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目前水文测验中使用的计数器,大致可分机械、电磁和数码管计数器等几种。无论那一种在使用上都有一定的缺点,如机械计数器和电磁计数器,常因加工工艺不够精密,故障较多,响应速度又慢;数码管计数器造价高,处理抗干扰困难等。随着计算器生产的迅速发展,目前国内市场供应日多,容易买到;只须购买一般简易的计算器,经过简单的改装,就能成为水文测验中使用的一种计数器,不但可以作为测速
The current hydrological test counter used, can be divided into several kinds of mechanical, electromagnetic and digital tube counter. No matter what kind of use has some shortcomings, such as mechanical counters and electromagnetic counters, often due to the processing technology is not sophisticated enough, more failures, the response speed and slow; digital tube counter high cost, dealing with anti-interference difficulties. With the rapid development of calculator production, the current domestic market supply more and more easy to buy; simply buy a simple calculator, after a simple modification, can become a hydrological test using a counter, not only as a speed