This morning I retrieved the MMC card from our Symphonie logger. The logger was beeping and the screen said press any key to format card. I removed the card and brought it back to my office to download the data. The data was intact, but was missing the most recent 6 days.
I assumed the card was full. I then used my pc to delete the data in the "NRG" folder, but I did not delete the folder itself.
I went back out to replace the card. The logger asked instructed me to format the card by pressing "9" to erase and format the card.
After a few seconds, the logger reported that it could not format the card.
I then came back to the office and checked the most recent dataset to determine the battery level. It is listed at 1.2v. Would a low battery be the cause of the missing data and formatting problem that I am experiencing?