Quote Originally Posted by Acetronics View Post
Hi, Martin

I had a look to your excel sheet and , of course, got THE problem ...

solution was to unlock the sheet , select the "F16" place and click on " place a formula " ( Fx button ) ...

it automatically corrects the written formula and then it rolls fine !!!

Are the Calibration values in the sheet those of YOUR Sensor ???

Alain
Hi Alain, I suspect my friend didn't tell me that so I couldn't fiddle with his sheet

Yes, that indeed is the calibration data out of my BMP085 sensor.

Good news.
Tonight I finished debugging the pressure calculations and got a correct result in Pascals. Boy it took some doing didn't it. :-)
Tomorrow I'll tidy up the code and post the whole job after doing a little field testing.

Now I need to find a sample of a 'good' way to do a look-up table to convert pressure to altitude without using Logs (as I understand is required)...

Martin