Appendix A - Definitions - Datacolor Elrepho 3000 Manual

ΔE ≤ 0.25 CMC maximum
Reproducibility
ΔE ≤ 0.15 CMC average
Physical/Electrical
Automatic UV control: 400nm, 420nm, 460nm cutoff filters:
automatic UV calibrator for measurement of
fluorescent samples
Power 95 to 265VAC, 45 to 65Hz, 50 VA
Environment 5 to 40° C, 20 to 85% RH, non-condensing
Interface RS-232 300/57,600 baud
* Specifications subject to change without notice.
Appendix A
Definitions
Reflectance factor , R - The ratio of the radiation reflected by a
body to that reflected by the perfect reflecting diffuser under the
same conditions of irradiation and viewing.
Intrinsic reflectance factor, R - The reflectance factor of a layer of
material of such a thickness that there is no change in reflectance
factor when the thickness is doubled.
Luminous reflectance factor - The reflectance factor, when
determined under conditions that simulate the spectral sensitivity of
the normal eye at daylight.
Y value - The luminous reflectance factor of a layer of material of
such a thickness that there is no change in the reflectance factor
when the thickness is doubled. (This quantity is also designated the
intrinsic luminous reflectance factor).
ISO brightness - The intrinsic reflectance factor measured at an
effective wavelength of 457nm under the conditions specified in
SCAN-P3, (for ISO brightness, the term diffuse blue reflectance
factor is also used).
Datacolor International
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Elrepho 3000