HP 8591C User Manual page 10

Before the analyzer is switched
WARNING
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside or
outside the instrument, or disconnection of the protective earth terminal
can result in personal injury.
Before the analyzer is switched on, make sure its primary power circuitry has
CAUTION
been adapted to the voltage of the ac power source.
Failure to set the ac power input to the correct voltage could cause damage to
the instrument when the ac power cable is plugged in.
on, make sure it has been properly
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