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Testing values
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Finished Divers watch placed for water resistance test on ALC2000 WR testing machine.
 
WATER RESISTANCE
...and taking care of your watch!
Water Resist has replaced the now obsolete term of Waterproof, as the latter was very absolute and was not properly identifying the pressure a watch can be exposed to.
The term Water Resist (WR) is followed by a number indicating the pressure a watch case can sustain. This number, according to the manufacturer’s choice, can be either in Meters (m), Feet (ft), Bars or Atmospheres (ATM).
In this point it must be clearly pointed out that units of meters and feet indicate a pressure rating and NOT the recommended depth for diving.
These ratings take into account the combination between motion and depth.
Since a watch is not static when worn on the wrist, pressure applied to a watch dramatically increases with motion.
It is clear that if you dive into a pool to a depth of 2.5 meters the pressure a watch will be sustained to will not be 0.25 atmospheres.
Below is the definition for the water-resistance categories. Use your watch accordingly.
Note that one atmosphere (ATM) or Bar of pressure, is equivalent to the pressure exerted on a static object lying in a depth of 10 metres. This pressure is increased with motion accordingly.
WATER RESISTANT 30m: The watch is safe for accidental contact with splashes of water.
WATER RESISTANT 50m: Suitable for swimming on the surface of the sea.
WATER RESISTANT 100m: Can be used for snorkelling.
WATER RESISTANT 200m and more: Suitable for scuba diving.
 
 
 
 
 
 
 
Water Resistance protection is not a permanent state and a watch needs periodical maintenance by replacing all rubber seals, followed by a water resistance test as a proof that the watch is impervious to water.
In order to preserve the watch’s water resistance:





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