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The split-radiance illuminometer CL-500A uses the principle of splitting. The built-in grating and sensor array allow it to analyze the source spectrum and calculate the color rendering index of the source through the spectral data formula. The color rendering index is an important evaluation criterion for the definition of the spectral properties and light quality of the light source. With the CL-500A, the general color rendering index (Ra) and the special color rendering index (R1 to R15) can be measured, allowing customers to easily understand the color rendering of the illumination source.
The "CL-500A" launched this time surpassed the highly acclaimed illuminance meter "T-10" and the color illuminance meter "CL-200A", which was originally designed as the flagship product in the Konica Minolta illuminance meter. It eliminates the limitation that the color rendering index can only be measured by large-scale installation equipment, and realizes the portable and light weight of the illuminometer. It only has a handheld design weighing 350g, and it is easy to measure without the need for placement. At the same time, the CL-500A can be used as a perfect combination of sensors and integrating sphere systems. This device is also the first lightweight integrated spectroradiometer to meet JIS and DIN standards. 
In addition to illuminance, chromaticity, and color temperature, it has become possible to measure color rendering index with portable instruments. The color rendering index indicates how close the measured light source is to the standard light source*. The maximum value is 100. The larger the difference in color development, the smaller the value, indicating that the difference between the color displayed by the measured light source and the natural primary color is larger.
The CL-500A is compliant with DIN 5032 Part 7 Class B and JIS C 1609-1:2006 AA General Standard. It is the first portable spectroradiometer to comply with both DIN and JIS standards.
※: The color temperature of the light source is expressed in å˜K (Kelvin). When the temperature rises, the order of color change is red → yellow → white → blue and white.
ã€main feature】
1. Measuring color rendering index
In addition to illuminance, chromaticity, and color temperature, it has become possible to measure color rendering index with portable instruments. The color rendering index indicates how close the measured light source is to the standard light source. The maximum value is 100. The larger the difference in color development, the smaller the value, indicating that the difference between the color displayed by the measured light source and the natural primary color is larger.
Through the spectroradiometer illuminometer CL-500A, the general color rendering index Ra (the average of the special color rendering indexes R1 to R8) and the 15 special color rendering indexes (R1 to R15) of the measured light source are clear at a glance. The color difference between the measured source and the standard source is also easily available. 
At the same time, the CL-500A is equipped with software that provides LED grading, allowing customers to clearly and directly understand the different LEDs by color grading. 
2. Small and lightweight handheld
The main unit measures 70 x 83 x 165 mm and weighs only 350g. It is easy to carry and can be hand-held. In addition, there are tripod fixing screw holes on the upper and lower sides, which can be easily combined with the bracket device. 
In February 2012, Konica Minolta Co., Ltd. introduced a new handheld spectroradiometer "CL-500A" for measuring the color rendering index of LED lighting and organic EL lighting. It can meet the needs of R&D design and quality management, as well as high-precision instruments for mass production and back-end inspection.