I just invented a way to pressure test and clean a watch at the same time

[Jerboy]

I just changed the battery on my watch a few min ago, because the display goes when I used the light and I happen to have a spare battery laying around.


You're supposed to change the O-ring when you change the battery, but I took the risk and reused it. I cleaned all the mating surface before reassembly and I wanted to ensure seal was all good.

Normally, a pressure vessel filled with water is pressurized with an air compressor. Each 1kg/cm2 relates to 10m in depth. I didn't feel like setting this up, so I just filled a jar with Coke, dropped the watch in, put the lid on tight and shake it. My watch rated is rated at 50m and it had no problem passing 35m equiv of pressure.(Coke=35-40psi).


When I took out the watch it was nice and clean. Some mark that I thought was etched from salt from skin was completely gone. Coke is quite acidic so it is a pretty good cleaning agent.


edit: grammar

 

[atrowe]

Put it in the dishwasher and report back here with your results.

 

[Jerboy]

<< Put it in the dishwasher and report back here with your results. >>




No point. Pressure in dishwasher isn't very high and watches aren't subjected to kind of temperature experienced inside a dishwasher.

I pressure tested my watch, because I didn't want my watch to leak water unexpectedly such as when I swim or shower at school(no I don't take off my watch to shower in locker room).

 

[peto]

And just think, you drink something more powerful than most cleaning agents everyday! Your insides must be spotless.

 

[notfred]

how exactly did you determine the pressure exerted by the coke on the watch?

throw a ballon filled with air in your coke pressure tester. If it's really the equivelent of 100 feet deep, then the ballon should shrink to probably less than 1/10th it's original size.

edit: oh, and I don't belive that your coke exerted noticeably more pressure on the watch than water would have in the same environment (a sealed pickle jar, or whatever)

 

[UberNeuman]

<< Put it in the dishwasher and report back here with your results. >>

\

I believe he meant put the watch on and climb inside the dishwasher - he can correct me if I'm wrong...

 

[Jerboy]

<< how exactly did you determine the pressure exerted by the coke on the watch?

throw a ballon filled with air in your coke pressure tester. If it's really the equivelent of 100 feet deep, then the ballon should shrink to probably less than 1/10th it's original size.

edit: oh, and I don't belive that your coke exerted noticeably more pressure on the watch than water would have in the same environment (a sealed pickle jar, or whatever) >>



Based on the fact 1kg/cm^2 is about 1bar and its a known fact that every 10m(33ft for those who doesn't understand metric) of water depth means increase in pressure by 1bar relative to atmospheric pressure.

The pressure is based on a rep from Brooklyn Pepsi bottling center.

When you open the can, put it jar and shake it, the tempreature increase and CO2 released quickly raises internal pressure.


http://hypertextbook.com/facts/2000/SeemaMeraj.shtml states "Kimmey, R. Pepsi Brooklyn Bottling Center. Fax. 25 May 2000 "At 60 F, the gauge pressure in the container is approximately 40 psi"

 

[imported_vr6]

This is way too complicated, i'll rather pay 5$ and get my batteries replaced in the store...

 

[atrowe]

<<
http://hypertextbook.com/facts/2000/SeemaMeraj.shtml states "Kimmey, R. Pepsi Brooklyn Bottling Center. Fax. 25 May 2000 "At 60 F, the gauge pressure in the container is approximately 40 psi" >>



Wow! 40 PSI. You could inflate a tire with that. Next time I get a flat, I'm gonna pour some Pepsi through the valve and shake it up.