الاثنين، 9 يناير 2017

Knowing How A Watch Water Resistance Testing Is Done

By Nancy Allen


Watches that are resistant to water can be dipped into the water but only to a certain extent. Most watches have different categories when it comes to their degrees of immersion depth. Thus, it would be very important for a person to remember that resistance ratings are being varied from different controlled conditions set by the manufacturers in laboratories.

The resistance of watches will decrease because of the gaskets changing conditions and also aging. Another important thing that people must remember is that being resistant is different from being waterproof. An example to this is when a battery of a watch is changed, after putting back the seal or the covering, this may no longer be able to protect the watch. So in this article, you will be provided with the information about watch water resistance testing Cambridge.

In Cambridge, MA, manufacturers would most likely suggest their clients to have their watches tested by them every year and also every after the batteries are changed. Testing can help in ensuring that the sealing was properly done, thus, avoiding waters to get in. Tests are done in laboratories by the manufacturers with specifically stated controlled conditions. The results during a test may be fully different to real life actions.

In the test, a chamber filled with half air and water will be used, wherein the item is going to be placed. The item is taken out from water. And while increasing the pressure of the air, it will be immersed into it very slowly. When it is already immersed completely, the air pressure will be released slowly. When bubbles come out, this would mean that your watch does not have any resistance.

The shapes of gasket seals may also be affected by the temperature of waters such as in hot showers and hot tubs. This is possible to happen when dipping the item to a hot temperature and immediately dipping it into cold temperature. For example, the item is placed in a hot tub and directly transferred to pool right after. Stressing the gaskets through rapid changes in pressure can rupture them.

The resistance in watches is being obtained by three important factors. These factors are case back, crown, and gaskets. The attachment of case backs into watches may imply different levels of resistances. There are two types of case backs and these are the snap on and screw in.

For a snap on type, pressure seals it and for this reason, it is considered as the least resistant. Another level is screw in type. This type allows the case back to be sealed tighter. This screw in type is threaded before it is screwed into case. Using the threading process and the gasket as seals create double seals.

Crowns as well have two types such as the crown stem and screw down crown. When the crown is moving continuously, the gasket becomes stressed constantly. Screw down types are threaded, having screws that match the tube being threaded. These are essential for watches that submerge in water.

O rings also refers to gaskets. The common materials used for these are either Teflon, rubber, or nylon. These are forming watertight seals in joints wherein crown, crystal, and caseback will meet the watch case. Gaskets often break down easily and erode as well, causing the diminishing of resistance.




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