Model WF30 Display Mode CIELAB、CIELCH Color Difference Formula △E*ab Illumination Condition CIE Recommendation：8/d Light Source LED blue excitation Sensor Photodiode array Measurement Caliber φ4mm/φ8mm/φ16mm Alternative Measurement Condition " Observer：CIE 10° Standard observer Light source: D50 D65 F11(TL84) Contain light way：SCI SCE" Measurement Range L: 0 to 100 Repeated Accuracy △E<0.05 (take the deviation average after 30 times measuring the whiteboard) Table Difference △E<0.2 Measurement Interval 0.5 Sec. Storage Capacity " Type sample data : 100 with testing sample data: 200 Language Patterns English Battery Charging Time 8 hrs Battery Li-ion battery, 5000 times Measurement Lifetime of Bulb 5 years more than 1.6 million measurements Display Screen TFT true color 2.8inch@(16:9) Resolution ratio:400x240 Interface of External USB2.0 (USB-B)- data communication with 《color analysis system》software RS-232 (115200bps)- connected with micro printer Working Temperature Range 0℃-40℃（32℉-104℉） Storage Temperature Range -20℃-50℃（-4℉-122℉） Humidity Range Relative humidity less than 85%,without condensation Weight 700g Size 199*68*90mm Size of Exterior Package 400*240*340mm Standard Accessories 3000mAH Li-ion battery/AC adapter/USB Data line/CD《Color analysis software》/User manual/Warranty card Optional Accessories Flour measuring device/Liquid measuring device/Micro printer Warranty: 3 year
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