
Cleaning the test tile
•Donotuseanyacetone!
The accuracy of the measurement can be
signicantlyimpactedbyusingdirtyordamaged
standards.
Since the surfaces of the standards are highly
sensitive, cleaning must be undertaken with great
care.
To clean standards, use a new lint-free cloth, dust-
free lens paper or an optical cloth.
Apply only slight pressure as you clean and make
certain there are no large particles stuck in the
cloth that could damage the surface.
Fordirtthatisdifculttoremove,useanoptical
cloth dipped in liquid. Then wipe the surface with a
dry optical cloth.
Exact calibration is not possible unless the
standardisinperfectcondition.Ifthecondition
of the standard seems doubtful because of its
appearance or measurement errors, we will be
happy to check it for you.
Cleaning and maintenance
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