| 摘要 |
PURPOSE:To make possible the detailed grasping of a radiation circumstance and an exposure status by obtaining an integration value of a radiation dose in the area beyond a set radiation dose and times for integration corresponding to the analysis. CONSTITUTION:A signal from a radiation detector 1 is supplied to a selection circuit 4. When a radiation value or an exposure value are beyond a selection level 12 prestored by the circuit 4, an output from the circuit 4 is integrated by an integrating meter 5 and at the same time, a time is integrated by an integrating meter 6. After this process, when the radiation value is below the level 12, the integrating meters 5, 6 stop an integrating operation. Through repetition of this action, the total T1+T2 of an integrated time and the total 11A+11B of integrated value are indicated on indicators 8, 7 respectively.
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