The first thing you can do is create an indicator at the VISA Read output, run the VI, go to Operate>Make Current Values Default, save the VI, and repost it. That way, someone can look at what you are actually getting back from the instrument. The scan from string looks a little odd with you using the Remaining String output. The other thing you can do is post all of the subVIs of the driver you got. Just posting the main VI does not include the important stuff - like how the vendor wrote the code to take a measurement. Do a save with options and select Development Distribution to create an llb. The other thing you want to do is remove every single sequence structure and use the error in/error out connections to enforce data flow. I have no idea if you have automatic error handling turned on but even if you do, it's better to use data flow instead of the sequence structure. Use the Delay function instead of the Wait (ms) to get a time delay function that has error in/out connections. I also don't understand why you have Write LabVIEW Measurement File in the top while loop instead of the loop that acquires it but that has nothing to do with your problem.
