HP 8642A Operation And Calibration Manual page 4

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