8 Keysight 34921A-34925A User’s Guide
Do not connect the Analog Buses directly to a mains power outlet. If it is
necessary to measure a mains voltage or any circuit where a large inductive
load may be switched, you must add signal conditioning elements to reduce
the potential transients before they reach the Analog Buses. Refer to User's
Guide for the maximum rated transients for each external source.
When working with dangerous voltage levels, intentionally closing of
multiple bus and channel relays could cause a potentially lethal hazard on
external connections. Use extreme caution when handling and testing and
adjusting this instrument. Do not perform these procedures unless qualified
to do so. Failure to recognize and observe normal safety precautions could
result in personal injury or death.
No operator serviceable parts inside. Do not install substitute parts or
perform any unauthorized modifications to the instrument. Return the
instrument to Keysight for service and repair to ensure the safety features
are maintained in operational condition. Instruments that appear damaged
or defective should be made inoperative and secured against unintended
operation.
To prevent electrical shock, disconnect the instrument from mains and
external circuits before cleaning. Use a dry cloth or one slightly dampened
with water (or 70% Isopropyl Alcohol) to clean the external case parts. Do
not attempt to clean internally. Allow any moisture to evaporate prior to
energizing the instrument.
This product is designed for use in INSTALLATION CATEGORY II and
POLLUTION DEGREE 1 and 2 (See module specifications for ratings for each
Pollution Degree environment).
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