channel name is C3:PSL-ACAV_VCOMON_CAL, calibrated in MHz using the fifth order polynomial equation at the moment.
Unfortunately the field length for the EPICS CALC record is limited (but not mentioned anywhere in the manual !) so the 9th order equation is too long

will change that later to 2 channels for calculating parts of the equation each and then finally combining those parts in a third record to C3:PSL-ACAV_VCOFREQ