矿山机械秒标价格 矿用机械秒表 矿用秒表

 矿山机械秒标价格 矿用机械秒表 矿用秒表

机械秒表简称秒表，它分为单针和双针两种。单针式秒表只能测量一个过程所经历的时段，双针式秒表能分别测量两个同时开始不同时结束的过程所经历的时间。图所示的秒表是一种单针式秒表。

机械秒表分为内外两个刻度盘，内盘每格是30秒，外盘一周是30秒，只要将两个读数加起来即可。

先看小表盘，小表盘的量程是15分，分度值是30秒。前半量表示0-30秒，后半量表示31-60秒。前半量对应的大表盘的读数黑色数字2-4-6-8-10-12-14-16-18-20-22-24-26-28-30，而后半量的读数对应红色数字31-33-35-37-39-41-43-45-47-49-51-53-55-57-59。大表盘的分度值是0.1秒。

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