User`s guide

N1911/1912A P-Series Power Meters User’s Guide vii
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.
Caution, risk of danger.
The Instruction Documentation Symbol. The product is marked with this symbol
when it is necessary for the user to refer to the instructions in the supplied docu-
mentation.
Alternating current (AC).
This symbol indicates the operating switch for ‘Stand-by’ mode. Note, the instru-
ment is NOT isolated from the mains when the switch is pressed.
To isolate the instrument, the mains coupler (mains input cord) should be
removed from the power supply.
Direct current (DC).
Both direct and alternating current.
Three-phase alternating current.
Earth (ground) TERMINAL.