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Safety Symbols
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 throughout by
double insulation or reinforced
insulation
U1271A/U1272A Service Guide
The following symbols on the instrument and in the documentation
indicate precautions which must be taken to maintain safe operation of
the instrument.
CAT III
1000 V
CAT IV
600 V
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
Category III 1000 V overvoltage protection
Category IV 600 V overvoltage protection
III
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