T touch Meteo out by 20 Milibars

here is manual
http://support.tissot.ch/usersmanual/138-en.pdf

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push t button and push mıddle until it shows 24h or 12h then push t putton 5 sec it changes into sync mode.Now you can adjust two needeles at 12 both hand pozition.When finish touch t button again

You may need a new battery, but first check out this site:

www.tissot.ch

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Try to recalibrate the Baro/Altimeter as below:

Certain functions need to be calibrated. The altimeter and the Meteo are tied together. When a customer gets the watch, they should calibrate to either the Meteo or Altimeter. The easiest way to find out the altitude of the nearest airport (you can usually get this on line) and then go to the airport and adjust the watch. This will also calibrate the Meteo.

To calibrate the Altimeter:

1. Activate Crystal
2. Press Altimeter
3. Press and hold top + button until the watch beeps and display flashes.
4. Use + and – buttons to adjust altitude
5. Press center of dial to lock in.

Yes, Sir. But remember when pilots reset their altimeter with the local altitude, the pressure value matches the moment wheather pressure. It will be wrong anyway, if you reset you altitude, but the pressure readings are still wrong. Im my case it is happening. The altutide is correct but the pressure of the watch does not match the local pressure. It is 20 hpa over it. By the way, I am an airline pilot.

Go to the offical Tissot site www.tissot.ch and download the pdf file "user manual" and there you'll have everything u need to know about operating this great watch...

If it's under warranty by all means pursue a fix. You might have to send it to a warranty center instead of working with your local dealer.

"Water proof" and "water resistant" are very different. About 20 years ago all watch companies stopped promising waterproof and started using the term water resistant. It gives them wiggle room in the guarantee, unfortunately. I believe T-Touch is supposed to be water resistant to only a few meters.

1. How do you know the meteo is wrong? Are you comparing against a known good measurement device?

2. The altimeter requires adjustment every few days or whenever there's a weather change. Select the altimeter, hold the upper or lower button until you have the correct altimeter reading for where you are and it will hold for a few days.

For example, I know my home is at 100m elevation (I checked on a topo map) so I reset it to 100m when I leave the house in the morning. It varies (in my case) by over 100m in either direction, depending on the weather.

This seems to ba a common problem. On mine both the Meteo and Altimeter stoped working. Apparently these watches have a fault with the water proofing and should not be worn in water!