4 Keysight N8900 Rack System Installation Guide
The following general safety precautions
must be observed during all phases of
operation of this instrument. Failure to
comply with these precautions or with
specific warnings or instructions
elsewhere in this manual violates safety
standards of design, manufacture, and
intended use of the instrument. Keysight
Technologies assumes no liability for the
customer's failure to comply with these
requirements.
General
The equipment is for industrial use.
Equipment operators are subject to all
applicable safety regulations. Along with
the warning and safety notices in this
manual, all relevant safety, accident
prevention, and environmental
regulations must also be followed. In
particular, the operators of the
equipment:
• Must be informed of the relevant safety
requirements.
• Must have read and understood the
operating manual before using the
equipment.
• Must use the designated and
recommended safety equipment.
Do not use this product in any manner not
specified by the manufacturer. The
protective features of this product may be
impaired if it is used in a manner not
specified in the operating instructions.
Grounding
This is a Safety Class 1 product and has a
protective earth (ground) terminal. To
minimize shock hazard, the instrument
must be connected to the AC mains
through a grounded power cable, with the
ground wire firmly connected to an
electrical ground (safety ground) at the
power outlet. Any interruption of the
protective (grounding) conductor or
disconnection of the protective earth
terminal will cause a potential shock
hazard that could result in injury or death.
Leakage Current
Due to types of products that can be
installed in this cabinet, there is a risk of
high leakage current. Reliable ground
circuit continuity is vital for safe operation
of this product. To reduce the risk of
electric shock, earth (ground) connection
is essential before connecting the power
supply. Never operate this cabinet with
the ground conductor disconnected.
Hazardous Voltages
HAZARDOUS VOLTAGES All models
generate voltages in excess of 60 VDC,
with some models rated at up to 1,500
VDC! Ensure that all instrument
connections, load wiring, and load
connections are either insulated or
covered so that no accidental contact
with lethal output voltages can occur.
Cabinet Stability
To reduce the risk of cabinet instability,
always install the power supplies starting
from the bottom of the rack and continue
to the top of the rack. Install a filler panel
in any unused instrument trays.
Before Applying Power
SHOCK HAZARD Always turn off the
external disconnect device before
opening the rear door.
Only operate the product at the rated
mains voltage and phase as stipulated on
the input label.
All connections must be made by
qualified personnel who are aware of the
hazards involved. Improper actions can
cause fatal injury as well as equipment
damage.
Never touch cables or connections
immediately after turning off the unit.
Depending on the model, lethal voltages
can remain at the output terminals for up
to 10 seconds after turn-off. Verify that
there is no dangerous voltage on the
output or sense terminals before touching
them.
Environmental Conditions
Do not operate the equipment in the
presence of flammable gases or fumes.
Environmental conditions are described
under Common Characteristics.
Do Not Open Cabinet Doors
Only qualified, service-trained personnel
who are aware of the hazards involved
should open cabinet doors. Always
disconnect external power before opening
cabinet doors.
Do Not Modify the Instrument
Do not install substitute parts or perform
any unauthorized modification to the
product.
In Case of Damage
Instruments that appear damaged or
defective should be made inoperative and
secured against unintended operation
until they can be repaired by qualified
service personnel.
Safety Symbols
Direct current
Alternating current
Frame or chassis terminal
Standby supply. Unit is not
completely disconnected
from ac mains when switch
Caution, risk of electric
shock
Caution, refer to
accompanying description
Protective earth ground
terminal.
Contains one or more of the
6 hazardous substances
above the maximum
concentration value (MCV),
WARNING
WARNING
WARNING
WARNING
WARNING
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