System:preset; System:restart - Keysight E4981A Programming Manual

Command Reference
E4981A SCPI Commands

:SYSTem:PRESet

Syntax :SYSTem:PRESet
Description Resets the instrument to the preset state.
The preset state is different from that when resetting is done by using the
command. For details, refer to Operation Manual, Appendix C "Initial Setting"
(No query)
Related commands
*RST
Equivalent key [Preset] - CLEAR SETTING - OK
sequence

:SYSTem:RESTart

Syntax :SYSTem:RESTart
Description Reboots the instrument immediately. (No Query)
Equivalent key No equivalent key is available on the front panel.
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Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
*RST