Just like to add to the detail i gave already.Im using MeasStdio 6,and have no problem reading in the signal continuosly and plotting.However i need to plot the voltage against time and observe the voltage dropping off as the time increses,this will have when i switch on a pump but at the moment all that happens is the straigh line which is being shown on the graph is stay constant while the time runs on and is just a falling line,as oppose to plots of voltage against time when the pump is on.Can someone help me to plot the voltage dropping against time once the pump is switched o, as currently the voltage only drops as a single line as oppose to a exp fall off curve