The E4991B creates automatic log of data for troubleshooting purpose. For security reasons, if this data needs to be deleted, then :SERV:LOGG:CLE command can be used to clear the log recorded by the E4991B.
The log file stores data related to:
Power ON time
Number of times of power ON
Result of power ON test
Number of times of overload
Event Log
Hardware driver installation/error Log
Connected USB device Log
User calibration Log
Firmware error Log
Temperature of analog boards
Internal test result