invention an actuation device 8 is connected to the control unit 4 the actuation device 8 preferably comprises a keyboard comprising a number of buttons or keys 9 which for example may be three in number the actuation means 8 can be used in the following manner during calibration of the throttle arrangement 2 when the throttle arrangement 2 is to be calibrated a check whether the throttle arrangement 2 is positioned in the n position is first performed in the control unit 4 if this is the case a predetermined key 9 on the actuation means 8 is pressed preferably this can be acknowledged by means of a light not shown or the like on the actuation means 8 or the bracket 1 this indicates that the calibration is about to commence thereafter the throttle arrangement 2 is set in a certain angular position u03b1 3 in accordance with that shown in fig2 which is a simplified drawing of a throttle arrangement 2 in a bracket 1 the current angular position u03b1 3 is intended to correspond to a certain magnitude of the degree of throttle application for example full throttling in the forward direction when the throttle arrangement 2 has been positioned in the desired angular position u03b1 3 a certain key of the actuation means 8 is pressed this key is chosen beforehand so as to correspond to the desired degree of throttle application consequently it constitutes an acknowledgment of the fact that the desired degree of throttle application is to be locked to the desired angular position the control unit 4 receives the signal from the actuation means 8 and detects that the current key corresponds.