1. The problem statement, all variables and given/known data Hi, i have to calculate a calibration factor to change a measurement for velocity in volts from a vibration test rig into a measurement of velocity in m/s. 2. Relevant equations I have data for velocity in volts and i am using the equation v=x'=awcos(wt) to calculate the velocity in m/s... however I can't find a CF for these two values... 3. The attempt at a solution I tried some simple ideas... like the difference between them, however this is not constant over time. I tried the ratio between them but again this is not constant as the time changes. I tried both of these multiplied and divided by time... Has anyone got any ideas or is there a general concept for calculating a calibration factor i have overlooked?