Chris Dennis wrote: > Closest Planckian temperature = 2337K (Delta E 52.215924) > Closest Daylight temperature = 2244K (Delta E 55.816505) > Closest Planckian temperature = 2784K (Delta E 50.227019) > Closest Daylight temperature = 2832K (Delta E 49.981937) It seems that the instrument is out of order. Try to clean the measuring openings by compressed air. It's possible there is some dust or foreign object on the filters. If it didn't helps, the instrument is broken definitely.