Stop watch is a kind of watch with low-frequency balanced vibration system, which provides energy through clockwork and anchor escapement. The gear system drives the hands to display minutes and seconds, and it is equipped with a special start-stop mechanism.

Small dish: there are generally 30 scales and 60 scales. A scale type of 30 indicates 0.5 minutes per grid, and a scale type of 60 indicates 1 minute per grid.

Market: Each circle of the market represents 30s, and there are 60 major scales, and there are 5 minor scales between every two major scales, so each major scale represents 0.5s and each minor scale represents 0. 1s, which is why the stop loss accuracy is 0.1s..

The reading is small minute+large second reading. Look at the reading of the DVD first, and the unit is minutes. Just look at the instructions above. Every minute is divided into the first half and the second half. Notice which half minute it refers to.

Then read the market reading, its unit is seconds, if it is the first half minute, read 0-30s, if it is the second half minute, read 3 1-60s.