A method for controlling a power level supplied to a load by an auxiliary output of a power source is presented. The method includes providing a power source having a user-adjustable main output and an auxiliary output. The method further includes providing a controller that is operative to control the level of the auxiliary output, the controller having at least supply and programming modes of operation. The method still further includes selecting the programming mode and adjusting the power level of the auxiliary output to a desired level while in the programming mode, thereby defining a programmed desired level. The method yet still further includes storing the programmed desired level in the controller, and then controlling the auxiliary output to the programmed desired level while operating the power source in the supply mode. The method further includes delivering power to the load in accordance with the stored desired power level.