Keysight 34950A User’s Guide 3
Safety Symbols
The following symbols on the instrument and in the documentation indicate 
precautions which must be taken to maintain safe operation of the instrument.
Alternating current (AC) Frame or chassis (ground) terminal
Standby supply. Unit is not completely 
disconnected from ac mains when 
switch is off 
Caution, risk of electric shock
Caution, risk of danger (refer to this 
manual for specific Warning or Caution 
information)