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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)
Earth (ground) terminal
CAT IV
Category IV 600 V overvoltage
protection
600 V
CAT III
Category III 1000 V overvoltage
protection
1000 V
Keysight U1281A/U1282A User's Guide
Alternating current (AC)
Caution, risk of danger
(refer to this manual for specific
Warning or Caution information)
Equipment protected throughout by
double insulation or reinforced
insulation
3
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