HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 293
USDT Specifications, Specifications continued
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Table F-2 Specifications (continued) Typical (idle; standard PS) 307 BTU/hr 77 kg-cal/hr Maximum (85% Efficient PS) 999 BTU/hr 252 kg-cal/hr Typical (idle; 85% Efficient PS) 239 BTU/hr 60 kg-cal/hr Power Supply 115V 230V Operating Voltage Range 90-264 VAC 90-264 VAC Rated Voltage Range 100-240 VAC 100-240 VAC Rated Line Frequency 50-60 Hz 50-60 Hz Power Output 240 W 240 W Rated Input Current (maximum)1 Standard PS 4A @ 100 VAC 2A @ 200 VAC 85% Efficient PS 3.5A @ 100VAC 1.75A @ 200VAC 1 This system utilizes an active power factor corrected power supply. This allows the system to pass the CE mark requirements for use in the countries of the European Union. The active power factor corrected power supply also has the added benefit of not requiring an input voltage range select switch. USDT Specifications Table F-3 Specifications Desktop Dimensions (in the desktop position) Height Width Depth 2.60 in 9.90 in 10.00 in 6.6 cm 25.1 cm 25.4 cm (depth will increase if the computer is equipped with a port security bracket) Approximate Weight 6.95 lb Weight Supported (maximum distributed load in desktop position) 77 lb Temperature Range (values subject to change with increasing altitude above sea level) Operating 50° to 95° F Nonoperating -22° to 140° F 3.15 kg 35 kg 10° to 35° C -30° to 60° C NOTE: Operating temperature is derated 1.0° C per 300 m (1,000 ft) to 3,000 m (10,000 ft) above sea level, no direct sustained sunlight. Maximum rate of change is 10° C (50° F)/Hr. The upper limit may be limited by the type and number of options installed. Relative Humidity (noncondensing) Operating (28° C (82.4° F) max wet bulb) 10-90% 10-90% Nonoperating (38.7° C (101.66° F) max wet bulb) 5-95% 5-95% Maximum Altitude (unpressurized) Operating 10,000 ft 3,048 m Nonoperating 30,000 ft 9,144 m USDT Specifications 281