I just wanted to share a piece of advice I discovered while pressure testing a Suunto computer (D4f, but it's likely that most of them work the same way) - when you pressurize it in air, turn it on and switch to some kind of dive mode (free/gauge). If left in "TIME" mode, it will perform some kind of ambient pressure compensation and the depth readings when you switch it to dive mode again will be off by the amount of pressure it measured while in "TIME" mode. In "DIVE" mode, it will happily dive even when water contacts are not activated.
If you accidentally pressurize it in "TIME" mode, like I did, it will re-calibrate itself after some time at ambient pressure (provided it's left on in "TIME" mode).
If you accidentally pressurize it in "TIME" mode, like I did, it will re-calibrate itself after some time at ambient pressure (provided it's left on in "TIME" mode).