Lenovo ThinkCentre M51 Hardware Maintenance Manual - Page 48
Types - 8141
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Types 8095, 8096, 8141, 8142, 8145, 8420, and 8421 This section lists the physical specifications. Dimensions Height: 146 mm (5.7 in.) Width: 442 mm (17.4 in.) Depth: 401 mm (15.8 in.) Heat output (approximate) in British thermal units (Btu) per hour: Minimum configuration: 256 Btu/hr (75 watts) Maximum configuration: 1058 Btu/hr (310 watts) Weight Airflow Minimum configuration as shipped: 11 kg (24 lb) Maximum configuration: 14 kg (31 lb) Approximately 1.13 cubic meters per minute (40 cubic feet per minute) maximum Environment Air temperature: System on: 10° to 35°C (50° to 95° F) System off: 10° to 43°C (50° to 110° F) Acoustical noise-emission values Average sound-pressure levels: At operator position: (0.5 meters) Idle: 33 dBA Maximum altitude: 2134 m (7000 ft) Operating: 35 dBA Note: The maximum altitude, 2134 m (7000 ft), is the At bystander position - 1 meter (3.3 ft): maximum altitude at which the specified air temperatures apply. At higher altitudes, the maximum air temperatures are lower than those specified. Idle: 29 dBA Operating: 31 dBA Humidity: Declared (upper limit) sound-power levels: System on: 8% to 80% Idle: 4.3 bels System off: 8% to 80% Operating: 4.4 bels Electrical input Input voltage: Low range: Minimum: 90 V ac Maximum: 180 V ac Input frequency: 50/60 Hz Voltage switch setting: 115 V ac 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. High range: Minimum: 137 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: 0.08 kVA Maximum configuration: 0.25 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. 42 Hardware Maintenance Manual