HP LH4r HP Servers - Working In Comfort - Page 12

wic.book Page 8 Friday, December 5, 1997 11:24 AM Working in Comfort Preparing Your Work Environment Lighting Proper lighting can help you avoid eye discomfort. Lighting in your area should allow easy reading of documents and keyboard legends. If more light is needed for a particular task, use individual task lighting rather than increasing the general lighting. Incoming light should be shielded or diffused to prevent glare and reflection. In cases where strong sunlight is a problem, curtains, adjustable shades, anti-glare filters or monitor hoods are possible solutions. Work Environment Specifications • For better eye comfort in your work environment, you should avoid reflective surface coverings. The ceiling, walls, and floors should have a medium level of reflectance (approximately 75 percent, 40 percent, and 30 percent, respectively). Try to avoid excessive contrast between the screen and its surroundings. • The work environment should be as quiet and free of distraction as possible, with background noise below 55 dBA. • Where possible, relative air humidity should be in the range of 40 to 60 percent. • The recommendation for room temperature is 19 to 23 degrees C (66 to 73 degrees F). The workplace should be well ventilated, as with any indoor environment. • Recommended work surface space is 160 cm wide by 80 to 90 cm deep (63 inches by 32 to 36 inches deep), or a corner unit of 91 to 107 cm deep (36 to 42 inches). The recommended vertical adjustment range is 66 to 77 cm (26 to 30 inches). If the height is fixed, it should be between 72 and 75 cm (28.5 to 29.5 inches). • There should be at least 6 cm (2 inches) between your thighs and the work surface. If the surface has a kneehole, it should be at least 58 cm (23 inches) wide, 65 cm (25.5 inches) high, and 60 cm (24 inches) deep. 8