How to Calibrate a Monitor
With an i1Display 2

Part 10 - Verifiable Accuracy

This is one of the things I really like about the X-rite Eye One Display Version 2 package. You can produce a detailed report verifying the accuracy of your Display Profile. It's not the kind of feature you would use every day, but once in a while it can come in very handy...

Plug in your Colorimeter and position it in the usual way. The feature you're looking for is called ‘Monitor Validator’. Within Eye One Match, Click ‘help and then ‘monitor validator’  You will see a window like this


Click the ‘Start Measurement’ button. Select your display type. Move the window (click & drag) that appears so that it is positioned with the 'bulls eye' directly behind the colorimeter. Press the ‘Start’ button to commence the validation process.


Stretch your legs for a minute or two and your report will appear.


The information on the right shows the average variance from ideal, in units of dE2000 (Delta E).  Anything under 1.00 is excellent as it’s considered a difference imperceptible to the human eye.  You can scroll through the breakdown of values above that if you wish. 

To the left there is a graph, which plots results over time.  Today’s plot of Average variance 0.47 dE is represented by a blue square, with a red border.  If you were to run this process again in a week a second blue square would be plotted and so on.  In this way you can plot your monitor's colour accuracy over time.

So revisiting the issue of how frequently you should re-calibrate; you could actually plot a graph of your own monitor’s performance to establish a suitable base frequency. If the Delta E is greater than say 1.5, after a week then you know you need to re-calibrate every week. If it take 4 weeks to wander then your base frequency is 4 weeks.

This feature can also be very useful if you suspect your monitor has developed a fault. It allows you to plot it's behavior over time to see if it is doing something unusual compared to its previous performance