Konica Minolta CR series Chroma Meters are compact, lightweight, portable tristimulus colorimeters for measuring reflected color and color difference in a wide range of industrial fields. Five different CR-300 series models are available to meet the needs of various applications. All CR-300 series models offer improved inter-instrument agreement to allow multiple units to be used for color control both within a company and between companies.
The Chroma Meter CR-331 offers ø25mm measuring area and 45° bi-directional illumination/0° viewing geometry for accurate measurements of glossy surfaces.
Illuminating/viewing system
The measuring head of the CR-331 enables accurate measurements without the effect of specular reflection. In addition, the reading is averaged over a relatively wide ø25mm area to provide a more uniform response. Light from a pulsed xenon arc (PXA) lamp is projected onto the specimen surface from opposite sides at an angle of 45°. Only the light reflected perpendicular to the specimen surface is collected by an optical-fiber cable for color analysis.
- Shiny metal specimens should not be measured with this instrument since most of the color of the metal (gold, aluminum, etc.) will be reflected at the specular angle (45°)
Color-Control Applications
Paint Industry
Large surfaces during production.
Textile industry
Silk, metallic-fiber textiles, metal-coated textiles, etc.
Data Processor(DP-301) Features
Full portability for On-the-Go Color Control
Each CR-300 series Chroma Meter consists of a lightweight, handheld measuring head and a compact, battery-operable data-processor. The whole system is fully portable and can be used wherever the measurement subject is, indoors or outdoors, for on-the-spot color control.
Variety of Data-Processing Functions
The data processor of the CR-300 series Chroma Meters is an all-in-one unit with an LCD display, thermal printer, and RS-232C, remote-control, and ΔE*ab alarm terminals.
Data can be displayed, printed out, or output in a variety of color systems.
To provide the highest measurement accuracy, the data processor is equipped with a multicalibration function, which utilizes all calibration data in memory (calibration data can be stored in up to 20 memory channels) in calculating the measurement data. Users can also select a single calibration memory channel if desired.
Other features of the data processor include: Memory space for 300 sets of measurement data; 20 memory channels for target data for color difference measurements; statistical calculations; an interval timer for automatic, timer-controlled measurements; and a ΔE*ab alarm function.
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