Waterproof watches can be divided into ordinary waterproof watches and professional waterproof watches. Ordinary waterproof watches can only prevent splashing, while professional waterproof watches can withstand soaking in different depths of water.
Waterproofing of watches depends on the waterproofing apron of the mirror, back cover and handle to reach the corresponding standards. All waterproofing meters are marked "WATER RESISTANT" or "WATER PROOF" on the bottom cover. Watches without waterproof markings are only dust-proof and should be free of water. 30m (3ATM, 3 atmospheric pressure) waterproof meter can be used in daily combing or rain, that is, water droplets only splashed on the surface without any water pressure added to the meter. The 50m waterproof meter can be used for swimming and general housework, and the 100m waterproof meter can be used for underwater work such as swimming and diving.
The standard of diving meter is tested by ISO 6425 international standard.
(1) Waterproof aprons are prone to aging and deterioration. They should be replaced regularly or during each repair.
(2) Watch glass damage can affect the waterproofing performance of the watch, and should be replaced in time when damage occurs.
(3) Do not operate the handle of a watch in water or when it is wet to prevent water from entering the meter.
(4) The handle head should be pushed to the bottom after being used. The screw fastening handle head should be locked on the watch, and no space should be left.
(5) Watches should be dried whenever they are wet.
(6) Prevent chemical substances from contacting watches, otherwise it will affect the case and waterproof apron, and reduce waterproof performance.
(7) Watches should not be kept in high temperature (160 degrees C) or low temperature (10 degrees C) for a long time.
(8) If there is water mist in the watch, it should be removed in time to avoid rusting of the parts.
Three Waterproof Watches
1. Spiral Waterproof Watches. The upper shell and the rear cover of the watch case have threads, and the upper shell and the rear cover are tightly screwed together by the action of threads. Table glass is rolled in by tools, which is more compact. Waterproof gaskets (mostly made of butadiene cyanide rubber) are placed in the top handle head, the back cover and the upper shell where they rotate, so they can play a certain waterproof role. This kind of waterproof watch has concave and polygonal bulge outside the back cover of the case. The back cover of the switch shall be equipped with corresponding tools.
2. Buckling Waterproof Watches. Its back cover has a circle of convex sub-openings inside, so that the upper case and the back cover can be closely buckled up. Watch glass and spiral waterproof watches are also rolled in by tools, which are more compact. Waterproof washers are also placed in the upper handle head and in the parts where the upper shell contacts the rear cover. The back cover of the waterproof watch is opened with a knife and closed with a rolling tool or pushed by a finger.
3. Waterproof watch with pressure sleeve. The upper shell sleeve of the watch case is pressed on the bottom cover. The back cover of the watch case has a special shape: there is a high wall around it, the machine core is installed in the wall of the back cover, and the glass of the watch is directly installed on the wall of the back cover. After the upper shell sleeve is pressed in, the glass of the watch case and the back cover are tightly covered, thus playing the role of sealing and waterproof. The upper shank shaft is connected with the upper and lower shafts. When the back cover of the switch is switched, the upper shank head and the upper shank shaft are removed first, and the special rolling tool is used to open and tighten the shank shaft. Without special rolling tools, fingers can also be pushed.