Abstract: In a method for human machine interface navigation, a controller is in communication with an electronic display. The controller is programmed to cause a navigation tool to appear on the display. The navigation tool includes an overview window exhibiting a plurality of selectable main and sub tabs. Upon selection of a sub tab, a parameter screen is displayed. A parameter screen corresponding to a last selected sub tab is exhibited upon selection of an associated main tab.

Abstract: Arrangement for controlling the power supply to a load (19) fed from a rechargeable current source (15) of limited capacity, such as a battery, supplied with energy from a generator (17), a solar cell arrangement or the like and connected to the load (19) via a line (12) of undetermined resistance which connects to the load (19) via a terminal (16) at which voltage measurements can be performed. The arrangement is an electronic control arrangement (18) disposed adjacent to the load (19) and connected to the terminal (16). The electronic arrangement performs voltage measurements at said terminal in accordance with a predetermined program. In a series of such voltage measurements a first one is performed with the load (19) disconnected, whereas one or a plurality of measurements are performed with the load (19) connected. The first voltage measurement value represents the terminal voltage of the current source (15) at the start of the series of measurements.