22 Oct
2011
22 Oct
'11
2:40 a.m.
Roberto Michelena wrote:
Well, supposedly factory recalibration would be needed for a new white tile, but not for a new lamp... the device calibrates itself (by using the white tile whose reflectance is recorded in the firmware) every time, and that's how it compensates for lamp aging... that's how it would also compensate for lamp change I guess.
That's true, but some instruments may have sanity checks around the calibration, and may therefore fail if the lamp is too different to what's expected. This is how they detect lamp aging. Graeme Gill.