Items of calibration service

Items of calibration service

How are Konica Minolta instruments checked or adjusted?
Of course, procedures and tools for checking measuring instruments are strongly depending on the type of instrument. As Konica Minolta has measuring instruments for a large range of different applications, also the range of tools to be used is very wide.
Konica Minolta is utilising multiple standards for light and colour as well as for size. Of course, all used standards are traceable to national or international higher level standards. Details can be found in the traceability area where also traceability charts for each kind of instrument are available.

About the used tools

• Light measuring instruments like luminance meters, illuminance meters, incident colour meters and spectroradiometers are adjusted on the optical bench. It is a 5 meter bench installed in a dark room, a certified tungsten lamp is controlled by DC power supply and used as standard. By changing the measurement distance, different illuminance levels can be simulated. Certified diffusers are used as standard for luminance measurements. For spectroradiometers like CS-1000 the bench is used for level calibration whilst wavelength calibration is done a by spectroscope.
• Monitor measuring devices like CA-100 are adjusted by using a standard monitor, video generator and a set of certified master probes. As Konica Minolta uses the same tools on a world-wide base, calibration of CA-100 will reach a world-wide compatibility.
• Convergence measuring devices like CC-100 & CC-110 are adjusted on a stage with special certified magnification charts. Convergence measurements are size measurements, thus the instruments can be adjusted by these charts which have holes in a specified size. By changing the zoom setting of the optical system during measurements, the linearity of the optical system can be verified and adjusted.
• Also 3D instruments are checked by utilising special certified 3D charts. As also for 3D measurements the size is the important issue, these instruments can be verified on charts which have a defined dimension. As dimensions may change for different temperature levels, all measurements are performed in temperature-controlled environment.
• Chroma meters like CR-400 are checked and adjusted with different colour tiles. Important is the inter-instrument agreement which is explained later on this page. Because BCRA colour tiles have a thermo chromatic effect (chromaticity changes by temperature), all calibrations are performed in temperature-controlled environment.
• Last but maybe most complex, the spectrophotometers are adjusted on a spectroscope or wavelength calibration box. A spectroscope is a device, which can send light of a very narrow wavelength band. By scanning the different wavelength, it is possible to capture the sensitivity of each single sensor in spectrophotometers or spectroradiometers. Based on this sensitivity and the check result of different colour tiles (for better inter-instrument agreement) the spectrophotometers are adjusted. Inspection of spectrophotometers inter-instrument agreement is performed by certified BCRA colour tiles.