Operation Manual

28
EN
The seals are the important factor in guaranteeing the waterproofness of a
watch. These age naturally and are also affected by perspiration and acids.
The level of waterproofness is given in ATM (atmosphere) and noted on the
case back of the watch.
Watches are considered water resistant if they are resistant against sweat,
water droplets, rain etc. They have to remain watertight for a period of 30
minutes when submerged in 1 m of water. These watches are for normal
everyday use and are not suitable for use in conditions where the water
pressure and temperature vary considerably.
An additional specification of pressure, such as “3 ATM”, means the test
conditions have been tightened. The specification “3 ATM” is not to be
confused with the diving depth; it is simply the definition of the inspection
pressure. An inspection pressure of 3 ATM is reached at a depth of 30
meters.
In some cases a short-term higher pressure than the guaranteed inspection
pressure may be enforced on the seals, for example when swimming or diving
into water.
Watches are at particular risk when the wearer dives into water after
sunbathing. The combination of the impact pressure with the negative
pressure caused by the sudden drop in temperature can quite easily cause
damage.
It is important to check and, if necessary, replace seals when the
battery is replaced.