HP DreamColor Z31x User Guide - Page 76
Aligning the internal colorimeter to an external reference instrument, Automatically warming up
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To download the data from the last calibration: 1. Insert a USB flash drive into one of the DreamColor USB ports. If the flash drive contains firmware or StudioCal XML files, an on-screen message displays asking if you want to use them. Cancel any menus that display. 2. Open the Calibration menu. 3. Select Export last calibration data. The calibration data is written to the inserted USB flash drive. Aligning the internal colorimeter to an external reference instrument The built-in XYZ colorimeter was aligned and calibrated at the factory against a Konica Minolta CA-310 instrument. While this alignment may be suitable for your needs, if you are deploying a number of displays, you may want to align the internal colorimeter of those displays to a house reference instrument. Use the Calibration menu for this task. See Using external measurement instruments on page 67 for more information on the supported external instruments. To align the internal colorimeter to an external reference instrument: 1. Allow the display to warm up for at least 30 minutes. 2. Ensure that the ambient lighting is set at the correct level: dim for a contact instrument and dark for a noncontact instrument. 3. Connect the external instrument to use for alignment. Dismiss any calibration menus that display. If using an X-Rite external instrument, adjust the position of the instrument and cord so they do not interfere with the internal instrument arm's operation. 4. Open the Calibration menu. 5. Select Align internal instrument to reference. 6. Select Align instruments. An alignment target is displayed. 7. Position the external instrument so that it is aligned with the target, and then press the Start Alignment button. The alignment will begin. If an error occurs, the display indicates whether the error occurred with the external or internal instrument. If the error is with the external instrument, check the instrument's configuration and ensure that the ambient lighting is not too bright for the instrument type. If the error is with the internal instrument, you may need to align the internal instrument's position using the provided menu option. This procedure takes about one minute and ensures that the motor start/stop positions are correctly aligned so that the instrument is properly positioned in front of the display. Automatically warming up the display at start of the day The Z31x can automatically warm itself up prior to the start of the day to ensure that it is ready for color critical work the moment the artist sits down at their desk. This option warms the display up for 30 minutes, which ensures the display accuracy to be under 1.0 ΔE 2000. For your reference, the following table shows the display accuracy, expressed as ΔE 2000, at different warmup times. These warm up times were determined by making timed measurements of the display from cold power on. White point, primaries, and secondaries were measured every minute using a Photo Research PR-740 spectroradiometer. ColorChecker patterns were measured every five minutes, as not all ColorChecker measurements could be completed in one minute with the PR-740. 66 Chapter 3 Display calibration