Lenovo C300 Lenovo 3000 C300 Safety and Warranty Guide(AIO) V1.1 - Page 22

Set the monitor and screen to be on the even level with or slightly lower level than your line of sight Adjust the elevation of the monitor to a comfort angle of view Keep your wrists in a comfort and relaxed position Keep your forearms on the even level with the desktop Keep your feet on the floor steadily 1. To avoid unexpected failure, pay attention to ensure the computer to operate within the scope of environmental specifications and: Adaptability index for product operation environment Adaptability for power supply Operating temperature Relative operation humidity Storage & transportation temperature Relative humidity for storage & transportation Atmosphere pressure 220V ±22V, 50Hz ±1Hz 10˚C - 35˚C 35% - 80% -20˚C - 35˚C 20% - 93% (40˚C) 86 kPa - 106 kPa Warning It will cause irremovable failure when the computer is powered on immediately after it is moved from the environment with low temperature to the operating temperature, so make sure your computer to restore for more than 2 hrs under the operating temperature. 2. Select appropriate operating desks and seats and adjust their height to ensure your forearms are parallel with the floor while operating the keyboard and mouse, and your eyes are basically on the same level with the monitor, as well as ensure that your thighs are basically parallel with the floor and your feet can be placed on the floor steadily. Furthermore, you may also choose backrestadjustable seats to enhance your comfort. Safety and warranty guide (AIO) 17 31037314B_SWG(AIO)_EN_V1.1.indd 17 2009.4.13 2:55:17 PM