Chapter 3. Physical specifications 19
Physical specifications — A20 desktop model
Dimensions
Height: 140 mm (5.5 in.)
Width: 425 mm (16.7 in.)
Depth: 425 mm (16.7 in.)
Weight
Minimum configuration as shipped: 9.4 kg (20 lb)
Maximum configuration: 11.3 kg (25.0 lb)
Environment
Air temperature:
System on: 10° to 35°C (50° to 95° F)
System off: 10° to 43° C (50° to 110° F)
Maximum altitude: 2134 m (7000 ft)
Note: The maximum altitude, 2134 m (7000 ft),
is the maximum altitude at which the
specified air temperatures apply. At
higher altitudes, the maximum air
temperatures are lower than those
specified.
Humidity:
System on: 8% to 80%
System off: 8% to 80%
Electrical input
Input voltage:
Low range:
Minimum: 90 V ac
Maximum: 137 V ac
Input frequency range: 57–63 Hz
Voltage switch setting: 115 V ac
High range:
Minimum: 180 V ac
Maximum: 265 V ac
Input frequency range: 47–53 Hz
Voltage switch setting: 230 V ac
Input kilovolt-amperes (kVA) (approximate):
Minimum configuration as shipped: 0.52 kVA
Maximum configuration: 1.50 kVA
Note: Power consumption and heat output vary
depending on the number and type of optional
features installed and the power-management
optional features in use.
Heat output (approximate in British thermal units (Btu) per
hour:
Minimum configuration: 240 Btu/hr (75 watts)
Maximum configuration: 705 Btu/hr (207 watts)
Airflow
Approximately 0.5 cubic meters per minute (18 cubic
feet per minute) maximum
Acoustical noise-emission values
Average sound-pressure levels:
At operator position:
Idle: 38 dBA
Operating: 43 dBA
At bystander position - 1 meter (3.3 ft):
Idle: 33 dBA
Operating: 37 dBA
Declared (upper limit) sound-power levels:
Idle: 4.5 bels
Operating: 4.8 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.
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