Lexmark T642 Service Manual - Page 27

4061-xx0 Environment Printer temperature and humidity • Operating - Temperature: 16 to 32° C (60° to 90° F) - Relative humidity: 8 to 80% - Altitude: 10,000 ft. (0 to 3,048 meters) • Storage and shipping environment (packaged) - Temperature: -40° to 43° C (-40° to 110° F) - Relative humidity: 5% to 95% - Altitude: equivalent to 10,300 meters (0 to 34,000 feet) • Storage environment (unpacked) - Temperature: 0° to 40° C (32° to 104° F) - Relative humidity: 5% to 80% Acoustics All measurements are made in accordance with ISO 7779 and conform with ISO 9296. Model Status 1 Meter average sound pressure Lexmark T640(n) Idle (standby mode) 30 dBA Simplex printing 53 dBA Duplex printing 55 dBA Lexmark T642(n) Idle (standby mode) 32 dBA Simplex printing 54 dBA Duplex printing 57 dBA Lexmark T644(n) Idle (standby mode) 30 dBA Simplex printing 55 Duplex printing 58 Note: Measurements apply to 300 dpi, 600 dpi, and 1200 dpi printing. Declared sound power 4.0 Bels 6.7 Bels N/M Bels 4.7 Bels 6.8 Bels N/M Bels 4.5 7.0 N/M General information 1-7