A method of operating a medical device having a memory and a processor, wherein the memory is structured to store a number of operating routines, each of at least some of the number of operating routines being associated with a number of operating features of the medical device, and wherein the processor is adapted to execute a first one of the number of operating routines enabling a first set of operating features. The method comprises receiving an enablement code associated with a second operating routine, executing the second operating routing for a predetermined period responsive to receipt of the enablement code, wherein execution of the second operating routine enables a second set of operating features, and terminating execution of the second operating routine responsive to expiration of the predetermined period.