AA-94 Color Measurement InstrumentsC9800 Color Guide - 944. Insert the X-Rite Auto-Cal Strip into the 35mm slot on the front of the X-Rite DTP32—arrow end first—until it stops or the densitometer starts pulling the strip.Reading appears momentarily, followed by the density values and CALIBRATION OK.The densitometer automatically returns to the MAIN MENU.If UNRECOGNIZABLE STRIP appears, repeat the process or try cleaning the strip (see theX-Rite DTP32 Operating Manual).Recalibrate the DTP32 at least once per month. For critical color, calibrate thedensitometer every time you calibrate the Fiery. The DTP32 may also warnperiodically that it requires calibration.