U3402A User’s and Service Guide iii
Safety Symbols
The following symbol on the instrument and in the documentation
indicates precautions that 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 Equipment protected throughout by
double insulation or reinforced
insulation
IEC Measurement Category II. Inputs may
be connected to mains (up to 300 VAC)
under Category II overvoltage conditions.
U3402-90001.book Page iii Friday, July 24, 2009 4:04 PM
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