Gravity measurements from a borehole gravity survey are obtained by continuously moving the gravity meter within the borehole. The apparatus can also comprise a location module for detecting a geographic location of the storage device. In some embodiments, the transmitter unit is adapted to wirelessly communicate by a communication signal with a communication unit, arranged in connection with an external device, in order to transfer measured physiological data to the external device. 6V Transorb device are added to the 5V power supply of the controller, and all unused pins are terminated to reduce unwanted ringing transients in the controller leadframe. One of several single or multi-page forms in the selected, and attached to the clipboard without any special attention to its positioning.