Lenovo ThinkCentre M51 Hardware Maintenance Manual - Page 50

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Types 8098, 8171, 8172, 8173, 8424, and 8425 This section lists the physical specifications. Dimensions Airflow Width: 12.2 inches (310 mm) Height: 3.35 inches (85 mm) Approximately 14 cubic feet (0.45 cubic meters) per minute Depth: 14.1 inches (358 mm) Weight Minimum configuration as shipped: 7.3 kg (16 lbs) Maximum configuration as shipped: 8.5 kg (18.7 lbs) Environment Air temperature: Operating at 0 - 3000 ft (914.4 m): 10° to 35°C (50° to 95°F) Operating at 3000 ft - 7000 ft (2134 m): 10° to 32°C (50° to 89.6°F) Non-operating: 10° to 43°C (50° to 110°F) Humidity: Operating: 8% to 80% Non-operating: 8% to 80% Transit: 8% to 90% Maximum altitude: 7000 ft (2133.6 m) Electrical input Input voltage: Low range: Minimum: 90 V ac Maximum: 137 V ac Input frequency: 50/60 Hz Voltage switch setting: 115 V ac High range: Minimum: 180 V ac Maximum: 265 V ac Input frequency: 50/60 Hz Voltage switch setting: 230 V ac Input kilovolt-amperes (kVA) (approximate): Minimum configuration as shipped: 0.09 kVA Maximum configuration: 0.23 kVA Heat output (approximate) in British thermal units (Btu) per hour: Minimum configuration: 205.8 Btu/hr (60 watts) Acoustical noise-emission values Note: In this computer, fan speed is controlled by temperature, configuration, and software. Actual noise-emission values might be different from the stated values depending on the number of fans and the speed of the fans. Average sound-pressure levels for computers with a microprocessor that runs at or below 2.8 GHz: At operator position - 0.5 meters: Idle: 30 dBA Operating: 34 dBA At bystander position - 1 meter (3.3 ft): Idle: 26 dBA Operating: 29 dBA Declared (upper limit) sound-power levels: Idle: 4.0 bels Operating: 4.3 bels Average sound-pressure levels for computers with a microprocessor that runs at greater than 2.8 GHz: At operator position - 0.5 meters: Idle: 31 dBA Operating: 34 dBA At bystander position - 1 meter (3.3 ft): Idle: 26 dBA Operating: 29 dBA Declared (upper limit) sound-power levels: Idle: 4.0 bels Operating: 4.3 bels Note: These levels were measured in controlled acoustical environments according to the procedures specified by the American National Standards Institute (ANSI) S12.10 and ISO 7779 and are reported in accordance with ISO 9296. Actual sound-pressure levels in a given location might exceed the average values stated because of room reflections and other nearby noise sources. The declared sound-power levels indicate an upper limit, below which a large number of computers will operate. Maximum configuration: 548.8 Btu/hr (160 watts) 44 Hardware Maintenance Manual

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Types
8098,
8171,
8172,
8173,
8424,
and
8425
This
section
lists
the
physical
specifications.
Dimensions
Width:
12.2
inches
(310
mm)
Height:
3.35
inches
(85
mm)
Depth:
14.1
inches
(358
mm)
Weight
Minimum
configuration
as
shipped:
7.3
kg
(16
lbs)
Maximum
configuration
as
shipped:
8.5
kg
(18.7
lbs)
Environment
Air
temperature:
Operating
at
0
-
3000
ft
(914.4
m):
10°
to
35°C
(50°
to
95°F)
Operating
at
3000
ft
-
7000
ft
(2134
m):
10°
to
32°C
(50°
to
89.6°F)
Non-operating:
10°
to
43°C
(50°
to
110°F)
Humidity:
Operating:
8%
to
80%
Non-operating:
8%
to
80%
Transit:
8%
to
90%
Maximum
altitude:
7000
ft
(2133.6
m)
Electrical
input
Input
voltage:
Low
range:
Minimum:
90
V
ac
Maximum:
137
V
ac
Input
frequency:
50/60
Hz
Voltage
switch
setting:
115
V
ac
High
range:
Minimum:
180
V
ac
Maximum:
265
V
ac
Input
frequency:
50/60
Hz
Voltage
switch
setting:
230
V
ac
Input
kilovolt-amperes
(kVA)
(approximate):
Minimum
configuration
as
shipped:
0.09
kVA
Maximum
configuration:
0.23
kVA
Heat
output
(approximate)
in
British
thermal
units
(Btu)
per
hour:
Minimum
configuration:
205.8
Btu/hr
(60
watts)
Maximum
configuration:
548.8
Btu/hr
(160
watts)
Airflow
Approximately
14
cubic
feet
(0.45
cubic
meters)
per
minute
Acoustical
noise-emission
values
Note:
In
this
computer,
fan
speed
is
controlled
by
temperature,
configuration,
and
software.
Actual
noise-emission
values
might
be
different
from
the
stated
values
depending
on
the
number
of
fans
and
the
speed
of
the
fans.
Average
sound-pressure
levels
for
computers
with
a
microprocessor
that
runs
at
or
below
2.8
GHz:
At
operator
position
-
0.5
meters:
Idle:
30
dBA
Operating:
34
dBA
At
bystander
position
-
1
meter
(3.3
ft):
Idle:
26
dBA
Operating:
29
dBA
Declared
(upper
limit)
sound-power
levels:
Idle:
4.0
bels
Operating:
4.3
bels
Average
sound-pressure
levels
for
computers
with
a
microprocessor
that
runs
at
greater
than
2.8
GHz:
At
operator
position
-
0.5
meters:
Idle:
31
dBA
Operating:
34
dBA
At
bystander
position
-
1
meter
(3.3
ft):
Idle:
26
dBA
Operating:
29
dBA
Declared
(upper
limit)
sound-power
levels:
Idle:
4.0
bels
Operating:
4.3
bels
Note:
These
levels
were
measured
in
controlled
acoustical
environments
according
to
the
procedures
specified
by
the
American
National
Standards
Institute
(ANSI)
S12.10
and
ISO
7779
and
are
reported
in
accordance
with
ISO
9296.
Actual
sound-pressure
levels
in
a
given
location
might
exceed
the
average
values
stated
because
of
room
reflections
and
other
nearby
noise
sources.
The
declared
sound-power
levels
indicate
an
upper
limit,
below
which
a
large
number
of
computers
will
operate.
44
Hardware
Maintenance
Manual