Keysight Technologies U1273A Guide De L'utilisateur page 5

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)
Earth (ground) terminal
Equipment protected throughout by
double insulation or reinforced
insulation
Fuse
Keysight U1273A/U1273AX User's Guide
Caution, risk of electric shock
Caution, risk of danger (refer to this manual
for specific Warning or Caution information)
CAT III
Category III 1000 V overvoltage protection
1000 V
CAT IV
Category IV 600 V overvoltage protection
600 V
Battery, general
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