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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
U2741A USB Modular 5.5 Digits Digital Multimeter 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 II
300 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 II 300 V overvoltage protection
III
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