HP 6720t Getting Started - Windows XP - Page 49

466202-002.book Page 45 Wednesday, February 20, 2008 11:44 PM Product information Operating environment The operating environment information in the following table may be helpful if you plan to use or transport the computer in extreme environments. Factor Metric U.S. Temperature Operating (reading to an optical disc) 0°C to 35°C 32°F to 95°F Nonoperating -20°C to 60°C -4°F to 140°F Relative humidity (noncondensing) Operating 10% to 90% 10% to 90% Nonoperating 5% to 95% 5% to 95% Maximum altitude (unpressurized) Operating (14.7 to 10.1 psia*) -15 m to 3,048 m -50 ft to 10,000 ft Nonoperating (14.7 to 4.4 psia*) -15 m to 12,192 m -50 ft to 40,000 ft *Pounds per square inch absolute (psia) is a unit of measurement for altitude. Rated input power The power information in this section may be helpful if you plan to travel internationally with the computer. The computer operates on DC power, which can be supplied by an AC or a DC power source. Although the computer can be powered from a standalone DC power source, it should be powered only with an AC adapter or a DC power source supplied and approved by HP for use with this computer. The computer is capable of accepting DC power within the following specifications. Input power Operating voltage Operating current Rating 18.5 V dc @ 3.50 A - 65 W 3.50 A This product is designed for IT power systems in Norway with phase-to-phase voltage not exceeding 240 V rms. Getting Started 45