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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)
Alternating current (AC)
Both direct and alternating current
Three-phase alternating current
Earth (ground) terminal
Protective conductor terminal
Frame or chassis terminal
Equipotentiality
Equipment protected tshroughout by
double insulation or reinforced
insulation
Keysight U1253B User's and Service Guide
Off (supply)
On (supply)
Caution, risk of electric shock
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Caution, hot surface
Out position of a bi-stable push control
In position of a bi-stable push control
CAT III
Category III 1000 V overvoltage
1000 V
protection
Category IV 600 V overvoltage
CAT IV
protection
600 V
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