A little confused on this one. If you are measuring pH the VI will depend on what type of tranducer and DAQ card you are using to measure pH Level. Most pH meters simply have a digital display with the pH level and maybe some other information. The great thing about LabVIEW is that you can customize how you want the display to look, and what information is posted on the display. You can change colors, fonts and lots of other features.
It may be easier for someone to post an example for you if they know what hardware you using to measure the pH. This will insure that you will get an example that will work with your setup.
