E
2-1
2.
INSTALLATION
INSTRUCTIONS
2.1.
INITIAL INSPECTION
Check the contents
of
the shipment for
completeness
and note
whether
any damage has occurred during
transport. If
the
contents are
incomplete, or
there
is damage, a
claim should be filed
with the
carrier
immediately, and
the Philips Sales or
Service
organisation
should be
notified
in order to facilitate the
repair
or replacement
of the instrument.
2.2. SAFETY INSTRUCTIONS
Upon delivery from the
factory the
instrument complies with the required safety regulations,
see para.
1.2.1.
To maintain
this
condition and to ensure safe operation, the
instructions
below must carefully
be
followed.
2.2.1.
Maintenance and
repair
Failure and
excessive stress:
If the instrument is
suspected of being unsafe, take
it
out
of operation permanently.
This
is the case when the
instrument
—
shows
physical damage
—
does not function
anymore
—
is stressed beyond the
tolerable limits (e.g.
during storage and transportation)
Dismantling the instrument:
When removing covers or other parts by
means
of tools, live parts or ter-
minals could be exposed.
Before
opening
the instrument,
disconnect it from
all power sources.
If the open live
instrument needs calibration,
maintenance
or
repair, it
must be performed only
by
trained personnel being aware of the
risks. After disconnection from all power sources,
the capacitors
in the instrument may,
remain charged for some seconds.
2.2.2. Earthing (grounding)
Before
any
other connection is made the
instrument shall be connected
to
a protective
earth conductor
via the three-core mains
cable. The mains plug shall be
inserted
only
into
a
socket
outlet provided with
a
protective earth contact.
The protective
action
shall not be negated by the
use of an extension cord
without protective conductor.
The GUARD connection
must not
be
used to connect a protective conductor.
WARNING: Any- interruption of the
protective conductor inside or outside the instrument, or dis-
connection
of
the protective earth terminal, is likely to make the instrument dangerous.
I ntentional
interruption
is
prohibited
.
2.2.3.
GUARD
connection;
The circuit earth potential is applied to the GUARD
connection
and
is connected
to
the
cabinet by
means of a
parallel-connected
capacitor
and resistor.
By
this means hum loops are
avoided and a
clear
HF earthing is obtained.
•
If
the
circuit
earth
potential in
a
measurement set-up is different from the
protective earth
potential,
it must be noticed, that the GUARD connection can be
touched and that
it must not be
live, see the
safety regulations
on the subject (VDE
0411).
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