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The term "atm" means "atmosphere" It's a term used to measure pressure. One atmosphere is the atmospheric air pressure at sea level.
On a watch it is a measure of water resistance. Under water the pressure increases by one atmosphere for every 10 metres of depth. So "10 atm" on a watch means it is water resistant to 100 metres. "30 atm" is water resistant to 300 metres.
http://en.wikipedia.org/wiki/Atmospheric_pressure
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoProtected in everyday life, bathing, accidental splashes, short swimming or car washing - it is resistant against perspiration, water vapor, rain drops.
It is tested for water resistance up to 3 ATM, and must be able to survive 30 minutes under water at a depth of 1 m (3 feet) followed by 90 seconds under a pressure corresponding to 30 meters.
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What does 3 ATM mean on wrist watches?
"3 ATM" on a watch is a pressure rating for 3 atmospheres (a unit of pressure equivalent to three times Earth's atmosphere) which is roughly equivalent to 30 meters (~100 feet) of water resistance (though most manufacturers will not recommend you swim or dive with it at all)
What does 5 ATM mean on a wrist watch?
"ATM" stands for ATMospheres and the number before it, refers to the number of atmospheres of pressure the watch will withstand before leaking. At sea level we are all subjected to one atmosphere of pressure, because we have one atmosphere of air above us pressing down. For every 33 feet (10 metres) underwater you go, the pressure increases by 1 atmosphere. Therefore, at 33 feet underwater the pressure is 2 atmospheres (2 ATM), at 66 feet underwater the pressure is 3 atmospheres (3 ATM), etc. So 5 ATM is equivalent to 132 feet (40 metres) underwater. In conclusion, the ATM rating of a watch is the number of atmospheres of pressure the watch will withstand before breaking/leaking. To convert ATM 's into the depth rating in metres just subtract 1 and multiply by 10. eg: 5 ATM = (5 - 1)*10 = 40 metres.
What does the abbreviation ATM on a waterproof watch stand for?
ATM is the depth by which water resistance is measured on a watch. ATM stands for Atmospheres. 1 atmosphere is equivalent to appx. 33 feet depth in water. So if a watch is 3 ATM = 100 ft. water resistant.
Does a man wear a watch over the wrist bone or under?
Most people wear their watch under the wrist bone. <3 welcum.
How much did the first wrist watch weigh?
3 pounds.
How do you change the date and time on a 3 button digital wrist watch when the buttons are corroded?
If the buttons on a 3 button digital wrist watch are corroded then it is almost impossible to change the date and time without having the watch fixed.
If two gases with pressures of 2 ATM and 3 ATM are mixed at a constant temperature what will the total pressure be?
2 atm + 3 atm
What is mean by 3 ATM?
That u only have 3 bucks left on ur creditcard. lol.
What change in pressure would result in the volume of gas increasing A 2 ATM to 3 ATM B 3 ATM to 4 ATM C 4 ATM to 1 ATM D 1 ATM to 3 ATM?
Decreasing the pressure of a gas will increase its volume -- C
If 2 gases with pressures of 2 ATM and 3 ATM are mixed at constant temperature what will the total pressure be?
2 atm + 3 atm
What will the total pressure be if two gases with pressure of 2 ATM and 3 ATM are mixed at a constant temperature?
2 atm + 3 atm
If two gases with pressure of 2 ATM and 3 ATM are mixed at a constant temperature what will the total pressure be?
2 atm + 3 atm
