E4418B Power Meter User’s Guide v
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 documentation.
Alternating current (AC).
This symbol indicates the operating switch for ‘Stand-by’ mode. Note, the
instrument 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.
This symbol indicates the operating switch for ‘On’ mode).
External Protective Earth Terminal.
While this is a Class I product, provided with a protective earthing
conductor in a power cord, an external protective earthing terminal has
also been provided. This terminal is for use where the earthing cannot be
assured. At least an 18AWG earthing conductor should be used in such
an instance, to ground the instrument to an assured earth terminal.
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