How to Understand Watch Waterproof Level 3ATM
How to Understand Watch Waterproof Level 3ATM
The waterproof of watches relies on the waterproof rubber rings at the mirror, back cover, handle, etc. to meet the corresponding standards. All waterproof watches are stamped with the English words "WATER RESISTANT" or "WATER PROOF" on the bottom cover. Watches without waterproof markings can only be dustproof and should be avoided from getting wet. Thirty meter (3ATM, or three atmospheres) waterproof meter, can be used for daily grooming or in rain, where water droplets only splash on the surface without any water pressure applied to the meter.
At present, consumers can buy waterproof watches from legitimate businesses in three categories: waterproof watches for daily use, reinforced waterproof watches for daily use, and waterproof watches for diving. 1. Waterproof watch for daily use: It can prevent sweat, accidental contact with rainwater, or water droplets during facial washing, but is not suitable for bathing, swimming, diving, and other situations. 2. Enhanced waterproof watch for daily use: It can be used for work, sports (swimming, surfing, etc.) or snorkeling that often require water. 3. Waterproof watch for diving: It can be used for snorkeling or scuba diving. In addition, according to different diving depths, this waterproof watch can be divided into waterproof functions for air diving, waterproof for saturated diving, and waterproof for professional diving.
When choosing a waterproof watch, pay attention to the text explanation about the scope of application, and stay calm when facing the promotion of numerical values and pictures. Purchase according to needs; Wear a waterproof watch within the scope and circumstances indicated in the manual; Do not wear a watch in environments such as bathing, sea bathing, hot springs, exposure to high-temperature steam, or sudden and significant temperature changes; Waterproof watches must be cleaned, tested for waterproofing, and replaced with waterproof components at the manufacturer's designated or legitimate repair point with the required technical capabilities and equipment level within the correct time according to the instructions; Regular cleaning and maintenance of expensive watches is particularly important, and of course, maintenance fees are also quite expensive.
At the same time, some inevitable phenomena may occur during the use of watches: the needle is inserted every day, and the rubber band inside the handle or tube will gradually wear out. Or if worn for a long time, the rubber ring may age. These damages will affect the waterproof performance of the watch in the later stage.
Why is it said that even a watch with good waterproof properties cannot come into contact with hot water and steam—— The thermal expansion of the surface glass due to the influence of temperature will cause a gap between it and the case; The waterproof rubber ring of the back cover is aging or corroded due to sweat, which can reduce the waterproof performance of the waterproof watch. Therefore, general waterproof watches should never be worn for swimming or bathing. When washing clothes, dishes, and cooking, it is also important to be careful not to splash water onto the watch or allow water vapor to enter the watch. Otherwise, it may cause the internal parts of the watch to rust, affect the quality of the pointer, and even lose its use value. At present, any waterproof watch, regardless of the indicated distance, cannot be used in hot water (>40C °). There are two reasons: 1. The permeability of water molecules is greatly enhanced when the temperature increases, and all waterproof watches are designed based on cold water. 2. According to thermal expansion, some components of the watch will expand to varying degrees under hot water conditions, leading to the increase of possible gaps.
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