At which point in time does one take the readings? I calibrate after the set has warmed up for 4 hours.
Have left the set on for the day taking readings every 4 hours.
First 4 hours: Red Up, Blue Down
Second 4 hours: Red back down at the lower end, up in the Middle area, and Blue has now come back up.
2 More readings before I go to bed. But from past experiences, these values fluctuate up and down like a yoyo! Supply voltages up & down, weather damp & dry. I see some people are actually swapping out the unit's power supply and using batteries! Supposedly giving a cleaner PQ. In between viewings, recharge the batteries.
It's fine to get your x, y and Y right on the nose, but that's a passing value at that point in time. No wonder, when asked, do calibrators go back and relook at their calibrated settings, they say no because they aren't going to be the same any more. All we can do is get it as close as possible, then live with the eccentricities of electronics! And this is for an LED/LCD TV - what about projectors? Time to warm up, how old the bulb is, etc - man, we can calibrate to we're blue in the face, and never be done! (Then to, if you're hiding from the significant other!)
After 8 hours, left TV showing 100IRE Pattern for 2 Hours. Reading after 10 Hours, all the Blue from 10IRE to 100IRE dropped off to about -1, to -4, to -6, back to -4.
After 12 hours of now regular programming, Blue now back up to between -2 to -4.. Will stop at this point.
Edited by p5browne - 9/30/12 at 5:41pm