98English LCD panel ergonomic specificationsDesign viewing distance 500 mmDesign inclination angle 0.0°Design azimuth angle 90.0°Viewing direction range class Class IVScreen tilt angle 85.0°Design screen illuminance • Illuminance level:[250 + (250cosα)] lx where α = 85°• Color: Source D65Reflection class of LCD panel(positive and negative polarity)• Ordinary LCD: Class I• Protective or Acer CrystalBrite™ LCD:Class IIIImage polarity BothReference white:Pre-setting of luminance andcolor temperature @ 6500K(tested under BM7)• Yn• u'n• v'nPixel fault class Class II