We are using a PicoScope 3206. Since it has an incorporated data logger, we decided to use this to monitor the power consumed of a certain system that we have built up. Unfortunately, as we all know, oscilloscope can not directly measure currents like multimeters do. So we have a problem.
We planned on putting a resistor in series to the system, measure the voltage across the resistor, then do some Ohm's law. But, we are having problems measuring the voltage across the resistor using the PicoScope. Whenever the "ground" of the probe is connected at the other end of the resistor, the voltage supplied to the system suddenly drops. We think it is caused by the 'universal' ground of the scope and the PC.
Any suggestions on how can we measure the current aside from purchasing the current clamps? Thanks a lot.