LabVIEW
Connect NI9221 to measure the current
Hi,
I have a doubt, I will like to measure the voltage and the current using NI9221.
When I use a multimeter, to measure the voltage I have to connect it in parallel and to measure the current I have to connect it in series. I try to do the same with the NI9221 but the results of voltage was not ok.
In other words, in the following image, which option I have to use to measure the voltage and the current from the resistance?
(I have tried to get the voltage with the AI1 and the current with AI0)
It's a little bit unclear what you are trying to do. Are you trying to measure the amount of power that is being drawn by a motor? In your diagram, what are the leads coming from your motor? And what kind of motor is it?
In general, if you want to measure the current through something with a voltage module, you will need to measure the voltage drop across a known resistance, and then calculate the current using Ohm's law. Or, if power is your end goal, P=V^2/R.
But, if you let me know what the wires coming from the motor represent, and what you are ultimately trying to do, I can help you figure out exactly how you should wire your inputs to the NI 9221.
