits 24P and 24N for correcting the value of measured plus and minus ions, and the like. COPYRIGHT: (C)2003,JPO
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