Portable electronic device designed to display the value of variables based on measurements taken by a sensor and having a history function

摘要

The device has a controller circuit (21) and a resonator (22) provided in time, acquisition and history modes. Memory zones (25, 26) e.g. RAM and stable memory, stores instantaneous values along given periodicity, in the acquisition mode. The circuit and the resonator parallely display chronological series of values in preset time interval based on the stored values in the history mode. One series directly represent values taken by measurement of physical magnitude in the acquisition mode, and another series is calculated from the stored values and represent time variation in the measurement. An independent claim is also included for a method for displaying a history for a portable electronic device.