When asking for technical help at the very least let us know the version of firmware you are running.Cliff's Calibration (Mapping) Guide is a MUST READ: http://www.vemssupport.com/forum/index.php/topic,97.0.html
btw in the case one has edited the csv datalog entries as defined in the VemsTune-***\config\vemsTune-v3-1.2.**.ini file, it would be nice to have an easiest way to write them back or to import them for the updated VT version..