"Graeme Gill" <graeme@xxxxxxxxxxxxx> wrote: > I guess it might still operate > if the error is ignored, it just won't give good results if there is no > temperature > drift calibration. So even if other software manages to work, I wouldn't trust > the readings from it. Thanks again Graeme. I used this instrument to calibrate and profile 4 different NEC LCD2690WUXi monitors, with what seemed to be excellent results. Wanting to know if it's necessary to send this instrument back to factory, I am trying to figure out some sort of test using one of the software I am currently able to use. Do you have any suggestion? Maybe I can try using another instrument as a "reference" to judge the DTP94 readings... Fabrizio