Keysight Technologies 34959A Service Manual page 5

Hazardous voltage levels capable of causing death, may be present on a
WARNING
channel. Use extreme caution when handling, testing and adjusting this
instrument. Any voltages greater than 30 Vrms, 42.4 Vpeak and 60 Vdc are
considered hazardous (IEC 61010-1).
ENVIRONMENTAL HEALTH & SAFETY: When any channel is connected to a
WARNING
hazardous voltage source, the instrument and the device under test should
be supervised, following local EHS practices to restrict access.
IN CASE OF DAMAGE
WARNING
Before use, inspect the instrument and all connections. Pay particular
attention to the insulation surrounding the connectors and / or cable
assembly insulation. NEVER use a cable showing any signs of damage.
Faulty cables can cause electrical shock and /or fire hazards and could lead
to personal injury or death.
Under certain conditions, hazardous voltage levels capable of causing injury
WARNING
or death may remain even after external circuits have been disconnected. To
avoid electrical shock, remove the main power cord from the 34980A and
ensure all connections to the DUT, including field wiring to the instrument
and the analog bus (if present) are deenergized and all circuits are
discharged before coming in contact with the system. Ensure no hazardous
voltages remain on any accessible before handling any part of the
instrument and test setup, making connections to the system, removing
covers or cleaning the instrument.
Keysight 34980A Service Guide 5