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TDC1000-TDC7200EVM: EVM GUI locks up in my Windows 7 system

Mark Pearson
Genius 12705 points

Part Number: TDC1000-TDC7200EVM

I have a colleague using the TDC1000-TDC7200EVM with a pair of AudioWell transducers.

They are trying to measure fluid flow - when they rotate the tube to a horizontal position the GUI seems to lock up. Any reason why that is?

They have updated the S/W to version 2.01, so they should be up to the latest version.

Another question - when they export their data from the GUI to an Excel file ('Save Graph Data to...') - what units are the data in?

1st column: Start to Stop 1ToF, 2nd column: Start to Stop2 ToF, etc. to Stop5 ToF. Same question for the rest of the columns: What units are they in?

Also - is there a way to know where the data came from / how it was calculated (for those columns that are 'calculated' and not just raw data.

Thanks

  • 0
    TI__Mastermind 31655 points
    Hi Mark,

    How does the GUI lock up? Is it just that the graph data stops running, or does the entire GUI fail and need a reset? If it is the former, it is likely because the transducer is no longer seeing a receive signal due to attenuation from air in the tube (assuming they are just measuring zero flow with a sealed tube filled with water). For measuring zero flow, the tube should be oriented vertically so no air is in the path of the transducers.

    The time units are nanoseconds, and the temperature is in degrees Celsius.

    The calculations for the velocity of the medium and the volumetric flow rate are described in this application note: www.ti.com/.../snia020.pdf

    Regards,
  • 0 in reply to Scott Cummins
    TI__Genius 12705 points

    I have a response back from the engineer:

    "Thank you for getting back to me. In response to your questions on the issue I was having earlier with the GUI lock-up, I was able to re-orient the pipe so it was mounted vertically with water flowing vertically into the pipe. This has seemed to fix the issue."

    I had recommended that the pipe be in a vertical position - so as to have an air-free sample.

    "Similarly to the response you received from the “factory folks” in your first email, the transducer was not receiving the signal from the other transducer, so the GUI was not receiving any data.

    As for the questions in regards to the data-export in excel, I was able to utilize some of the equations that the documentation offered and the time-of-flight values recorded in the excel file to do my own calculations. The calculations for the velocity and flow rate in the exported excel file must make some assumptions in regards to the length and diameter of the pipe being used because I never plugged in any information to the GUI regarding the pipe dimensions and my calculations were different than the values given."

    Perhaps you can comment on the export data from the EVM - what are the exported columns (I assume the data is in columns), and under what assumptions is the data being created under? (like pipe size)

    Thanks