| 摘要 |
A counter for effectively counting events when the rate of occurrence is relatively constant. The user operates a first button (S) in accordance with the occurrence of an event. The user only have to initially perform this operation a predetermined times n (e.g., five times). A calculating unit divides the time t required to count the predetermined times n by the predetermined times n to obtain the average count time interval DELTA tm=t/n. Thereafter the time measured by the counter is converted to a count value by using the average count time interval DELTA tm and displays it. As a result, the user is not required to operate the button (S) any longer after teaching the predetermined times n, and the counter continues to automatically count the events.
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