Pressure Measurement!

[111284]

Hi All,

I am a new user of LabView, and I am not familiar with it. Here are some questions that I am facing:

1. I am wondering how can I generate a VI which can measure 10 readings from 10 pressure transducers range from 4-20mA (0-250psia) corrsponding to different time.

2. How can I create a text file (Excel file) to collect the pressure vs. time when the experience is running?

Thanks

Brandon

[RavensFan]

What do you mean by different times?

To create a Spreadsheet like text file that can be imported into Excel, use Write to Spreadsheet File.vi.

Have you taken and LabVIEW training courses?  I would recommend it.

At the very least start going through the free online tutorials.  How to Learn LV

[111284]

Hi Ravens Fan,

Thanks for your reply. Actually what my professor and I are trying to do is to record the ten different pressure transducers located at different places along our simulated water distribution system as time goes by. Thus, we are expected to get whole bunch of pressure data sets with respect to time, and we want to import those pressure and time data sets into a text file (excel). 

Thanks for recommending me to take the LabView training course. I took the course a week ago with my professor, but it didn't really tell how can we set up the pressure VI in our situation. If you don't mind sharing your thought with us and showing us how to set it up, that will be owesome.

Thanks

[MattBradley]

What hardwared do you have for taking the measurements?  As for storing the data, you can use a "Write to Spreadsheet file", use \t as the delimiter, and save it with an .xls extension -- Excel will open it just as if it's an Excel file.

[MattBradley]

I meant hardware, not hardwared.  Arrrggghhhh....

[111284]

Hi MattBradley,

Thanks for your reply. My professor and I are gonna use the ten Omega PX419-250AI pressure transducers with their outputs are 4-20mA (corresponding to 0-250psia). We also ordered the National Instrument's, NI, USB 2.0 Chassis Comapct DAQ with 24-bit, +/- 60V Univeral Modules. We are trying to hook everything up to a desktop with installing LabView 8.6.

Matt, if you can give us some detailed procedures about how to set up pressure measurement VI, it will give us a great hand to help us run the experiment smoothly.

Once again, thanks for your kindly reply

Thanks

Brandon

[RavensFan]

So you want 10 measurements at a time, and take them repeatedly with some time interval in between.  Please post what you've done.  It is easier to correct and modify what you've started than it is to start from scratch without knowing exactly how you want things to look.

Matt, if you make a mistake in your message, you have up to 10 minutes to edit and re-post.  You can go to the options menu to the upper right and click edit.

[MattBradley]

Thanks Ravens Fan.  Always wondered about that.

OK, the first thing to do is to install LabVIEW 8.6.  Until you do that, there isn't much else to discuss.  Next, you are going to have to learn some LabVIEW by going through the tutorial.