Patent ID: 7468602
Filing Date: 2008-12-23
Classification: G01R

Abstract:
1. A data acquisition unit comprising a digital multi-meter (DMM) including a personal digital assistant (PDA) peripheral device card conformant interface, the DMM being operable to output measurement data to the PDA conformant interface in response to input signals applied to input terminals and the operation of the DMM being configurable by configuration data received from the PDA conformant interface and a computing device including a personal digital assistant (PDA) peripheral device card conformant interface, the computing device having a program memory storing a software application for configuring the computing device to supply digital multi-meter (DMM) configuration data to the PDA conformant interface and to receive DMM measurement data through the PDA conformant interface, the DMM and the computing device being connectable through their respective PDA conformant interfaces, measurement circuitry of the DMM being configured to operate from a uni-polar power supply and includes a voltage divider connected between lower and upper voltages of the uni-polar power supply to provide a reference voltage, and the reference voltage being connected to a one of the input terminals.