Q: What is the meaning of an asterisk on a data record in the sent Data (*T,* I or *A)?
A: In the (sent) data and (downloaded) data file, the asterisk is used as a marker. The value, followed on the marked item, is not actual, the last known value is shown. Download the data file and search for a error message, causing the problem the measurement was not taken.
T: A list of error messages can be found in the Data Logger Manual, Chapter “System Messages”.