Keysight U1610/20A Service 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)
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