You should know the waterproof table several misunderstandings

The waterproof performance of the watch mainly depends on the waterproof rubber ring at the mirror, back cover, crown, etc., and the use of spiral crown, so as to achieve the corresponding waterproof standards. The waterproof performance of a watch is usually divided into: Non-waterproof (do not mark the back cover of the table), SWEAT RESISTANT, general waterproof (WATER-RESISTANT), 30 meters waterproof (30M, 3ATM, 3BAR), 50 meters waterproof (50M, 5ATM, 5BAR), diving watch 100 meters waterproof, 200 meters waterproof, 300 meters waterproof, etc.

The waterproof performance of the watch, national standards and international standards have clear provisions: all marked waterproof watches, the minimum to withstand 2 atmospheres, that is, 20 meters of water depth does not enter the water. 30 meters waterproof means that the watch can withstand 3 atmospheres, and so on. The premise of this standard is that the test is carried out in laboratory conditions: the temperature is maintained at 20-25 degrees Celsius, and both the watch and the water are at rest. In this case, if the watch can be waterproof, it is qualified. Some people think that my watch waterproof can reach 100 meters or even 300 meters, so wear their own love watch to take a bath to sauna. In fact, this approach is completely wrong, because the watch itself is not an absolutely sealed case, that is, waterproof does not necessarily prevent water vapor, we all know that water vapor is mixed in the air, the reason why it can float in the air because the molecular structure of water vapor is very small. The seal of the watch depends on the gap between the bottom cover and the case, such as when the temperature difference is large, the atmospheric pressure will squeeze the air with a lot of water into the watch, and the water will also age the rubber, so that its performance will decline and thus lose the waterproof function.

1, first of all, everyone knows that quartz watches and electronic watches are composed of components such as resistance capacitors and batteries, water itself is a good conductor, electrons will "flow" in the water, if the amount of water is large, it will burn the quartz substrate in the short term, if the amount of water is small, there may not be a problem in the short term. But over time, water can corrode boards and cause permanent damage. Water in the mechanical watch will oxidize other components such as the spring gear, resulting in reduced accuracy or even unusable. 2, the temperature difference is too large, such as in the steam room, will make the watch parts deformed, prevent the container parts to change the electrical property. As a result, the watch stops or the accuracy decreases. From the above, it can be seen that no matter how high the craft of your watch and how strong the waterproof standard, do not try to take a bath (except for cold showers) or sauna.

Four, waterproof standard: 30 meters: daily life waterproof, waterproof splash. You can wash your hands and face. 50 meters: daily life waterproof strengthening, can be washed with a small amount of cold water, can not be soaked in water. 100 meters: snorkeling standard, can be used in the pool or the surface of the sea. Above 200 meters: diving watch, can be used in the depth of wearing underwater breathing equipment (according to the depth of diving to choose the waterproof standard of wearing the watch)