Keysight Technologies 3458A Guide D'utilisation page 6

– DO NOT service or ad just alone: Do not attempt internal service or
WARNING
– DO NOT substitute parts or mod ify equipment: Because of the danger of
– Measuring high voltages is al ways hazardous: ALL multimeter input
– Permanent wiring of hazardous voltage or sources capable of delivering
– DO NOT leave measurement terminals energized when not in use.
– DO NOT use the front/rear switch to multiplex hazardous signals between
– To prevent electrical shock, disconnect the instrument from AC mains
This is a sensitive measurement apparatus by design and may have some
CAUTION
performance loss when exposed to ambient continuous electromagnetic
phenomenon.
6
adjustment unless another person, capable of rendering first aid and
resuscitation, is present.
introducing additional hazards, do not install substitute parts or perform
any unauthorized modification to the product. Return the product to
Keysight for service and repair to ensure that safety features are
maintained.
terminals (both front and rear) must be considered hazardous whenever
inputs greater than 42V (dc or peak) are connected to ANY input terminal.
grater than 150 VA should be labeled, fused, or in some other way
protected against accidental bridging or equipment failure.
the front and rear terminals of the multimeter.
power and disconnect all test leads before cleaning. Clean outside of the
instrument using a soft, lint-free, cloth slightly dampened with water.
D0 NOT use detergent or solvents. DO NOT attempt to clean internally.
If needed, contact a Keysight Technologies Sales and Service office to
arrange for a proper cleaning to ensure that safety features and
performance are maintained.
Keysight 3458A User's Guide