Patent ID: 8689323
Filing Date: 2014-04-01
Classification: G01D,G01P,G07C

Abstract:
1. A method for enabling at least one function of at least one tachograph that comprises a control unit and an interface connected to the control unit, wherein the control unit is enabled by programming to perform a first group of functions, the method comprising: connecting an external storage medium to the interface of the at least one tachograph, wherein the external storage medium includes at least one instruction that can be read by the control unit to enable a function; performing authentication between the external storage medium and the control unit; enabling the function associated with the at least one instruction; associating the function with the first group; and breaking the connection between the external storage medium and the interface of the at least one tachograph, wherein the at least one instruction comprises another function, wherein the another function enables an available further interface of the tachograph, wherein the function can be enabled on a number of tachographs, the number of tachographs determined by a magnitude of a difference between a number stipulated by the external storage medium stored on the external storage medium and a number of enabling operations already performed by the external storage medium.