General Safety Considerations; Markings - HP E4418A Service Manual

Equipment Operation

General Safety Considerations

WARNING
Caution

Markings

vi
Before this instrument is switched on, make sure it has
been properly 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.
Any adjustments or service procedures that require operation of
the instrument with protective covers removed should be
performed only by trained service personnel.
Group 1
ISM
Class A
The CE mark shows that the product complies with
all the relevant European legal Directives (if
accompanied by a year, it signifies when the design
was proven.
This is the symbol of an Industrial Scientific and
Medical Group 1 Class A product.
The CSA mark is a registered trademark of the
Canadian Standards Association.
External Protective Earth Terminal.
While this is a Class I product, provided with a
protective earthing conductor in a power cord, an
external protective earthing terminal has also been
provided. This terminal is for use where the earthing
cannot be assured. At least an 18AWG earthing
conductor should be used in such an instance, to
ground the instrument to an assured earth terminal.
HP EPM-441A/442A Service Guide