Agilent Technologies 4156b, User Manual, Page: 4 / 414

4 Agilent 4155B/4156B User’s Guide Vol.2, Edition 5
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Safety Summary
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific warnings elsewhere in this manual may impair the
protections provided by the equipment. In addition, it violates safety standards
of design, manufacture, and intended use of the instrument. Agilent
Technologies, Inc. assumes no liability for customer’s failure to comply with
these requirements.
NOTE Agilent 4155B/4156B/41501B comply with INSTALLATION CATEGORY II for
mains input and INSTALLATION CATEGORY I for measurement input terminals,
and POLLUTION DEGREE 2 defined in IEC 1010-1.
Agilent 4155B/4156B/41501B are INDOOR USE products.
NOTE LEDs in Agilent 4155B/4156B/41501B are Class 1 in accordance with IEC 825-1.
CLASS 1 LED PRODUCT.
• GROUND THE INSTRUMENT
This is Safety Class I instrument. To minimize shock hazard, the instrument
chassis and cabinet must be connected to an electrical ground. The power
terminal and the power cable must meet International Electrotechnical
Commission (IEC) safety standards.
• DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.
• KEEP AWAY FROM LIVE CIRCUITS
Operation personnel must not remove instrument covers. Component
replacement and internal adjustments must be made by qualified
maintenance personnel. Do not replace components with power cable
connected. Under certain conditions, dangerous voltages may exist even
with the power cable removed. To avoid injuries, always disconnect power
and discharge circuits before touching them.
• DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable
of rendering first aid and resuscitation, is present.