HP 8447A - Safety Considerations; Safety Symbols

SAFETY CONSIDERATIONS
GENERAL — This is a Safety Class I instrument
(provided with terminal for protective earthing).
OPERATION — BEFORE APPLYING POWER
verify that the power transformer primary is
matched to the available line' voltage, the correct
fuse is installed, and Safety Precautions are taken
(see the following warnings). In addition, note the
instrument’s external markings which are
described under “Safety Symbols.”
warnings!
Servicing instructions are for use by service-
trained personnel only. To avoid dangerous elec¬
tric shock, do not perform any servicing unless
qualified to do so .
BEFORE SWITCHING ON THE INSTRUMENT,
the protective earth terminal of the instrument
must be connected to the protective conductor of
the (mains) power cord. The mains plug shall only
be inserted in a socket outlet provided with a pro¬
tective earth contact. The protective action must
not be negated by the use of an extension cord
(power cable) without a protective conductor
(grounding). Grounding one conductor of a two
conductor outlet provides no protection.
If this instrument is to be energized via an auto-
transformer (for voltage reduction) make sure the
common terminal is connected to the neutral termi¬
nal of the power source.
Any interruption of the protective (grounding)
conductor (inside or outside the instrument) or
disconnecting the protective earth terminal will
cause a potential shock hazard that could result
in personal injury.
Whenever it is likely that the protection has been
impaired, the instrument must be made inoperative
and be secured against any unintended operation.
Only fuses with the required rated current, voltage,
and specified type (normal blow, time delay, etc.)
should be used. Do not use repaired fuses or short
circuited fuseholders. To do so could cause a shock
or fire hazard.
Do not operate the instrument in the presence of
flammable gases or fumes. Operation of any elec¬
trical instrument in such an environment consti¬
tutes a definite safety hazard.
Do not install substitute parts or perform any un¬
authorized modification to the instrument.
Adjustments described in the manual are per¬
formed with power supplied to the instrument
while protective covers are removed. Energy avail¬
able at many points may, if contacted, result in
personal injury.
Any adjustment, maintenance, and repair of the
opened instrument under voltage should be
avoided as much as possible, and when inevitable,
should be carried out only by a skilled person who
is aware of the hazard involved.
Capacitors inside the instrument may still be
charged even if the instrument has been discon¬
nected from its source of supply.
SAFETY SYMBOLS
Instruction manual symbol: the
product will be marked with this
symbol when it is necessary for
the user to refer to the instruc¬
tion manual in order to protect
against damage to the product.
Indicates hazardous voltages.
Earth terminal (sometimes used
in manual to indicate circuit
common connected to grounded
chassis).
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 injury. Do not proceed
beyond a WARNING sign until
the indicated conditions are fully
understood and met.
The CAUTION sign denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like, which, if not correctly
performed or adhered to. could
result in damage to or destruc¬
tion of part or all of the product.
Do not proceed beyond a CAU¬
TION sign until the indicated
conditions are fully understood
and met.
/h
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WARNING |
CAUTION