Review Safety Information
This power supply is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with an earth ground.
Refer to the Safety Summary page for general safety information. Before installation or operation,
check the power supply and review this guide for safety warnings and instructions. Safety warnings for
specific procedures are located at appropriate places throughout this guide.
Some models generate voltages in excess of 60 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.
Observe Environmental Conditions
Do not operate the instrument in the presence of flammable gases or fumes.
The environmental conditions of the power supply are documented under Specifications. Basically,
the unit should only be operated indoors in a controlled environment. Do not operate the unit in areas
where the ambient temperature exceeds +55 degrees Celsius. This applies for rack-mounting as well
as for bench use.
Provide Adequate Air Flow
Do not block the air intake at the sides of the instrument or the exhaust at the rear of
the instrument.
The dimensions of your power supply as well as an outline diagram are given under Specifications.
Fans cool the power supply by drawing air through the sides and exhausting it out the back. The unit
must be installed in a location that allows sufficient space of at least 2 inches (51 mm) at the sides and
back of the unit for adequate air circulation.
Keysight N6900/N7900 Series Operating and Service Guide 67
2 Installing the Instrument
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