Patent ID: 7534099

Claim:
A pumping apparatus for use with a pump set to deliver fluid through the pump set, the pumping apparatus comprising: a pumping device capable of acting on the pump set to produce a fluid flow within the pump set, the pumping device producing said fluid flow in a series of aliquots; a housing capable of receiving at least a portion of the pump set to be acted upon by the pumping device; a controller programmed to control an electrical signal to the pumping device, the controller including a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device whereby the fluid flow rate delivered by the pumping apparatus is more accurate over the useful life of the pump set, wherein the controller includes a memory and a microprocessor in communication with the memory; wherein the pump set degradation compensator is a software program stored in the memory of the controller that is executable by the microprocessor and is configured to correct the aliquot volume as a function of feed rate selected and time of use of the pump set; wherein the software program comprises the following equation: Hi(x)=Gi(x)+T*Fi(x), where Gi(x) is the established aliquot volume as a function of flow rate selected, T is time of pump set use, Fi(x) is pump set flow compensation of volume as a function of flow rate selected, x is a user selected flow rate, and Hi(x) is the corrected aliquot volume as a function of flow rate selected and time of use of the pump set.