HP 339A - Safety Symbols; Symbol Definitions

SAFETY SYMBOLS
General Definitions of Safety Symbols
Used
On
Equipment
or In
Manuals.
h
r±-
OR
(-±r
rh
OR
Instruction
manual symbol:
the
product
will
be
marked
with this
symbol
when it is
necessary
for
the
user to
refer to the
instruction
manual in
order to
protect
against
damage
to the
instrument.
Indicates
dangerous
voltage
(terminals
fed
from the
interior by
voltage exceeding
1000
volts
must
be so
marked).
Protective
conductor
terminal.
For
protection against
electrical
shock
in case
of a
fault.
Used
with
field
wiring
terminals
to
in-
dicate
the
terminal
which
must
be
conne
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gl
UU1IU UCi
Ol V
operating
equipment.
Low-noise
or
noiseless,
clean
ground
(earth)
terminal. Used
for
a
signal
common,
as
well
as
providing
protection
against
electrical
shock
in case
of a
fault.
A
terminal
marked
with
this symbol
must
be
connected
to
ground in
the
manner
described
in the
installation
(operating)
manual,
and
before
operating
the
equipment.
Frame
or chassis
terminal.
A
connection
to
the
frame (chassis)
of
!
the
equipment
which
normally
includes
all
exposed metal
struc-
tures.
Alternating
current
(power line).
Direct
current
(power line).
Alternating
or
direct
current
(power line).
WARNING
|
1
i
CAUTION
3
The
WARNING
sign
denotes a
hazard. It
calls attention to a
pro-
cedure,
practice,
condition or
the
like,
which, if not correctly
per-
formed
or
adhered
to,
could
result
in
injury or
death to
personnel.
The
CAUTION
sign
denotes a
hazard. It
calls attention
to
an
operating
procedure,
practice,
condition or the
like,
which, if not
correctly
performed
or
adhered
to,
could result in
damage
to or
destruction
of
part or
all
of the
product.
NOTE:
The NOTE
sign
denotes
important
information. It
calls
attention
to
procedure,
practice,
condition
or
the
like,
which is
essential
to
highlight.