Command Calibrate :

sets unitCalibration = pos - steps/conversion

Calibrate Definition
Input Argument	Tango::DEV_DOUBLE	the new value of the current position
Output Argument	Tango::DEV_LONG	completion status
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..