UltraScan PRO Supplemental Manual for EasyMatch QC Ver. 2.0
20
position. The instruments with motorized UV Control move the UV Filter insertion to that
position.
•
UV Filter IN
creates a UV-excluded measurement for UV optically-brightened agents. The
UV Filter is inserted 100% to exclude UV. This option allows the user to negate the effect of
optically-brightened agents or when used in multimode with UV Filter Nominal or UV Filter
Calibrated, determines the amount of optical brightening agents present.
•
UV Filter Calibrated
creates a UV-included measurement for UV optically-brightened
agents). This UV calibration procedure optimizes the UV content to match D65 Daylight over
time using a Fluorescent Standard with an assigned WI Ganz value. Once calibrated to the
Fluorescent standard (available as an option) with the UV filter inserted into the light path
such that the measured WI Ganz value
matches assigned WI Ganz value for the Fluorescent
standard. This UV CAL filter position is fixed and user-set until the next UV Calibration.
•
UV Filter Custom
can create one of more UV Filter states where the UV Filter insertion point
is custom set by the User.
UV filter calibration should be performed weekly and after lamp replacement. Once
SENSOR > UV
FILTER CALIBRATION
is chosen, the following screen appears.
Figure 21. UV Calibration
Enter the standard’s
ASSIGNED VALUE
into the appropriate box on the UV Calibration screen. This
value has been assigned at the factory if you are using the HunterLab-supplied fluorescent standard.
Also choose whether the value is for
BRIGHTNESS 457, WHITENESS INDEX CIE
(and the
illuminant/observer combination),
WHITENESS INDEX GANZ
, or
Z%
. The scale used in the example will
be WI Ganz for a HunterLab standard.
Figure 22. UV Calibration with WI Ganz
Select
CALIBRATE UV
to automatically adjust the UV filter to the appropriate position after several
readings of the fluorescent standard. First you are prompted to place the fluorescent standard at the
port.
