Measuring a DC voltage

Explains how to measure a DC voltage (wthin the -5 volts to +5 volts range) using expEYES. The cell is connected between Ground and the voltage measurement channel A0. The setup, voltage display (against the terminal A0) and a voltage vs time graph are shown below. Voltage is always measured with respect to the Ground. The terminals marked as GND are at the ground potential, ie. the potential of the USB ground pin of your PC. If by any reason, the body of your PC is having a no-zero voltage, the same will appear on the GND terminals.