Graph multiple Voltage signals and record

[aubitig]

Hello, I thought I got it right. I am trying to measure 4 voltages. I wanted to record them as well. One of the voltage is Acceleration and others are plain voltages. The problem I am facing is I used arrays to split them up but all of them are reading the same input and not different ones. I am using CB-68LP with PCI 6250. Could anyone look into it and let me know where am I going wrong?Drop 2.0 is the final one.

Thank You

[_enigma_]

aubitig,

If you are going to use the DAQ Assistant Express VI, I would recommend simplifying your approach.  Take a look at the attached example VI.

Also, make sure to double check your connections to the CB-68LP connector block with the pinout for the PCI-6250.

Regards,

Alexander M

Applications Engineer

National Instruments

[aubitig]

Hello Alexander, Thank You for the reply, I have trouble opening the VI as I have Version 10.0.1 it doesnt let me open it. Is there any other way to open it?

Thank You

[_enigma_]

This one should work for you, please see the attached VI.

Regards,

Alexander M

Applications Engineer

National Instruments

[aubitig]

Thank You Alexander, It is much simpler than what I had. I have one concern though, when I have only one voltage as input the other graphs are also responding. I am trying to get the drop in voltage during impact test, so would it not mess up my data of the channel when I have 0 voltage?

Thank You

Namo

[aubitig]

Thank You Alexander, It is much simpler than what I had. I have one concern though, when I have only one voltage as input the other graphs are also responding. I am trying to get the drop in voltage during impact test, so would it not mess up my data of the channel when I have 0 voltage?

Thank You

Namo

[aubitig]

Thank You Alexander, It is much simpler than what I had. I have one concern though, when I have only one voltage as input the other graphs are also responding. I am trying to get the drop in voltage during impact test, so would it not mess up my data of the channel when I have 0 voltage?

Thank You

Namo

[_enigma_]

Namo,

Since you have configured the DAQ Assistant to read 4 voltage channels, the other graphs will always respond whether you have an acutal physical connection or not.  You can either choose to ignore the data from the other channels, or reconfigure your DAQ Assistant to read only 1 voltage channel. In the realm of basic data acquisition, all voltage channels can be considered independent and the voltage reading of one channel will not affect the other. 

To help you establish a better background with LabVIEW and data acquistion, I would recommend reviewing the Developer Zone articles below.  These should help you finalize your application.

Getting Started with LabVIEW

Getting Started with DAQmx

Regards,

Alexander M

Applications Engineer

National Instruments