reading voltage converting from current in daq

[sgirgin]

Hi all,

i have a pressure sensor that gives ma as output.my daq is reading voltage.i connect resistance as parallel to analog input.But i still cannot read voltage.when i check with ammeter the current value is correct but it cannot convert this current the voltage.

[crossrulz]

What DAQ are you using?  Are you applying a scale?

[sgirgin]

I am using NI 6229 BNC DAQ. I think i have a problem with connection.Sensor has 2 out.One is for power supply other is for signal.I connect sensor + out to power supply + and signal to ai0 from DAQ.I have to connect power supply - to analog input - but i dont know/cannot find where the ai- in this DAQ

[lh845 · Accepted solution]

BNC connections use the outer contact to carry the AI(-).  So, AI(-) should be the round metal cylinder on the DAQ device.

[sgirgin]

It works thank you so much i have been working to solve it several weeks 🙂