Sunday, 22 January 2017

Watch Water Resistance Testing And How It 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.

Resistances of watches decrease over time because of some constant changes in conditions and in aging. Another thing that needs to be remembered importantly is the difference between being resistant and being waterproof. One best example for this is changing the battery of your watch. When the seal or covering is put back, it cannot protect your watch anymore like before. And because of this, a watch water resistance testing Cambridge would be very important.

Manufacturers in Cambridge, MA are suggesting the owners to have their watches tested every once in a year and after changing the battery to ensure that the covering is properly sealed to avoid waters from entering the case. The tests are going to be done in the manufacturers laboratories under some controlled conditions. But do not expect that these tests will have the same results as in real life actions.

During the test, the item will be placed inside a chamber that filled with half water and air. The pressure of air is increased after getting the item out from the water. It is then immersed slowly to it. After completely immersing it, the pressure of air is then released slowly. If there are bubbles, meaning, the watch is not resistant.

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 watches resistance is obtained by 3 factors that need to be considered importantly. These factors include the crown, gaskets, and case back. The case backs attachment to watches are implying two different levels on resistances. These include the snap on and the screw in.

Snap on types are being sealed by pressure and are considered as least resistant. The second one are the screw in types that are allowing tighter seals to a case back. These types are threaded and are screwed to case. Making use of both gasket and threading as seals can create double seals.

The crowns also have 2 types which include the screw down crown and the crown stem. If the crown will move continuously, this is stressing the gasket constantly. The screw down is also threaded along with matching screws for threaded tubes. This type can be essential for submerged watches in water.

Another term for gaskets is O rings. These are made of nylon, Teflon, or rubber. These will form as watertight seals in the joints wherein the caseback, crown, and crystal meet the case of watch. Gaskets would break down and erode eventually that will diminish the resistance.




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