Sorry, finger slipped. Should read "using this however, so test it first with your device". On 4 October 2010 10:14, Sam Berry <samkberry@xxxxxxxxxxxxxx> wrote: > The i1 Pro is only specified to measure from 0.2cdm upwards, and so all > three of these reading show a black level well under this. My personal > experience is that this limit is a realistic one, without using adaptive > integration times. I've had a negative black level returned a few times! > > I have heard others state that that under 0.5cdm the reading should be > treated with suspicion, and I'd agree with this too. > > I wouldn't worry about your device! If black levels are of critical > concern, use a DTP-94 colorimeter, or use the adaptive option in dispread. > I've had poorer colprof results using this how > > Regards, > Sam > > > On 3 October 2010 21:14, Marco N. <gialandra@xxxxxxxxx> wrote: > >> I have made three measurements on display with the same options, the first >> gives the black point out (too much dark), the others are OK. Is a >> instrument calibration failure? >> >> Thank you >> Marco >> >> BEGIN_DATA >> 1 0.0000 0.0000 0.0000 5.8822e-03 0.010610 9.9267e-03 >> 2 5.0000 5.0000 5.0000 0.18423 0.21697 0.30100 >> 3 10.000 10.000 10.000 0.67231 0.77301 0.95352 >> 4 15.000 15.000 15.000 1.7458 1.9546 2.2585 >> 5 20.000 20.000 20.000 3.5615 3.9371 4.2672 >> 6 25.000 25.000 25.000 5.8511 6.2793 6.8429 >> 7 30.000 30.000 30.000 8.6715 9.3097 10.071 >> 8 35.000 35.000 35.000 11.903 12.864 14.210 >> 9 40.000 40.000 40.000 16.394 17.338 19.027 >> 10 45.000 45.000 45.000 20.823 22.076 23.733 >> 11 50.000 50.000 50.000 26.309 28.071 30.361 >> 12 55.000 55.000 55.000 31.672 33.601 36.381 >> 13 60.000 60.000 60.000 37.840 40.064 42.966 >> 14 65.000 65.000 65.000 44.351 47.189 51.417 >> 15 70.000 70.000 70.000 52.021 55.427 60.091 >> 16 75.000 75.000 75.000 59.990 63.857 67.954 >> 17 80.000 80.000 80.000 68.513 73.000 79.133 >> 18 85.000 85.000 85.000 77.848 82.240 90.208 >> 19 90.000 90.000 90.000 87.158 92.887 100.92 >> 20 95.000 95.000 95.000 97.774 103.68 113.58 >> 21 100.00 100.00 100.00 111.85 118.17 129.15 >> >> BEGIN_DATA >> 1 0,0000 0,0000 0,0000 0,094782 0,10385 0,10051 >> 2 5,0000 5,0000 5,0000 0,40576 0,43867 0,46836 >> 3 10,000 10,000 10,000 1,0571 1,1405 1,2188 >> 4 15,000 15,000 15,000 2,2975 2,4849 2,6835 >> 5 20,000 20,000 20,000 4,2870 4,6460 4,8614 >> 6 25,000 25,000 25,000 6,7233 7,1392 7,5691 >> 7 30,000 30,000 30,000 9,6575 10,293 10,893 >> 8 35,000 35,000 35,000 12,938 13,904 15,089 >> 9 40,000 40,000 40,000 17,476 18,427 19,907 >> 10 45,000 45,000 45,000 21,943 23,198 24,583 >> 11 50,000 50,000 50,000 27,490 29,237 31,233 >> 12 55,000 55,000 55,000 32,913 34,834 37,286 >> 13 60,000 60,000 60,000 39,137 41,341 43,936 >> 14 65,000 65,000 65,000 45,698 48,527 52,404 >> 15 70,000 70,000 70,000 53,348 56,763 61,085 >> 16 75,000 75,000 75,000 61,292 65,156 68,886 >> 17 80,000 80,000 80,000 69,744 74,237 79,984 >> 18 85,000 85,000 85,000 78,929 83,336 90,906 >> 19 90,000 90,000 90,000 88,126 93,813 101,46 >> 20 95,000 95,000 95,000 98,523 104,39 113,93 >> 21 100,00 100,00 100,00 112,33 118,57 129,33 >> >> BEGIN_DATA >> 1 0,0000 0,0000 0,0000 0,10896 0,12264 0,11558 >> 2 5,0000 5,0000 5,0000 0,40525 0,44296 0,50293 >> 3 10,000 10,000 10,000 1,0625 1,1500 1,2508 >> 4 15,000 15,000 15,000 2,3303 2,5277 2,7324 >> 5 20,000 20,000 20,000 4,3409 4,7054 4,9363 >> 6 25,000 25,000 25,000 6,7602 7,1927 7,6650 >> 7 30,000 30,000 30,000 9,7816 10,429 11,052 >> 8 35,000 35,000 35,000 13,105 14,100 15,333 >> 9 40,000 40,000 40,000 17,794 18,744 20,304 >> 10 45,000 45,000 45,000 22,301 23,562 25,050 >> 11 50,000 50,000 50,000 27,952 29,723 31,784 >> 12 55,000 55,000 55,000 33,497 35,441 37,962 >> 13 60,000 60,000 60,000 39,870 42,094 44,764 >> 14 65,000 65,000 65,000 46,554 49,406 53,443 >> 15 70,000 70,000 70,000 54,369 57,810 62,290 >> 16 75,000 75,000 75,000 62,441 66,347 70,241 >> 17 80,000 80,000 80,000 71,000 75,552 81,489 >> 18 85,000 85,000 85,000 80,356 84,813 92,546 >> 19 90,000 90,000 90,000 89,632 95,409 103,19 >> 20 95,000 95,000 95,000 100,15 106,11 115,74 >> 21 100,00 100,00 100,00 114,07 120,41 131,20 >> >> >> >