4 | Perform Measurements BYK-Gardner GmbH
36 spectro2guide Family 295 024 855 E 2405
4.5 Fluorescence Measurement
The spectro2guide and the spectro2guide Pro can detect fluorescent light excited in UV and
visible range. With this function you can predict the color stability.
A monochromatic illumination is used to excite fluorescent material in the sample. For this the
instrument is equipped with additional 12 LEDs (360 - 660 nm):
• 2 ultra-violet LEDs and
• 10 monochromatic LEDs.
To measure fluorescence, the corresponding indices have to be activated. Go to Configuration
> Measurement parameter > Fluorescence.
Following indices are relevant:
• ΔE Fl: Indicates whether and how much fluorescent energy is emitted. The original speci-
men are compared to the specimen after the estimated fluorescence degradation.
• ΔE
zero
: Calculates the estimated color difference after the fluorescence has decayed.
Place instrument on flourescent sample and measure it, see for example “Difference Measure-
ment [}26]”.
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