Keysight U8903B 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.
Direct current (DC) Alternating current (AC)
Off (mains supply) On (mains supply)
Caution, risk of electric shock
Caution, risk of danger (refer to this manual
for specific Warning or Caution information)
Earth (ground) terminal Frame or chassis (ground) terminal
Protective earth (ground) terminal
Equipment protected throughout by double
insulation or reinforced insulation
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