can I get four inputs voltage reading from four sources at a time from NI USB 6009 DAQ

[perumpadapu]

I had a photoquadrant detector with four quadrants . each quadrant have a positive lead.  If i connect each lead to the DAQ's a0, a1, a2, a3 terminals and common ground to one of the ground of DAQ. Is it able to read four voltages from four quadrants at a time . And how to take the data through labview. In the manuals it's not shown can you provide me an example program.when i configure daq i'am selecting acquire signals--->analog input--> selecting a0,a1,a2,a3---> then configuring each channel with voltage limits all. then ok. Afetr that on the DAQ VI how can I read these four values. Is it by giving add inputs and put number indicator to each data like that or any other way is there. If you help me it's a kind job

[crossrulz]

Use the DAQmx Read.  Choose a polymorphic case of N channels.  It is up to you whether you want multiple samples as a array, multiple samples as waveforms, or single samples.  The multiple samples as an array will give you a 2D array, the rows being the channel.  The other options will give you an array, an index for each channel.

[perumpadapu]

the requirements is that four channels to be read at a time. Is it possible with this daq card..

regards

DevanarayananVP

[RavensFan]

Yes.  Crossrulz was tell you how to do that.

[Dennis_Knutson]

Yes, you can read all channels though it will not be truly simultaneous with most DAQ devices. You haven't provided the device you are actually using.

[Dennis_Knutson]

Sorry, you did say 6009 in the subject. That is not a simultaneous sampling device. There will be a brief delay between samples.

[perumpadapu]

Thank you for your reply, but if I need to see each sample reading individually as numerals. What I have to do. If possible please sent a sample program

[crossrulz]

Sounds like you need to acquire 1 Sample from multiple channels.  You will then get an array output.  You can index the array for each individual channel.

[perumpadapu]

i need the voltage values from each channel individually. That is my requirement. please provide  a method and if possible please send a sample code

[Dennis_Knutson]

You keep saying the exact same thing. You've been told how to generically do this. If you would provide your code, it would be simple to give specific instructions. We have no idea what type of DAQmx Read you are using or if you are using the DAQ Assistant.