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 uninterruptible 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
A
Instruction manual symbol: the product will
be m a r k e d w i t h t h i s s y m b o l w h e n it
is necessary for the user to refer to the instruction
manual (refer to Table of Contents).
L.
Indicates hazardous voltages.
—
Indicates earth (ground) terminal.
WARNING
WARNING
]
The W A R N I N G sign denotes a
h a z a r d . It calls a t t e n t i o n 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.
CAUTION
The CAUTION sign denotes a haz
a r d . I t calls a t t e n t i o n t o 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.
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 service-
trained personnel only. To avoid
dangerous
electric shock, do not perform any servicing
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
available 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 fuse(s) 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
fuseholders.