User Manual
Automatically warming up the display at start of the day
The display 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 dierent warm-
up 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 ve minutes, as not all ColorChecker
measurements could be completed in one minute with the PR-740.
Warm-up time White point Primaries/secondaries ColorChecker patterns
15 minutes < 1.5 ΔE 2000 < 1.0 ΔE 2000 < 1.0 ΔE 2000
30 minutes < 1.0 ΔE 2000 < 0.5 ΔE 2000 < 0.5 ΔE 2000
45 minutes < 0.5 ΔE 2000 < 0.25 ΔE 2000 < 0.5 ΔE 2000
60 minutes < 0.25 ΔE 2000 < 0.25 ΔE 2000 < 0.25 ΔE 2000
To set the display to automatically warm up:
1. Open the Calibration menu.
2. Choose the Set warm up time option and press Select.
If the internal clock has not been set, the display will rst ask you to set the clock. Enter the correct time
and date, set either 12- or 24-hour time, and set the time zone.
3. Choose Enable from the menu and press Select.
4. Choose Set time work begins and press Select.
5. Set the time of day that work begins.
6. Set the days of the week that should be considered work days.
The display will only warm itself up on the checked days.
Using external measurement instruments
The display includes a high-precision XYZ colorimeter and also provides native support for many types of
measurement instruments, from a low-cost colorimeter to high-end colorimeters and spectroradiometers.
These instruments can be used instead of the built-in instrument for calibration. In addition, external
instruments can be used to align the internal instrument.
Many of the supported instruments were chosen in consultation with HP’s studio partners and represent the
instruments they have standardized in their facilities. Some of these instruments require specic
congurations or calibrations in order to work properly with the display.
All of these instruments use USB to connect to one of the HP DreamColor USB ports on the display. No host-
based software is required for their operation but may be required for instrument conguration and
calibration.
IMPORTANT: With all of these instruments it is very important that the measurement instrument be
positioned so that it is perpendicular to the face of the display.
66 Chapter 3 Display calibration