measure the voltage and current draw

[johndoe419]

Hello,

I have compact daq (NI CDAQ 9274) and CDAQ modules to measure current and voltage like NI 9215 and NI 9227 respectively.

1) I need wiring cables to connect current sources to my NI modules. I did not receive any cables when I bought the modules a week ago. So, which ones should I buy/borrow?

2) I have an NVIDIA Tegra TX1 development board and I would like to measure the voltage and current draw for that platform. It comes with a power brick which is rated at 19V (90W max) but the platform can take anywhere from 5.5-19.6VDC. I would like to measure the voltage and current draw. How should one go about it?

Thanks a lot for your time.

[stockson]

Hi johndoe419,

Ad. 1:

Choice of wires depends mostly on what kind of kind of signal you want to measure (frequency, current, voltage etc.) and the measurement environment (laboratory, noise, distance to measurement point etc.). If you don't have any special requirements (i.e. you don't take 1kA measurements on production floor) you will be fine with any copper wire. You can read more about different parameters dependant on wire size here: https://en.wikipedia.org/wiki/American_wire_gauge#Tables_of_AWG_wire_sizes

Ad. 2:

What exactly would you like to know? There are some tutorials on our website that can help you with the setup and measurement: http://www.ni.com/getting-started/set-up-hardware/ , http://www.ni.com/tutorial/7113/en/ , http://www.ni.com/tutorial/7114/en/