Model
8642A/B
Safety
Considerations
SAFETY CONSIDERATIONS
GENERAL
This
product
and
related
documentation
must
be re-
viewed for familiarization with safety markings
and
instructions
before operation.
This
product
is a
Safety
Class I
instrument
(provided
with
a
protective
earth
terminal).
BEFORE APPLYING POWER
Verify
that
the
product
is
set
to
match
the
available
line voltage
and
the
correct fuse is installed.
SAFETY EARTH GROUND
An
un
interruptible
safety
earth
ground
must
be
pro-
vided from
the
main
power source
to
the
product
input
wiring terminals, power cord,
or
supplied power cord
set.
SAFETY SYMBOLS
Ij\
Instruction
ma~ual
sy~bol:
the
product
will
~
be
marked
wIth
thls
symbol
when
it
is
necessary for
the
user
to
refer to
the
instruction
manual
(refer
to
Table
of
Contents).
~
Indicates
hazardous voltages.
-::b-
Indicates
earth
(ground) terminal.
I
WARNING
I
The
WARNING
sign
denotes
a
hazard.
It
calls
attention
to
a
procedure, practice,
or
the
like, which,
if
not
correctly
performed
or
adhered
to, could result
in
personal
inju-
ry. Do
not
proceed
beyond
a
WARNING
sign
until
the
indicated
conditions
are fully
understood
and
met.
The
CAUTION
sign denotes a haz-
ard.
It
calls
attention
to
an
operating
procedure, practice,
or
the
like, which,
if
not
correctly
performed
or
adhered
to, could result
in
dam-
age
to
or
destruction
of
part
or
all
of
the
product. Do
not
proceed
beyond
a
CAUTION
sign
until
the
indi-
cated
conditions
are
fully
understood
and
met.
WARNING
I
Any
interruption
of
the protective (ground·
ing) conductor (inside or outside the
instru·
ment)
or disconnecting the protective
earth
terminal will cause a potential shock hazard
that
could result in personal injury. (Ground-
ing one conductor of a two conductor outlet
is
not
sufficient protection).
Whenever
it
is likely
that
the protection has
been impaired, the
instrument
must
be
made
inoperative and
be
secured against any
unin-
tended operation.
If
this
instrument
is
to
be
energized via an
autotransformer (for voltage reduction) make
sure the common terminal is connected
to
the
earth terminal
of
the power source.
Servicing instructions are for use by seruice-
trained personnel only. To avoid dangerous
electric shock,
do
not
perform
any
serVicmg
unless qualified
to
do
so.
Adjustments
described in the manual are per-
formed
with
power supplied
to
the
instrument
while protective covers are removed. Energy
auailable at
many
points
may,
if
contacted, re-
sult in personal injury.
Capacitors inside the
instrument
may
still
be
charged even
if
the
instrument
has been dis-
connected from its source
of
supply.
For continued protection against fire hazard,
replace the line (users) only
with
250V
fuse(s)
of
the same current rating and type (for exam-
ple, normal blow, time delay, etc.). Do
not
use
repaired
fuses
or
short
circuited
{useholders.
iii
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