8 Keysight 3458A Assembly-Level Repair Manual
– 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.
– DO NOT substitute parts or modify equipment: Because of the danger of
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.
– Measuring high voltages is always hazardous: ALL multimeter input
terminals (both front and rear) must be considered hazardous whenever
inputs greater than 42V (dc or peak) are connected to ANY input terminal.
– Permanent wiring of hazardous voltage or sources capable of delivering
grater than 150 VA should be labeled, fused, or in some other way
protected against accidental bridging or equipment failure.
– DO NOT leave measurement terminals energized when not in use.
– DO NOT use the front/rear switch to multiplex hazardous signals between
the front and rear terminals of the multimeter.
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