BYK-Gardner GmbH Perform Measurements | 4
295 024 855 E 2405 spectro2guide Family 37
The status of the fluorescence detection is signaled via an acoustic and a visual signal. For the
visual signal the status LED on the top of the instrument is used, see “Frontside [}14]”:
• Status LED = Blue: Fluorescence has been detected.
– Emitted energy > 1% of excited energy.
– This must apply to at least 1 of the 12 monochromatic LEDs.
• Status LED = Pink: Fluorescence excides predefined limit.
– The difference has to be larger than 1/3 of the tolerance due to fluorescence.
– This tolerance value can be customized in the software “smart-chart”.
A quantification of the fluorescent light is possible with the “Fluorescence” slider in the soft-
ware “smart-chart”.
A calculation is made for the color data after fluorescence has decayed - e.g. due to the impact
of sunlight.
4.6 Jetness Measurement
The spectro2guide Pro can measure the jetness of deep black colors with special indices.
NOTICE
For jetness measurements separate check and calibration standards are included, see “Instru-
ment Calibration [}58]” > “Pro Variant [}65]”.
To switch the instrument into jetness measurement mode the corresponding indices must be ac-
tivated. Go to Configuration > Measurement parameter > Jetness indices.
For blackness / jetness measurement following indices are relevant:
• My: Blackness determines the lightness of black without colored undertone.
• Mc: Jetness determines the color depending black value.
• dM: Undertone determines the absolute contribution of hue.
– Undertone +dM = Blue shade
– – Undertone -dM = Brown shade
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