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Marconi Instruments 2040 - Page 4

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WARNING
-
ELECTRICAL HAZARDS
AC
supply voltage. This equipment conforms with IEC Safety
Class
1,
meaning that it
is
provided with
a
protective grounding lead. To maintain this
protection the supply lead must
always be
connected to the source of supply via a socket with a
grounded contact.
Be aware that the supply filter contains
capacitors that may remain charged after the
equipment is disconnected from the
supply. Although the stored energy is within the approved
safety requirements, a
slight shock may be felt if the plug pins are touched
immediately after
removal.
Removal of
covers. Disconnect the supply before removing the
covers
so as to
avoid the
risk of exposing high
voltage parts. If any internal adjustment or servicing has to be carried out
with the supply on,
it must only be performed by a skilled person
who is aware of the hazard
involved.
Fuses. Note
that there are supply fuses in both the live and
neutral wires of the supply
lead. If only one of
these fuses should rupture, certain parts of the equipment
could remain at
supply
potential.
For Option 1G0
?
single fuse version only:
Fuses.
Note
that the internal supply fuse is in series
with the live (brown) conductor of
the supply lead. If
connection
is made to a
2-pin unpolarized supply socket, it is possible
for the
fuse to
become
transposed
to the neutral conductor, in which
case, parts of the equipment could
remain at
supply potential even after the fuse has ruptured.
HAZARD
Make sure that
only fuses
of
the
correct
rating and type are used
for replacement.
If
an integrally fused plug is used on the supply lead,
ensure that the fuse rating is
commensurate with the with current requirements of this
equipment. See under 'Performance
Data' in Chapter 1 for power requirements.
CAUTION
-
PULSE INPUT
Before switching the instrument on,
ensure
that
no signal voltage is present on the
PULSE INPUT
socket.