Operating environment, Electrical current safety information, Operating – Lenovo ThinkCentre M57e User Manual
Page 20: Environment, Electrical, Current, Safety, Information
v
Remove
dust
from
vents
and
any
perforations
in
the
bezel.
More
frequent
cleanings
might
be
required
for
computers
in
dusty
or
high-traffic
areas.
v
Do
not
restrict
or
block
any
ventilation
openings.
v
Do
not
store
or
operate
your
computer
inside
furniture,
as
this
might
increase
the
risk
of
overheating.
v
Airflow
temperatures
into
the
computer
should
not
exceed
35°
C
(95°
F).
v
Do
not
use
non-desktop
air
filtration
devices.
Operating
environment
The
optimal
environment
in
which
to
use
your
computer
is
10°C-35°C
(50°F-95°F)
with
humidity
ranging
between
35%
and
80%.
If
your
computer
is
stored
or
transported
in
temperatures
less
than
10°C
(50°F),
allow
the
cold
computer
to
rise
slowly
to
an
optimal
operating
temperature
of
10°C-35°C
(50°F-95°F)
before
use.
This
process
could
take
two
hours
in
extreme
conditions.
Failure
to
allow
your
computer
to
rise
to
an
optimal
operating
temperature
before
use
could
result
in
irreparable
damage
to
your
computer.
If
possible,
place
your
computer
in
a
well-ventilated
and
dry
area
without
direct
exposure
to
sunshine.
Keep
electrical
appliances
such
as
an
electric
fan,
radio,
high-powered
speakers,
air
conditioner,
and
microwave
oven
away
from
your
computer
because
the
strong
magnetic
fields
generated
by
these
appliances
can
damage
the
monitor
and
data
on
the
hard
disk
drive.
Do
not
place
any
beverages
on
top
of
or
beside
the
computer
or
other
attached
devices.
If
liquid
is
spilled
on
or
in
the
computer
or
an
attached
device,
a
short
circuit
or
other
damage
might
occur.
Do
not
eat
or
smoke
over
your
keyboard.
Particles
that
fall
into
your
keyboard
can
cause
damage.
Electrical
current
safety
information
DANGER
Electrical
current
from
power,
telephone,
and
communication
cables
is
hazardous.
To
avoid
a
shock
hazard:
v
To
prevent
possible
shock
hazard,
do
not
use
your
computer
during
a
lightning
storm.
v
Do
not
connect
or
disconnect
any
cables
or
perform
installation,
maintenance,
or
reconfiguration
of
this
product
during
an
electrical
storm.
16
Safety
and
Warranty
Guide