Current DC wrong values with USB 6341

[GerdW]

Hi giant,

your USB6341 can also measure smaller input ranges than ±10V as is written in the specs!

What do you measure when you configure a DAQmx task measuring voltage with AI2 and setting input limits to ±0.2V (minimum range)?

What about 10-50 kHz sample rate (with block size/number of samples set to 1/10th of the sample rate)?

[rgwagner888]

It looks like your scaling in your MAX task is off. Open LabVIEW and click on help. Go to Find Examples and click on it. Search for "Voltage - Continous Input" Open that VI and run it. Select your channel and verify the voltage you are getting across the 0.010 resistor.

Kind regards,

Rick Wagner

[giant_steps]

In fact I am getting almost 0 throw the resistance of 10 miliohms. It means that something is not right. I was checking all my connections and they are right.

Do you know if it could be the usb cart or is a problem of my configuration?

Throw my voltage divisor i get the correct 10 volts measured by labview but using my shunt resistor i dont get it.

:x

[giant_steps]

Hi,

I am measuring Voltage in Al1 and current with Al2. my motor connecting to a power supply tell me that its working at 14 volts and 1 ampere more or less. I would like to watch this values special the current throw my labview. I know that i could put less than 10 volts but i did my voltage divisor for 10 volts because i would like to see a closer value from my 14 volts.

I dont know why I am not getting the corect value of current. even if i change the sample rate and frequency i still get a really small current mA.

:x

thanks for your help