Jan Handrejch

Hello,

I am currently testing logging without a USB flash disk, using only the internal buffer memory. The measurement is set up with the same parameters, and the logging process is running smoothly, with approximately 95k records logged over the course of approximately 5 days. Therefore, the DAQ appears to be functioning correctly under these conditions. I will continue to monitor its performance and will inform you of any potential issues.

Best regards,

Jan Handrejch

Hello Kei/Tek team,

We have been using the DAQ6510 (fw. 1.7.12b) measurement instruments for our long-term measurements in combination with the 77xx MUX cards, depending on the type of measurement. However, we have encountered a persistent issue during data logging to a USB flash disk. After approximately 72 hours, sometimes sooner, sometimes later, the instrument becomes unresponsive. We are unable to control it, and even when switching between Front/Rear, the instrument does not respond. The buttons seem to work, but we cannot make any changes or stop the measurements, and the data logging process is stalled, presumably waiting for the write operation to the Flash disk. The only solution in this situation is to power off the instrument using the physical button. This error prevents us from using the DAQ6510 instruments standalone without an additional computer, and we are compelled to revert to using DAQ KEI270x.

I have attached several photos from the latest occurrence of the issue during a 10-channel 4W resistance measurement. The scan settings were as follows: 4Wres, NPLC = 4, 2 seconds between measurements, channels 101 to 110, Buffer = 100k, and data logging to the Flash disk after each scan. We used the 7708 MUX card for this "ordinary" resistance measurement. After approximately 47,594 measurement cycles, the instrument froze and stopped measuring further. Neither the "Abort scan" nor the "Pause scan" functions were effective in resolving this issue.

Additionally, I would like to mention that the USB flash drive used is a fresh new Verbatim 32GB, empty, and formatted as FAT32. It is important to note that this issue is not isolated to a single instance; it occurs frequently on all four of the DAQ instruments we have.

We kindly request your assistance in resolving this matter as it is significantly impacting our data acquisition process.

Thank you for your attention and support.

Best regards,
Jan Handrejch