Does the RFID memory store the exact time and date that the product was originally initiated at?

Modified on Mon, 14 Oct at 5:49 PM

Does the RFID memory store the exact time and date that the product was originally initiated at?

The logger contains the following information. Firstly, the logger stores the UTC (Unix Time) timestamp of when the logger was originally activated. This timestamp is derived from the reader or application in use. It is highly accurate and has a margin or error equating to one second. The logger also stores the logging interval, which is the configuration value written by the reader or application. The RTC counter, which is a counter in RAM that increases every 30 seconds is also stored. The RTC counter begins counting when the original UTC timestamp is written. The RTC counter continues counting throughout and after the logging process is complete. The RTC counter only stops counting when it runs out of battery, at which point it will reset. The final metric stored by the logger are the temperature samples. Each temperature is stored as a 12-bit two’ complement number including four fractional bits. There is no timing information associated with any of the temperature samples and each one is located in the USER bank starting at address 160.