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Safety
Symbols
Genera]
definitions
of safety
symbols used on equipment
or
in
manuals.
±,
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
ground
terminal.
For protection
against
electrical
shock
in
case of
a
fault in
the instrument.
Used
with
wiring terminals to indicate the terminal
which
must be
connected
to
ground
before 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 in
the instrument.
A
terminal
marked
with
this
symbol
must
be
connected
to
ground
in
the
manner
described
in
the
installation
(Operation)
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
structures
Alternating current
(power
line).
Direct
current
(power
line).
Alternating or direct current
(power
line).
Warning
Caution
Note
<0
Warning
denotes
a
hazard.
It
calls
attention to
a procedure,
practice,
condition
or the
like,
which,
if
not
correctly
performed
or
adhered
to,
could
result
in
injury
or
death
to
personnel.
Caution
sign
denotes a
hazard.
It
calls
attention
to
a procedure,
practice,
condition or the
like,
which,
if
not
correctly
performed
or
adhered
to,
could
result
dxinmge
to
or destruction of part or
all
of the product.
Note
denotes important
information.
It
calls
attention to
a procedure,
practice,
condition or the
like,
which
is
essential to highlight.
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