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Safety Symbols Used In Manuals
The following is a list of general definitions of safety symbols used on equipment
or in manuals:
Instruction manual symbol: the product is marked with this symbol when it is
necessary for the user to refer to the instruction manual in order to protect against
damage to the instrument.
Hot Surface. This symbol means the part or surface is hot and should not be
touched.
Indicates dangerous voltage (terminals fed from the interior by voltage exceeding
1000 volts must be marked with this symbol).
Protective conductor terminal. For protection against electrical shock in case of a
fault. Used with field wiring terminals to indicate the terminal which must be
connected to ground before operating the equipment.
Low-noise or noiseless, clean ground (earth) terminal. Used for a signal common,
as well as providing protection against electrical shock in case of a fault. A
terminal marked with this symbol must be connected to ground in the manner
described in the installation (operating) manual before operating the equipment.
Frame or chassis terminal. A connection to the frame (chassis) of the equipment
which normally includes all exposed metal structures.
Alternating current (power line).
Direct current (power line).
Alternating or direct current (power line).
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