| 摘要 |
PURPOSE:To evade the influence of noise, to take counter measures for compensating a defective measurement, and to improve measurement precision by stopping the measuring function of a dosimeter right before an alarm operates. CONSTITUTION:A measurement signal from a detection part 1 is inputted to the microcomputer 8 for the dosimeter through I/O4, and cpu5 performs specific arithmetic to store the result in RAM7. When the measured value exceeds a set value, cpu5 generates a count stop signal ST and closes a gate circuit 2 to stop measuring operation temporarily, and an operation signal AL which is delayed t1sec behind the leading edge of the signal ST is supplied to the alarm 3. The time up to the complete closure of the gate circuit 2 is secured by the time t1 and malfunction due to a noise is prevented. Measurement times R1, R2... equal to warning times of warnings P3, P4... from the completion of the warning operation are provided to take measurements, and the obtained measured values are doubled by the microcomputer 8 to compensate a defective measurement in the warning operation. |
