What is the difference between the “alti” and “baro” use in my Suunto wristop computer?
If you wish to use your wristop computer as a weather station when camping or staying at a constant altitude, choose the “use baro” function in either hiking or chrono mode. When you choose “use baro”, your altitude will stay steady and you will get changes in absolute and sea level air pressure readings. If you are on the move and wish to measure your altitude changes, choose the “use alti” function. The sea level pressure will be kept steady and your altitude will keep changing to correspond to the changes in the absolute air pressure. Unfortunately, it is not possible to measure weather changes and altitude changes at the same time. The wristop computer measures altitude changes by measuring changes in the air pressure and it is not possible for it to tell the difference between a change caused by the weather and one which is caused by a change in altitude.
