User`s guide

Remarks
You can read the statistical values at any time.
The instrument clears the stored statistical data when statistics are
enabled, when an INITiate command is sent, when the
CALCulate:FUNCtion command is sent while CALCulate:STATe is ON, when
the power has been off, when the CALCulate:AVERage:CLEar command is
executed, after a Factory Reset (*RST command), after an Instrument
Preset (SYSTem:PRESet command), or after a function change.