How do I create an excel file that has the volume output and the time at which it occured?

Question

Hello:
I am using Labview to control a New Era Pump Systems automatic syringe pump and to record diameter measurements from a LaserMike optical comparator. My program is fully functional, the code is attached with all auxilliary files in the NE-50X folder. I mostly understand my program, I used drivers for the NE-50X pump found on the NI website to build my code and added to it as needed.
If anyone has ideas about how to do any of these three things, your help is greatly appreciated. I have the output from the syringe pump going into a line graph while I run the test with the time on the x-axis and volume on the y-axis. How would I be able to create an excel file from this information? I would like the excel file to have the time in one column and the volume at that time in the next column. I though that I had wired it correctly, however I feel that the time seems to be a little off and very exact. Attached is the block diagram of what I have done.
Hello:
If anyone has ideas about how to do any of these three things, your help is greatly appreciated.
Attachments:
RATETEST.vi ‏202 KB

Answer 1

Let me start by answering the specific question, and then I will provide some suggestions on the code.
The function you want is the "Write to Spreadsheet File", which you're already using, albeit in a confusing means (more later). I was not able to find any place in your code where you're actually acquiring time information, so I don't understand your comment about the time not being exact. (I'm assuming you mean "not", even though that word was not in your actual sentence.)
As for the code:
As I mentioned, you're using the "Write to Spreadsheet File" twice, as well as the "Write to Measurement File" Express VI. All three seem to be logging the same information, though one of the "Write to Spreadsheet File" functions is logging some sort of volume and diameter information. Please pick one.
You're looping around the path for one of the "Write to Spreadsheet File" functions, but not for the other two functions. Why are you looping the path in the first place?
You' re continuously accruing data into an array to put onto an XY Graph. Please keep in mind that this means the program will slow down as it progresses as this array gets larger and larger, and LabVIEW needs to shuffle memory around. Depending on how fragmented your memory is, you may find the program will crash since LabVIEW cannot allocate a large enough contiguous block of memory for the array.
Your wiring really needs to be cleaned up. Tip: Right-click on a wire and select "Clean Up Wire".
In the middle of the diagram you have a case structure in which the True part has a single iteration loop that's adding 1 to the iteration and updating some local variable, and in the False part you're doing something else with it. I have no idea what you're trying to do, but surely there must be a better way to do it.
You seem to have two tank indicators on top of each other on the front panel and then flipping the visibility of them based on some value. I would think that it would be easier to simply display both at the same time, no? As a user, I would find it somewhat perturbing to see the tanks appear and disappear.