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U2701A/U2702A USB Modular Oscilloscopes User’s Guide
iii
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)
Off (supply)
Alternating current (AC)
On (supply)
Both direct and alternating
current
Caution, risk of electric shock.
Three-phase alternating current
Caution, risk of danger (refer to
this manual for specific Warning
or Caution information).
Earth (ground) terminal
Caution, hot surface.
Protective conductor terminal
Out position of a bi-stable push
control.
Frame or chassis terminal
In position of a bi-stable push
control.
Equipotentiality
CAT I
Category I Overvoltage
Protection
Equipment protected throughout
by double insulation or reinforced
insulation.
U2700A_Modular_Scope.book Page iii Tuesday, May 6, 2008 9:32 AM