Standardization Options; Uv Filter - HunterLab LabScan XE Supplemental Manual

Standardization Options

UV Filter

Each LabScan XE is factory fitted with a UV filter to exclude UV content in a measurement.
The procedure is to standardize in 2 modes – one with the UV Filter Out-Of-View and one
with the UV Filter In-View for comparison. In this way, a numerical value for the ultraviolet
contribution can be documented.
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UV Filter Nominal position is set at factory and never changed. All Diagnostic test
programs are run with the UV Filter in the Nominal position to establish a consistent
optical path for the test across a model line. Some instrument models have
motorized UV Control as an option. If the instrument does not have the option, the
UV Filter will be fixed at the Nominal position. The instruments with motorized UV
Control move the UV Filter insertion to that position.
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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.
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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.
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UV Filter Custom can create one of more UV Filter states where the UV Filter
insertion point is custom set by the User.
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LabScan XE Supplemental Manual for EasyMatch QC
Figure 13. UV Calibration Mode Settings