Dell Precision 490 Desktop User's Guide - Page 95
Caring for Your Computer
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Operating Storage Relative humidity Maximum vibration: Operating Storage Maximum shock: Operating Storage Altitude: Operating Storage 10° to 35°C (50° to 95°F) -40° to 65°C (-40° to 149°F) 20% to 80% (noncondensing) 5 to 350 Hz at 0.0002 G2/Hz 5 to 500 Hz at 0.001 to 0.01 G2/Hz 40 G +/- 5% with pulse duration of 2 msec +/- 10% (equivalent to 20 in/sec [51 cm/sec]) 105 G +/- 5% with pulse duration of 2 msec +/- 10% (equivalent to 50 in/sec [127 cm/sec]) -15.2 to 3048 m (-50 to 10,000 ft) -15.2 to 10,668 m (-50 to 35,000 ft) Caring for Your Computer To help maintain your computer, follow these suggestions: l To avoid losing or corrupting data, never turn off your computer when the hard drive light is on. l Schedule regular virus scans using virus software. l Manage hard drive space by periodically deleting unnecessary files and defragmenting the drive. l Back up files on a regular basis. l Periodically clean your monitor screen, mouse, and keyboard (see Cleaning Your Computer). Back to Contents Page