Keysight U1610/20A User’s Guide 3
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions that must be taken to maintain safe operation of the instrument.
Direct current (DC)
Equipment protected
throughout by double
insulation or reinforced
insulation
Alternating current (AC) Earth (ground) terminal
Both direct and alternating
current
Category II overvoltage
protection
Caution, risk of danger (refer
to this manual for specific
Warning or Caution
information)
Category III overvoltage
protection
Caution, risk of electric shock
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