Specifications Model NH310 precise colorimeter Display Mode CIE L*a*b; CIE XYZ; CIE RGB;CIEL*u*v; CIE*C*H; Whiteness &Yellowness; Color Fastness Color Difference Formula ΔE*ab; ΔL*ab; ΔE*C*H; ΔECIE94; ΔEHunter Illuminating/viewing geometry 8/d (8°illumination angle/diffuse viewing) Light Source LED blue light excitation Detector Silicon photoelectric diode Measuring Aperture Φ8mm; Φ4mm; Φ8mm extended aperture (optional) Measuring Conditions Observer: CIE 10° Standard Observer Illuminant: CIE Standard Illuminant D65; D50; A Measuring Range L: 0 to 100 Repeatability Standard deviation within ΔE*ab 0.06 (Measurement Conditions: Average of 30 measurements of standard white plate) Storage 100 pcs standard samples; 20000 pcs test samples Minimum Interval Between Measurement Approx. 1 sec Battery Life More than 3000 measurements Lamp Life more than 1.6 million times in 5 years Display TFT True-color; 2.8 inch@(16:9) Interface Model B: USB RS-232: Baud rate 19200bps Operating Temperature Range -10°C to 40°C (14°F to 104°F) Storage Temperature -20°C to 50°C (-4°F to 122°F) Humidity Range less than 85% relative humidity, no condensation Weight 500g Dimensions 205 x 70 x 100 mm Size of the Packing 435 x 205 x 345mm Standard Accessories AC Adapter; Li-ion Battery; Operation Manual; Software CD; USB Cable; White Calibration Cover; Φ8mm Measuring Aperture; Φ4mm Measuring Aperture Optional Accessories Extended Aperture(Φ8mm); Mini-printer; Printer Cable, Universal Test Components, Powder Test Box