Huawei DBS3900 Installation Manual page 292

Conventions
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: Caution Symbol, prompts users to be cautious. "Caution" items
provide helpful suggestions or reference materials not covered in the document.
: Warning Symbol, prompts users to be careful. In this situation, users
might perform an action that may result in an equipment damage or loss of data.
: Danger Symbol, indicates critical safety instructions. This warning
symbol means a danger. Users are in a situation that could cause bodily injury. Before
performing any operation on the equipment, involving electric circuits and understand
the standard practices for preventing accidents.
: High Voltage Symbol, indicates a part exposed to a high voltage. This symbol
warns operators that direct contact with the power grid voltage, or indirect contact with
the power grid voltage through damp stuff or moisture is fatal. The symbol is attached
next to a hazardous voltage point or a protective power supply cover that may be
removed during maintenance.
: Overheating Symbol, indicates overheating. This symbol is attached to
equipment surface that may cause scalds due to a high temperature. The symbol warns
users not to touch the equipment during operation or maintenance. Heat insulation gloves
should be used to prevent scalds.
: Microwave Symbol, indicates that a device emits microwaves. This symbol
warns operators not to unfasten the transmitter output feeder or antenna feeder connector
when the transmitter is working. If you need to unfasten the feeder connector or work
next to the transmit antenna, turn off the transmitter. The symbol is attached next to the
output socket of the transmitter power amplifier or antenna socket of the transmitter
combiner to indicate RF radiation.
or : Protective Earthing Symbol, indicates protection earthing. This
symbol is attached next to a protection ground terminal, and used next to a terminal
connecting equipment and an external ground system. An equipment ground cable is
connected to an external ground bar through the protection ground terminal.
: Protective bonding Symbol, indicates equipotential bonding. This symbol is used
next to equipotential terminals inside equipment.
: Electrostatic symbol: This symbol is used in all electrostatic sensitive areas.
Before operating equipment attached with this symbol, wear ESD gloves or an ESD
wrist strap.
: Altitude description symbol: This symbol indicates that equipment is safe to use
only below the altitude of 2000 m.
Safety Information