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The calibration chart can be used to calibrate devices including the RS400 and RS800.
Techkon’s SpectroCheck is a specifically designed and advanced color reference tool for checking the measurement accuracy of a Techkon SpectroDens, SpectroJet or SpectroDrive. It is designed and built with the same thinking put into our German-engineered precision instruments beginning with a highly stable base plate that is machined from a solid piece of aluminum. Next, (8) pieces of ceramic tile are factory-referenced to color calibration data of the National Institute of Standards and Technology (NIST)….
The USB cable is for the SpectroJet2.