A System and method for measuring the viscosity of printing ink during the printing and ink correction process is presented. The at least one processor causes the machine to operate to read card data from a user card, and to cause a determination to be made that the read card data corresponds to an authorized financial account. When input related to the use of stored customer information is received, data subsystems can be accessed by a privacy engine, which then provides decisioning to produce an enforcement action. A constant voltage generating circuit receives the current signal at an output terminal of the power stage circuit and a reserve supply voltage for providing a supply voltage for the dimming controller. The scarred surface structure hinders the sealing effect between the cover curvature and the diaphragm and thereby counteracts the formation of gas cushions.