Plotting multiple channels of Voltage and Current

[rodwatt]

Hi,

I am very new to Labview and am looking for some help to get me up and running quickly. I have a DAC (USB-6128) connected up to five different power rails. I want to record and plot the current and voltage of each one of these rails on a single graph; probably using a simple stop/start button.

I have seen some example code on line but this seems to be older code and doesn't run on LabView2013.

Please can someone point me to to some example code to get me started. 

I realise this my be quite a simple problem, I am under a bit of time pressure and just need to get something quick.

Thanks in advance,
Rod

[Dennis_Knutson]

Look at Help> Find Examples. There are numerous examples under Hardware Input and Output>DAQmx.

You will need to calculate current by reading voltage over a known resistor since your DAQ device can only read voltage.

[rodwatt]

Thank you for the reply. I had been having some problems accessing these as I was getting an error that the NI server was down, I reinstalled labview, following advice from this forum and that fixed it.

In terms of the shunt resistor value, I am trying to set it to 0.005 ohms but it will not let me put in a number so low. 0.09 is the lowest I can enter.

I would appreciate suggestions on how I can enter a low value of shunt resistor. Thanks!

[Dennis_Knutson]

I don't know where you are trying to enter the value. You can most certainly use any constant value you want with a block diagram constant and one of the arithmetic functions (i.e. the divide function).