Can I get LabVIEW to indicate whether my circuit is powered or not?

[MariusRusu]

Hi,

I have built a VI to read in the voltages from 10 thermocouples which are all on one circuit. I am using a NI USB-6210 to read in the data. This is powered by my laptop via USB. My circuit however is powered by its own power supply. I would like to get LabVIEW to show a message if the power is switched off. Does anybody have any idea how I might go about this?

Thanks in advance

[Charles_CLA]

What voltage level is your power supply? If it is over 2.5V you could wire it to one of the digital IO pins and read that pin before starting the test.

[crossrulz]

Use a DAQ channel to read the voltage.  You can decide if it is on or not based on some threshold voltage.