Hunter Associates Laboratory, Inc.

ColorFlex EZ Citrus Spectrophotometer

ColorFlex EZ Citrus Spectrophotometer

The easy-to-use ColorFlex EZ Citrus is specifically designed to accurately measure the Citrus Number, Citrus Redness and Citrus Yellowness. This accuracy is achieved by using 45º/0º optical geometry, the only measurement technology proven to measure color the way the human eye sees it.

Easy-to-use. Compact. And Increased Performance. ColorFlex EZ Citrus Spectrophotometer gives you unsurpassed confidence and trust in your outcomes.

The ColorFlex EZ Citrus measures Citrus Number, Citrus Redness and Citrus Yellowness. These indices were primarily intended to score orange juice concentrate, but in practice have also been used for grapefruit and lemon juices. In addition to the citrus values, the instrument can also measure in terms of the Hunter Lab scale as well as other widely used color scales. Thus the system can also be used to measure the reflected color of virtually any opaque or semi-opaque liquid.

The system comes complete with a sample tube holder, stand, clamp and a calibrated plastic O.J. standard. The instrument has a large, easy-to-read display and a sealed keypad. It requires very little bench space, and is very easy to use. In practice, the juice sample is poured into a test tube or capped tube. The tube is inserted into the instrument tube holder. By pressing one button on the instrument the measurement is made. CN (Citrus Number), CR (Citrus Redness) and CY (Citrus Yellowness) will simultaneously be displayed. The ColorFlex EZ Citrus can be connected to a printer if hard copy data is desired.

• Measures the reflected color of solids and liquids
• Product-standard storage with Pass/Fail tolerances
• Displays Color Data, Color Plot, Spectral Data and Spectral Plots
• 45°/0° measurement geometry
• Requires very little bench space
• Can be connected to a printer or a PC
• Compatible with PC based EasyMatch QC quality control software

Product Specifications

Measurement

Measurement Principle: Port up or Port forward dual-beam spectrophotometer

Geometry: Directional annular 45° illumination / 0° viewing

Spectrophotometer: Sealed optics; 256-element diode array and a high resolution concave holographic grating

Port Diameter/View Diameter: 31.8 mm (1.25 in) illuminated/ 25.4 mm (1 in) measured

Specular Component: Excluded

Spectral Range: 400 nm - 700 nm

Spectral Resolution:

Effective Bandwidth: 10 nm equivalent triangular

Reporting Interval: 10 nm

Photometric Range: 0 to 150 %

Light Source: Pulsed Xenon Lamp

Flashes per Measurement: 1 flash

Lamp Life: > 1 million flashes

Measurement Time:

Minimum Interval Between Measurements: 3 seconds

Standards Conformance: CIE 15:2004, ISO 7724/1, ASTM E1164, DIN 5033, Teil 7 and JIS Z 8722 Condition C

Standards Traceability: Instrument standard assignment in accordance with National Institute of Standards and Technology (NIST) following practices described in CIE Publication 44 and ASTM E259

Performance

Inter-Instrument Agreement:

• ∆E*

  Colorimetric Repeatability: ∆E*

  Firmware

  Data Views: Color Data, Color Difference Data, Tristimulus Color Plot, Spectral Data, Spectral Difference Data, Spectral Plot, Spectral Difference Plot

  USB Flash Drive Features: Backup of Setups and Data, Setup Transfer to Multiple Units, Data Export to Excel

  Other Features: Pass/Fail, Average Multiple Readings, Search for Closest Standard

  Illuminants: A, C, D50, D55, D65, D75, F2, F7, F11

  Observers: 2° and 10°

  Color Scales: CIE L*a*b*, Hunter Lab, CIE L*C*h, CIE Yxy, CIE XYZ

  Color Difference Scales: ∆L*a*b*, ∆Lab, ∆L*C*H, ∆L*C*h, ∆Yxy, ∆XYZ

  Color Difference Indices: ∆E*, ∆E, ∆C*, ∆C and ∆Ecmc

  Indices and Metrics: E313 Whiteness and Tint (C/2° or D65/10°), E313 Yellowness (C/2° or D65/10°), D1925 Yellowness (C/2°), Y Brightness, Z%, 457 nm Brightness, Opacity, Color Strength (Average and Single Wavelength), Gray Change, Gray Stain, Metamerism Index, Shade Number

  Citrus Color Model Only: Citrus Number, Citrus Redness, Citrus Yellowness Data Storage:

  Languages: Chinese, English, French, German, Italian, Japanese, Spanish

  Physical/Electrical

  Dimensions:

  Display: 7.1 cm x 5.4 cm (2.8 in. x 2.1 in.) backlit color LCD

  Interface: 3 USB 2.0 ports

  Power: 100 to 240 VAC 47 to 63 Hz

  Operating Environment: 10° to 40°C (50° to 104° F), 10 % to 90 % RH, noncondensing

  Storage Environment: -20° to 65°C (-5° to 150° F), 10 % to 90 % RH, noncondensing

  Standard Accessories:

  • ∆E*
    • As Standard - 250 spectral or tristimulus with Pass/Fail tolerances as Working, Physical, Numeric and Hitch
    • As Sample - 2000 spectral
    • Height: 16 cm (6.3 in.)
    • Width: 13 cm (5.1 in.)
    • Depth: 36 cm (14.2 in.)
    • Weight: 4.5 kg (9.9 lbs)
    • Calibrated instrument white tile
    • Certificate of traceability
    • Black glass
    • Green diagnostic tile
    • Universal AC adaptor
    • Computer interface cable
    • USB flash drive
    • ColorFlex EZ User guide