Can you let me know what firmware version you were using? What you describe sounds much like an issue that was sometimes triggered by the low gas alarm, where some portion of the display would not update. That should be fixed in recent versions, including the 2.14 currently posted. I'm guessing the pressure is recorded correctly in the log.
I will try to put together release notes for the updates and post them here.
Ron
I was on 2.13. My next dive will be 20 May, so I'll just wait till the 2.15 update comes out.
The temperature display comes from the depth sensor. We do have diagnostics available that can compare this output with other internal sensors, and you can check the temperature at any time in the System info screen. If it seems really off you would want to do that, and also verify that the sensor is reading correct atmospheric pressure. The System Info screen is intended to provide a place to check the accuracy of the sensors, among other things. You can usually find local atmospheric pressure in mbar online, the Cobalt should be tracking that within 5 mbar or so.
One of the things that we suspect happens in diving is that when the Cobalt is held in your hand for a bit, the case warms up, and since it is fairly massive and the depth sensor is right below where it would most often be held, it tends to read a few degrees higher. All I can say is that whenever we have checked Cobalts customers said were reading high against a calibrated thermometer in a stable environment, they have been within a degree or two of correct. And the complaints have been about the temperature reading higher, not lower.
If you check the temperature reading on the surface, does it seem correct?
Ron
I converted 29.62 inHg to mbar and, if accurate, the Cobalt is off by 34mbar.
Also, I think the water was 60F and the cobalt was reading 68-70F. Right now it's reading 77F in my living room, which is pretty close.
---------- Post added April 28th, 2014 at 05:34 PM ----------
Nick has created a new version of Macdive and it now works fine on my mac. Also, the latest firmware addresses some of the screen display issues I was having. Although, there is still some text getting cut-off on one of the screens.
Is this a special version for testing? 2.3.1 is still the only one on macdive.com